path: root/devdocs/html/element%2Finput%2Fdate.html

<header><h1>&lt;input type="date"&gt;</h1></header><div class="section-content">
<p><a href="../input"><code>&lt;input&gt;</code></a> elements of <code>type="date"</code> create input fields that let the user enter a date, either with a textbox that validates the input or a special date picker interface.</p> <p>The resulting value includes the year, month, and day, but <em>not</em> the time. The <a href="time">time</a> and <a href="datetime-local">datetime-local</a> input types support time and date+time input.</p>
</div>
<h2 id="try_it">Try it</h2>
<div class="section-content">
<iframe class="interactive is-tabbed-shorter-height" height="200" src="https://interactive-examples.mdn.mozilla.net/pages/tabbed/input-date.html" title="MDN Web Docs Interactive Example" loading="lazy"></iframe> <p>The input UI generally varies from browser to browser; see <a href="#browser_compatibility">Browser compatibility</a> for further details. In unsupported browsers, the control degrades gracefully to <a href="text"><code>&lt;input type="text"&gt;</code></a>.</p>
</div>
<h2 id="value">Value</h2>
<div class="section-content">
<p>A string representing the date entered in the input. The date is formatted according to <a href="../../date_and_time_formats#date_strings">Date strings format</a>.</p> <p>You can set a default value for the input with a date inside the <a href="../input#value"><code>value</code></a> attribute, like so:</p> <div class="code-example">
<p class="example-header"><span class="language-name">html</span></p>
<pre data-signature="WfmbJO8A0/Bi7arHVg933iDAcElQisLM8fzctfLyObk=" data-language="html"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>input</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>date<span class="token punctuation">"</span></span> <span class="token attr-name">value</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>2017-06-01<span class="token punctuation">"</span></span> <span class="token punctuation">/&gt;</span></span>
</pre>
</div>
<div class="code-example" id="sect1">

<iframe class="sample-code-frame" title="Value sample" id="frame_value" width="600" height="60" src="https://live.mdnplay.dev/en-US/docs/Web/HTML/Element/input/date/runner.html?id=value" loading="lazy"></iframe>
</div> <div class="notecard note" id="sect2"> <p><strong>Note:</strong> The displayed date format will differ from the actual <code>value</code> — the displayed date is formatted <em>based on the locale of the user's browser</em>, but the parsed <code>value</code> is always formatted <code>yyyy-mm-dd</code>.</p> </div> <p>You can get and set the date value in JavaScript with the <a href="https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement"><code>HTMLInputElement</code></a> <code>value</code> and <code>valueAsNumber</code> properties. For example:</p> <div class="code-example">
<p class="example-header"><span class="language-name">js</span></p>
<pre data-signature="MrZAhicZzoworJfwiGGbGBZgCmMrkEzpV1DGUy4R3Nw=" data-language="js"><span class="token keyword">const</span> dateControl <span class="token operator">=</span> document<span class="token punctuation">.</span><span class="token function">querySelector</span><span class="token punctuation">(</span><span class="token string">'input[type="date"]'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
dateControl<span class="token punctuation">.</span>value <span class="token operator">=</span> <span class="token string">"2017-06-01"</span><span class="token punctuation">;</span>
console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>dateControl<span class="token punctuation">.</span>value<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// prints "2017-06-01"</span>
console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>dateControl<span class="token punctuation">.</span>valueAsNumber<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// prints 1496275200000, a JavaScript timestamp (ms)</span>
</pre>
</div> <p>This code finds the first <a href="../input"><code>&lt;input&gt;</code></a> element whose <code>type</code> is <code>date</code>, and sets its value to <code>2017-06-01</code> (June 1st, 2017). It then reads that value back in string and number formats.</p>
</div>
<h2 id="additional_attributes">Additional attributes</h2>
<div class="section-content"><p>The attributes common to all <a href="../input"><code>&lt;input&gt;</code></a> elements apply to the <code>date</code> inputs as well, but might not influence its presentation. For example <code>size</code> and <code>placeholder</code> might not work. <code>date</code> inputs have the following additional attributes.</p></div>
<h3 id="max">max</h3>
<div class="section-content">
<p>The latest date to accept. If the <a href="../input#value"><code>value</code></a> entered into the element occurs afterward, the element fails <a href="../../constraint_validation">constraint validation</a>. If the value of the <code>max</code> attribute isn't a possible date string in the format <code>yyyy-mm-dd</code>, then the element has no maximum date value.</p> <p>If both the <code>max</code> and <code>min</code> attributes are set, this value must be a date string <strong>later than or equal to</strong> the one in the <code>min</code> attribute.</p>
</div>
<h3 id="min">min</h3>
<div class="section-content">
<p>The earliest date to accept. If the <a href="../input#value"><code>value</code></a> entered into the element occurs beforehand, the element fails <a href="../../constraint_validation">constraint validation</a>. If the value of the <code>min</code> attribute isn't a possible date string in the format <code>yyyy-mm-dd</code>, then the element has no minimum date value.</p> <p>If both the <code>max</code> and <code>min</code> attributes are set, this value must be a date string <strong>earlier than or equal to</strong> the one in the <code>max</code> attribute.</p>
</div>
<h3 id="step">step</h3>
<div class="section-content">
<p>The <code>step</code> attribute is a number that specifies the granularity that the value must adhere to, or the special value <code>any</code>, which is described below. Only values which are equal to the basis for stepping (<a href="#min"><code>min</code></a> if specified, <a href="../input#value"><code>value</code></a> otherwise, and an appropriate default value if neither of those is provided) are valid.</p> <p>A string value of <code>any</code> means that no stepping is implied, and any value is allowed (barring other constraints, such as <a href="#min"><code>min</code></a> and <a href="#max"><code>max</code></a>).</p> <div class="notecard note" id="sect3"> <p><strong>Note:</strong> When the data entered by the user doesn't adhere to the stepping configuration, the <a href="https://developer.mozilla.org/en-US/docs/Glossary/User_agent">user agent</a> may round to the nearest valid value, preferring numbers in the positive direction when there are two equally close options.</p> </div> <p>For <code>date</code> inputs, the value of <code>step</code> is given in days; and is treated as a number of milliseconds equal to 86,400,000 times the <code>step</code> value (the underlying numeric value is in milliseconds). The default value of <code>step</code> is 1, indicating 1 day.</p> <div class="notecard note" id="sect4"> <p><strong>Note:</strong> Specifying <code>any</code> as the value for <code>step</code> has the same effect as <code>1</code> for <code>date</code> inputs.</p> </div>
</div>
<h2 id="using_date_inputs">Using date inputs</h2>
<div class="section-content">
<p>Date inputs provide an easy interface for choosing dates, and they normalize the data format sent to the server regardless of the user's locale.</p> <p>In this section, we'll look at basic and then more complex uses of <code>&lt;input type="date"&gt;</code>.</p>
</div>
<h3 id="basic_uses_of_date">Basic uses of date</h3>
<div class="section-content">
<p>The simplest use of <code>&lt;input type="date"&gt;</code> involves one <code>&lt;input&gt;</code> combined with its <a href="../label"><code>&lt;label&gt;</code></a>, as seen below:</p> <div class="code-example">
<p class="example-header"><span class="language-name">html</span></p>
<pre data-signature="V/Km4uIkNxFTRYG4UbDDp2jQ0YmZooygZMOLGfbJHpM=" data-language="html"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>form</span> <span class="token attr-name">action</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>https://example.com<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>label</span><span class="token punctuation">&gt;</span></span>
    Enter your birthday:
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>input</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>date<span class="token punctuation">"</span></span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>bday<span class="token punctuation">"</span></span> <span class="token punctuation">/&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>label</span><span class="token punctuation">&gt;</span></span>

  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>p</span><span class="token punctuation">&gt;</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>button</span><span class="token punctuation">&gt;</span></span>Submit<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>button</span><span class="token punctuation">&gt;</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>p</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>form</span><span class="token punctuation">&gt;</span></span>
</pre>
</div>
<div class="code-example" id="sect5">

<iframe class="sample-code-frame" title="Basic uses of date sample" id="frame_basic_uses_of_date" width="600" height="60" src="https://live.mdnplay.dev/en-US/docs/Web/HTML/Element/input/date/runner.html?id=basic_uses_of_date" loading="lazy"></iframe>
</div> <p>This HTML submits the entered date under the key <code>bday</code> to <code>https://example.com</code> — resulting in a URL like <code>https://example.com/?bday=1955-06-08</code>.</p>
</div>
<h3 id="setting_maximum_and_minimum_dates">Setting maximum and minimum dates</h3>
<div class="section-content">
<p>You can use the <a href="../input#min"><code>min</code></a> and <a href="../input#max"><code>max</code></a> attributes to restrict the dates that can be chosen by the user. In the following example, we set a minimum date of <code>2017-04-01</code> and a maximum date of <code>2017-04-30</code>:</p> <div class="code-example">
<p class="example-header"><span class="language-name">html</span></p>
<pre data-signature="m7gSoYvMMBhdKCaQtE7if2nXl1zn+BLukGj814VP4S4=" data-language="html"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>form</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>label</span><span class="token punctuation">&gt;</span></span>
    Choose your preferred party date:
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>input</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>date<span class="token punctuation">"</span></span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>party<span class="token punctuation">"</span></span> <span class="token attr-name">min</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>2017-04-01<span class="token punctuation">"</span></span> <span class="token attr-name">max</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>2017-04-30<span class="token punctuation">"</span></span> <span class="token punctuation">/&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>label</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>form</span><span class="token punctuation">&gt;</span></span>
</pre>
</div>
<div class="code-example" id="sect6">

<iframe class="sample-code-frame" title="Setting maximum and minimum dates sample" id="frame_setting_maximum_and_minimum_dates" width="600" height="60" src="https://live.mdnplay.dev/en-US/docs/Web/HTML/Element/input/date/runner.html?id=setting_maximum_and_minimum_dates" loading="lazy"></iframe>
</div> <p>The result is that only days in April 2017 can be selected — the month and year parts of the textbox will be uneditable, and dates outside April 2017 can't be selected in the picker widget.</p> <div class="notecard note" id="sect7"> <p><strong>Note:</strong> You <em>should</em> be able to use the <a href="../input#step"><code>step</code></a> attribute to vary the number of days jumped each time the date is incremented (e.g. to only make Saturdays selectable). However, this does not seem to be in any implementation at the time of writing.</p> </div>
</div>
<h3 id="controlling_input_size">Controlling input size</h3>
<div class="section-content"><p><code>&lt;input type="date"&gt;</code> doesn't support form sizing attributes such as <a href="../input#size"><code>size</code></a>. Prefer <a href="https://developer.mozilla.org/en-US/docs/Web/CSS">CSS</a> for sizing it.</p></div>
<h2 id="validation">Validation</h2>
<div class="section-content">
<p>By default, <code>&lt;input type="date"&gt;</code> doesn't validate the entered value beyond its format. The interfaces generally don't let you enter anything that isn't a date — which is helpful — but you can leave the field empty or enter an invalid date in browsers where the input falls back to type <code>text</code> (like the 32nd of April).</p> <p>If you use <a href="../input#min"><code>min</code></a> and <a href="../input#max"><code>max</code></a> to restrict the available dates (see <a href="#setting_maximum_and_minimum_dates">Setting maximum and minimum dates</a>), supporting browsers will display an error if you try to submit a date that is out of bounds. However, you'll need to double-check the submitted results to ensure the value is within these dates, if the date picker isn't fully supported on the user's device.</p> <p>You can also use the <a href="../input#required"><code>required</code></a> attribute to make filling in the date mandatory — an error will be displayed if you try to submit an empty date field. This should work in most browsers, even if they fall back to a text input.</p> <p>Let's look at an example of minimum and maximum dates, and also made a field required:</p> <div class="code-example">
<p class="example-header"><span class="language-name">html</span></p>
<pre data-signature="NWEjyuRpnbuAqGvLVjiBbfRtGtecKZtT9uIcPGpCR/E=" data-language="html"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>form</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>label</span><span class="token punctuation">&gt;</span></span>
    Choose your preferred party date (required, April 1st to 20th):
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>input</span>
      <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>date<span class="token punctuation">"</span></span>
      <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>party<span class="token punctuation">"</span></span>
      <span class="token attr-name">min</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>2017-04-01<span class="token punctuation">"</span></span>
      <span class="token attr-name">max</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>2017-04-20<span class="token punctuation">"</span></span>
      <span class="token attr-name">required</span> <span class="token punctuation">/&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>span</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>validity<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>span</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>label</span><span class="token punctuation">&gt;</span></span>

  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>p</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>button</span><span class="token punctuation">&gt;</span></span>Submit<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>button</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>p</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>form</span><span class="token punctuation">&gt;</span></span>
</pre>
</div> <p>If you try to submit the form with an incomplete date (or with a date outside the set bounds), the browser displays an error. Try playing with the example now:</p>
<div class="code-example" id="sect8">

<iframe class="sample-code-frame" title="Validation sample" id="frame_validation" width="600" height="100" src="https://live.mdnplay.dev/en-US/docs/Web/HTML/Element/input/date/runner.html?id=validation" loading="lazy"></iframe>
</div> <p>Here's the CSS used in the above example. We make use of the <a href="https://developer.mozilla.org/en-US/docs/Web/CSS/:valid"><code>:valid</code></a> and <a href="https://developer.mozilla.org/en-US/docs/Web/CSS/:invalid"><code>:invalid</code></a> <a href="https://developer.mozilla.org/en-US/docs/Web/CSS/Pseudo-elements">pseudo-elements</a> to add an icon next to the input, based on whether the current value is valid. We had to put the icon on a <a href="../span"><code>&lt;span&gt;</code></a> next to the input, not on the input itself, because in Chrome at least the input's generated content is placed inside the form control, and can't be styled or shown effectively.</p> <div class="code-example">
<p class="example-header"><span class="language-name">css</span></p>
<pre data-signature="txgXDu2qdp2pwLPTqbhgKyjHGjWShXlxYrqg0Xhlkg0=" data-language="css"><span class="token selector">label</span> <span class="token punctuation">{</span>
  <span class="token property">display</span><span class="token punctuation">:</span> flex<span class="token punctuation">;</span>
  <span class="token property">align-items</span><span class="token punctuation">:</span> center<span class="token punctuation">;</span>
<span class="token punctuation">}</span>

<span class="token selector">span::after</span> <span class="token punctuation">{</span>
  <span class="token property">padding-left</span><span class="token punctuation">:</span> 5px<span class="token punctuation">;</span>
<span class="token punctuation">}</span>

<span class="token selector">input:invalid + span::after</span> <span class="token punctuation">{</span>
  <span class="token property">content</span><span class="token punctuation">:</span> <span class="token string">"✖"</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>

<span class="token selector">input:valid + span::after</span> <span class="token punctuation">{</span>
  <span class="token property">content</span><span class="token punctuation">:</span> <span class="token string">"✓"</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
</pre>
</div> <div class="notecard warning" id="sect9"> <p><strong>Warning:</strong> Client-side form validation <em>is no substitute</em> for validating on the server. It's easy for someone to modify the HTML, or bypass your HTML entirely and submit the data directly to your server. If your server fails to validate the received data, disaster could strike with data that is badly-formatted, too large, of the wrong type, etc.</p> </div>
</div>
<h2 id="handling_browser_support">Handling browser support</h2>
<div class="section-content">
<p>Browsers that don't support this input type gracefully degrade to a text input, but this creates problems in consistency of user interface (the presented controls are different) and data handling.</p> <p>The second problem is the more serious one; with date input supported, the value is normalized to the format <code>yyyy-mm-dd</code>. But with a text input, the browser has no recognition of what format the date should be in, and there are many formats in which people write dates. For example:</p> <ul> <li><code>ddmmyyyy</code></li> <li><code>dd/mm/yyyy</code></li> <li><code>mm/dd/yyyy</code></li> <li><code>dd-mm-yyyy</code></li> <li><code>mm-dd-yyyy</code></li> <li><code>Month dd, yyyy</code></li> </ul> <p>One way around this is the <a href="../input#pattern"><code>pattern</code></a> attribute on your date input. Even though the date picker doesn't use it, the text input fallback will. For example, try viewing the following in an unsupporting browser:</p> <div class="code-example">
<p class="example-header"><span class="language-name">html</span></p>
<pre data-signature="8H9i2rjwtXpITcy6a0/FO5atGGApk/x0lNX6zcAIDFQ=" data-language="html"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>form</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>label</span><span class="token punctuation">&gt;</span></span>
    Enter your birthday:
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>input</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>date<span class="token punctuation">"</span></span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>bday<span class="token punctuation">"</span></span> <span class="token attr-name">required</span> <span class="token attr-name">pattern</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>\d{4}-\d{2}-\d{2}<span class="token punctuation">"</span></span> <span class="token punctuation">/&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>span</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>validity<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>span</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>label</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>p</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>button</span><span class="token punctuation">&gt;</span></span>Submit<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>button</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>p</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>form</span><span class="token punctuation">&gt;</span></span>
</pre>
</div>
<div class="code-example" id="sect10">

<iframe class="sample-code-frame" title="Handling browser support sample" id="frame_handling_browser_support" width="600" height="100" src="https://live.mdnplay.dev/en-US/docs/Web/HTML/Element/input/date/runner.html?id=handling_browser_support" loading="lazy"></iframe>
</div> <p>If you submit it, you'll see that the browser displays an error and highlights the input as invalid if your entry doesn't match the pattern <code>####-##-##</code> (where <code>#</code> is a digit from 0 to 9). Of course, this doesn't stop people from entering invalid dates, or incorrect formats. So we still have a problem.</p>  <p>At the moment, the best way to deal with dates in forms in a cross-browser way is to have the user enter the day, month, and year in separate controls, or to use a JavaScript library such as <a href="https://jqueryui.com/datepicker/" target="_blank">jQuery date picker</a>.</p>
</div>
<h2 id="examples">Examples</h2>
<div class="section-content">
<p>In this example, we create 2 sets of UI elements for choosing dates: a native <code>&lt;input type="date"&gt;</code> picker and a set of 3 <a href="../select"><code>&lt;select&gt;</code></a> elements for older browsers that don't support the native date input.</p>
<div class="code-example" id="sect11">

<iframe class="sample-code-frame" title="Examples sample" id="frame_examples" width="600" height="100" src="https://live.mdnplay.dev/en-US/docs/Web/HTML/Element/input/date/runner.html?id=examples" loading="lazy"></iframe>
</div>
</div>
<h3 id="html">HTML</h3>
<div class="section-content">
<p>The HTML looks like so:</p> <div class="code-example">
<p class="example-header"><span class="language-name">html</span></p>
<pre data-signature="kUv/LFii3Oe9Gidt8oxYHDg2LVgn47pVKTtTH3Wb7UI=" data-language="html"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>form</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>nativeDatePicker<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>label</span> <span class="token attr-name">for</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>bday<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span>Enter your birthday:<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>label</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>input</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>date<span class="token punctuation">"</span></span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>bday<span class="token punctuation">"</span></span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>bday<span class="token punctuation">"</span></span> <span class="token punctuation">/&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>span</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>validity<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>span</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>p</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>fallbackLabel<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span>Enter your birthday:<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>p</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>fallbackDatePicker<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>span</span><span class="token punctuation">&gt;</span></span>
      <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>label</span> <span class="token attr-name">for</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>day<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span>Day:<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>label</span><span class="token punctuation">&gt;</span></span>
      <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>select</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>day<span class="token punctuation">"</span></span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>day<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>select</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>span</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>span</span><span class="token punctuation">&gt;</span></span>
      <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>label</span> <span class="token attr-name">for</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>month<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span>Month:<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>label</span><span class="token punctuation">&gt;</span></span>
      <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>select</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>month<span class="token punctuation">"</span></span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>month<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>option</span> <span class="token attr-name">selected</span><span class="token punctuation">&gt;</span></span>January<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>option</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>option</span><span class="token punctuation">&gt;</span></span>February<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>option</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>option</span><span class="token punctuation">&gt;</span></span>March<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>option</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>option</span><span class="token punctuation">&gt;</span></span>April<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>option</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>option</span><span class="token punctuation">&gt;</span></span>May<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>option</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>option</span><span class="token punctuation">&gt;</span></span>June<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>option</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>option</span><span class="token punctuation">&gt;</span></span>July<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>option</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>option</span><span class="token punctuation">&gt;</span></span>August<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>option</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>option</span><span class="token punctuation">&gt;</span></span>September<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>option</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>option</span><span class="token punctuation">&gt;</span></span>October<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>option</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>option</span><span class="token punctuation">&gt;</span></span>November<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>option</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>option</span><span class="token punctuation">&gt;</span></span>December<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>option</span><span class="token punctuation">&gt;</span></span>
      <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>select</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>span</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>span</span><span class="token punctuation">&gt;</span></span>
      <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>label</span> <span class="token attr-name">for</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>year<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span>Year:<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>label</span><span class="token punctuation">&gt;</span></span>
      <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>select</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>year<span class="token punctuation">"</span></span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>year<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>select</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>span</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>form</span><span class="token punctuation">&gt;</span></span>
</pre>
</div> <p>The months are hardcoded (as they are always the same), while the day and year values are dynamically generated depending on the currently selected month and year, and the current year (see the code comments below for detailed explanations of how these functions work.)</p> 
</div>
<h3 id="javascript">JavaScript</h3>
<div class="section-content">
<p>The other part of the code that may be of interest is the feature detection code — to detect whether the browser supports <code>&lt;input type="date"&gt;</code>.</p> <p>We create a new <a href="../input"><code>&lt;input&gt;</code></a> element, try setting its <code>type</code> to <code>date</code>, then immediately check what its type is — unsupporting browsers will return <code>text</code>, because the <code>date</code> type falls back to type <code>text</code>. If <code>&lt;input type="date"&gt;</code> isn't supported, we hide the native picker and show the fallback (<a href="../select"><code>&lt;select&gt;</code></a>) instead.</p> <div class="code-example">
<p class="example-header"><span class="language-name">js</span></p>
<pre data-signature="EK8fANrC/d89euWbDxZwymaQ0iynwXLeVLQJiomcSi8=" data-language="js"><span class="token comment">// Obtain UI widgets</span>
<span class="token keyword">const</span> nativePicker <span class="token operator">=</span> document<span class="token punctuation">.</span><span class="token function">querySelector</span><span class="token punctuation">(</span><span class="token string">".nativeDatePicker"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">const</span> fallbackPicker <span class="token operator">=</span> document<span class="token punctuation">.</span><span class="token function">querySelector</span><span class="token punctuation">(</span><span class="token string">".fallbackDatePicker"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">const</span> fallbackLabel <span class="token operator">=</span> document<span class="token punctuation">.</span><span class="token function">querySelector</span><span class="token punctuation">(</span><span class="token string">".fallbackLabel"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

<span class="token keyword">const</span> yearSelect <span class="token operator">=</span> document<span class="token punctuation">.</span><span class="token function">querySelector</span><span class="token punctuation">(</span><span class="token string">"#year"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">const</span> monthSelect <span class="token operator">=</span> document<span class="token punctuation">.</span><span class="token function">querySelector</span><span class="token punctuation">(</span><span class="token string">"#month"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">const</span> daySelect <span class="token operator">=</span> document<span class="token punctuation">.</span><span class="token function">querySelector</span><span class="token punctuation">(</span><span class="token string">"#day"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

<span class="token comment">// hide fallback initially</span>
fallbackPicker<span class="token punctuation">.</span>style<span class="token punctuation">.</span>display <span class="token operator">=</span> <span class="token string">"none"</span><span class="token punctuation">;</span>
fallbackLabel<span class="token punctuation">.</span>style<span class="token punctuation">.</span>display <span class="token operator">=</span> <span class="token string">"none"</span><span class="token punctuation">;</span>

<span class="token comment">// test whether a new date input falls back to a text input or not</span>
<span class="token keyword">const</span> test <span class="token operator">=</span> document<span class="token punctuation">.</span><span class="token function">createElement</span><span class="token punctuation">(</span><span class="token string">"input"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

<span class="token keyword">try</span> <span class="token punctuation">{</span>
  test<span class="token punctuation">.</span>type <span class="token operator">=</span> <span class="token string">"date"</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span>e<span class="token punctuation">)</span> <span class="token punctuation">{</span>
  console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>e<span class="token punctuation">.</span>message<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>

<span class="token comment">// if it does, run the code inside the if () {} block</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>test<span class="token punctuation">.</span>type <span class="token operator">===</span> <span class="token string">"text"</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
  <span class="token comment">// hide the native picker and show the fallback</span>
  nativePicker<span class="token punctuation">.</span>style<span class="token punctuation">.</span>display <span class="token operator">=</span> <span class="token string">"none"</span><span class="token punctuation">;</span>
  fallbackPicker<span class="token punctuation">.</span>style<span class="token punctuation">.</span>display <span class="token operator">=</span> <span class="token string">"block"</span><span class="token punctuation">;</span>
  fallbackLabel<span class="token punctuation">.</span>style<span class="token punctuation">.</span>display <span class="token operator">=</span> <span class="token string">"block"</span><span class="token punctuation">;</span>

  <span class="token comment">// populate the days and years dynamically</span>
  <span class="token comment">// (the months are always the same, therefore hardcoded)</span>
  <span class="token function">populateDays</span><span class="token punctuation">(</span>monthSelect<span class="token punctuation">.</span>value<span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token function">populateYears</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>

<span class="token keyword">function</span> <span class="token function">populateDays</span><span class="token punctuation">(</span><span class="token parameter">month</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
  <span class="token comment">// delete the current set of &lt;option&gt; elements out of the</span>
  <span class="token comment">// day &lt;select&gt;, ready for the next set to be injected</span>
  <span class="token keyword">while</span> <span class="token punctuation">(</span>daySelect<span class="token punctuation">.</span>firstChild<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    daySelect<span class="token punctuation">.</span><span class="token function">removeChild</span><span class="token punctuation">(</span>daySelect<span class="token punctuation">.</span>firstChild<span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span>

  <span class="token comment">// Create variable to hold new number of days to inject</span>
  <span class="token keyword">let</span> dayNum<span class="token punctuation">;</span>

  <span class="token comment">// 31 or 30 days?</span>
  <span class="token keyword">if</span> <span class="token punctuation">(</span>
    <span class="token punctuation">[</span>
      <span class="token string">"January"</span><span class="token punctuation">,</span>
      <span class="token string">"March"</span><span class="token punctuation">,</span>
      <span class="token string">"May"</span><span class="token punctuation">,</span>
      <span class="token string">"July"</span><span class="token punctuation">,</span>
      <span class="token string">"August"</span><span class="token punctuation">,</span>
      <span class="token string">"October"</span><span class="token punctuation">,</span>
      <span class="token string">"December"</span><span class="token punctuation">,</span>
    <span class="token punctuation">]</span><span class="token punctuation">.</span><span class="token function">includes</span><span class="token punctuation">(</span>month<span class="token punctuation">)</span>
  <span class="token punctuation">)</span> <span class="token punctuation">{</span>
    dayNum <span class="token operator">=</span> <span class="token number">31</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token string">"April"</span><span class="token punctuation">,</span> <span class="token string">"June"</span><span class="token punctuation">,</span> <span class="token string">"September"</span><span class="token punctuation">,</span> <span class="token string">"November"</span><span class="token punctuation">]</span><span class="token punctuation">.</span><span class="token function">includes</span><span class="token punctuation">(</span>month<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    dayNum <span class="token operator">=</span> <span class="token number">30</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token punctuation">{</span>
    <span class="token comment">// If month is February, calculate whether it is a leap year or not</span>
    <span class="token keyword">const</span> year <span class="token operator">=</span> yearSelect<span class="token punctuation">.</span>value<span class="token punctuation">;</span>
    <span class="token keyword">const</span> isLeap <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Date</span><span class="token punctuation">(</span>year<span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">29</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getMonth</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">===</span> <span class="token number">1</span><span class="token punctuation">;</span>
    dayNum <span class="token operator">=</span> isLeap <span class="token operator">?</span> <span class="token number">29</span> <span class="token operator">:</span> <span class="token number">28</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span>

  <span class="token comment">// inject the right number of new &lt;option&gt; elements into the day &lt;select&gt;</span>
  <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">let</span> i <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">;</span> i <span class="token operator">&lt;=</span> dayNum<span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token keyword">const</span> option <span class="token operator">=</span> document<span class="token punctuation">.</span><span class="token function">createElement</span><span class="token punctuation">(</span><span class="token string">"option"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    option<span class="token punctuation">.</span>textContent <span class="token operator">=</span> i<span class="token punctuation">;</span>
    daySelect<span class="token punctuation">.</span><span class="token function">appendChild</span><span class="token punctuation">(</span>option<span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span>

  <span class="token comment">// if previous day has already been set, set daySelect's value</span>
  <span class="token comment">// to that day, to avoid the day jumping back to 1 when you</span>
  <span class="token comment">// change the year</span>
  <span class="token keyword">if</span> <span class="token punctuation">(</span>previousDay<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    daySelect<span class="token punctuation">.</span>value <span class="token operator">=</span> previousDay<span class="token punctuation">;</span>

    <span class="token comment">// If the previous day was set to a high number, say 31, and then</span>
    <span class="token comment">// you chose a month with less total days in it (e.g. February),</span>
    <span class="token comment">// this part of the code ensures that the highest day available</span>
    <span class="token comment">// is selected, rather than showing a blank daySelect</span>
    <span class="token keyword">if</span> <span class="token punctuation">(</span>daySelect<span class="token punctuation">.</span>value <span class="token operator">===</span> <span class="token string">""</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
      daySelect<span class="token punctuation">.</span>value <span class="token operator">=</span> previousDay <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token keyword">if</span> <span class="token punctuation">(</span>daySelect<span class="token punctuation">.</span>value <span class="token operator">===</span> <span class="token string">""</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
      daySelect<span class="token punctuation">.</span>value <span class="token operator">=</span> previousDay <span class="token operator">-</span> <span class="token number">2</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token keyword">if</span> <span class="token punctuation">(</span>daySelect<span class="token punctuation">.</span>value <span class="token operator">===</span> <span class="token string">""</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
      daySelect<span class="token punctuation">.</span>value <span class="token operator">=</span> previousDay <span class="token operator">-</span> <span class="token number">3</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

<span class="token keyword">function</span> <span class="token function">populateYears</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
  <span class="token comment">// get this year as a number</span>
  <span class="token keyword">const</span> date <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Date</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token keyword">const</span> year <span class="token operator">=</span> date<span class="token punctuation">.</span><span class="token function">getFullYear</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

  <span class="token comment">// Make this year, and the 100 years before it available in the year &lt;select&gt;</span>
  <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">let</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator">&lt;=</span> <span class="token number">100</span><span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token keyword">const</span> option <span class="token operator">=</span> document<span class="token punctuation">.</span><span class="token function">createElement</span><span class="token punctuation">(</span><span class="token string">"option"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    option<span class="token punctuation">.</span>textContent <span class="token operator">=</span> year <span class="token operator">-</span> i<span class="token punctuation">;</span>
    yearSelect<span class="token punctuation">.</span><span class="token function">appendChild</span><span class="token punctuation">(</span>option<span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

<span class="token comment">// when the month or year &lt;select&gt; values are changed, rerun populateDays()</span>
<span class="token comment">// in case the change affected the number of available days</span>
yearSelect<span class="token punctuation">.</span><span class="token function-variable function">onchange</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=&gt;</span> <span class="token punctuation">{</span>
  <span class="token function">populateDays</span><span class="token punctuation">(</span>monthSelect<span class="token punctuation">.</span>value<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span>

monthSelect<span class="token punctuation">.</span><span class="token function-variable function">onchange</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=&gt;</span> <span class="token punctuation">{</span>
  <span class="token function">populateDays</span><span class="token punctuation">(</span>monthSelect<span class="token punctuation">.</span>value<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span>

<span class="token comment">//preserve day selection</span>
<span class="token keyword">let</span> previousDay<span class="token punctuation">;</span>

<span class="token comment">// update what day has been set to previously</span>
<span class="token comment">// see end of populateDays() for usage</span>
daySelect<span class="token punctuation">.</span><span class="token function-variable function">onchange</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=&gt;</span> <span class="token punctuation">{</span>
  previousDay <span class="token operator">=</span> daySelect<span class="token punctuation">.</span>value<span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span>
</pre>
</div> <div class="notecard note" id="sect12"> <p><strong>Note:</strong> Remember that some years have 53 weeks in them (see <a href="https://en.wikipedia.org/wiki/ISO_week_date#Weeks_per_year" target="_blank">Weeks per year</a>)! You'll need to take this into consideration when developing production apps.</p> </div>
</div>
<h2 id="technical_summary">Technical summary</h2>
<div class="section-content"><figure class="table-container"><div class="_table"><table class="properties"> <tbody> <tr> <td><strong><a href="#value">Value</a></strong></td> <td> A string representing a date in YYYY-MM-DD format, or empty </td> </tr> <tr> <td><strong>Events</strong></td> <td> <a href="https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/change_event"><code>change</code></a> and <a href="https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/input_event"><code>input</code></a> </td> </tr> <tr> <td><strong>Supported common attributes</strong></td> <td> <a href="../input#autocomplete"><code>autocomplete</code></a>, <a href="../input#list"><code>list</code></a>, <a href="../input#readonly"><code>readonly</code></a>, and <a href="../input#step"><code>step</code></a> </td> </tr> <tr> <td><strong>IDL attributes</strong></td> <td> <code>list</code>, <code>value</code>, <code>valueAsDate</code>, <code>valueAsNumber</code>. </td> </tr> <tr> <td><strong>DOM interface</strong></td> <td> <p><a href="https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement"><code>HTMLInputElement</code></a></p> </td> </tr> <tr> <td><strong>Methods</strong></td> <td> <a href="https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement/select"><code>select()</code></a>, <a href="https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement/stepDown"><code>stepDown()</code></a>, <a href="https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement/stepUp"><code>stepUp()</code></a> </td> </tr> <tr> <td><strong>Implicit ARIA Role</strong></td> <td><a href="https://www.w3.org/TR/html-aria/#dfn-no-corresponding-role" target="_blank"><code>no corresponding role</code></a></td> </tr> </tbody> </table></div></figure></div>
<h2 id="specifications">Specifications</h2>
<div class="_table"><table class="standard-table">
<thead><tr><th scope="col">Specification</th></tr></thead>
<tbody><tr><td><a href="https://html.spec.whatwg.org/multipage/input.html#date-state-(type=date)">HTML Standard <br><small># date-state-(type=date)</small></a></td></tr></tbody>
</table></div>
<h2 id="browser_compatibility">Browser compatibility</h2>
<div class="_table"><table>
<thead>
<tr id="bct-browser-type">
<th></th>
<th colspan="6">Desktop</th>
<th colspan="6">Mobile</th>
</tr>
<tr id="bct-browsers">
<th></th>
<th>Chrome</th>
<th>Edge</th>
<th>Firefox</th>
<th>Internet Explorer</th>
<th>Opera</th>
<th>Safari</th>
<th>WebView Android</th>
<th>Chrome Android</th>
<th>Firefox for Android</th>
<th>Opera Android</th>
<th>Safari on IOS</th>
<th>Samsung Internet</th>
</tr>
</thead>
<tbody><tr>
<th><code>date</code></th>
<td class="bc-supports-yes">20</td>
<td class="bc-supports-yes">12</td>
<td class="bc-supports-yes">57</td>
<td class="bc-supports-no">No</td>
<td class="bc-supports-yes">11</td>
<td class="bc-supports-yes">14.1</td>
<td class="bc-supports-yes">4.4</td>
<td class="bc-supports-yes">25</td>
<td class="bc-supports-yes">57</td>
<td class="bc-supports-yes">11</td>
<td class="bc-supports-yes">5</td>
<td class="bc-supports-yes">1.5</td>
</tr></tbody>
</table></div>
<h2 id="see_also">See also</h2>
<div class="section-content"><ul> <li>The generic <a href="../input"><code>&lt;input&gt;</code></a> element and the interface used to manipulate it, <a href="https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement"><code>HTMLInputElement</code></a>
</li> <li><a href="https://developer.mozilla.org/en-US/docs/Learn/Forms/HTML5_input_types#date_and_time_pickers">Date and Time picker tutorial</a></li> <li><a href="../../date_and_time_formats">Date and time formats used in HTML</a></li> <li><a href="https://developer.mozilla.org/en-US/docs/Learn/Forms/Property_compatibility_table_for_form_controls">Compatibility of CSS properties</a></li> </ul></div><div class="_attribution">
  <p class="_attribution-p">
    &copy; 2005&ndash;2023 MDN contributors.<br>Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.<br>
    <a href="https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/date" class="_attribution-link">https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/date</a>
  </p>
</div>