A data-* attribute on an <option> tag attaches additional data to the option item.
To create a custom attribute, replace * with a lowercase string, such as data-id, data-status, or data-location.
A custom data-price attribute on <option> elements.
The attribute values are not visible, but they are readable by JavaScript.
<select>
<option data-price="">-- Select size -- </option>
<option data-price="+$0.50">Small</option>
<option data-price="+$1.75">Medium</option>
<option data-price="+$2.25">Large</option>
</select>
The data-* attribute adds custom information to an <option> element.
The * part is replaced with a lowercase string, such as data-id, data-cost, or data-location.
An <option> element can have any number of data-* attributes, each with their own name.
Using data-* attributes reduces the need for requests to the server.
Note: The data-* attribute is not visible and does not change the appearance of the option.
<option data-*="value">
Note: The * can be any string, such as data-id, data-cost, data-supplier, etc.
| Value | Description |
|---|---|
| value | A string value. Can be numeric, alphanumeric, JSON, etc. |
A custom data-price attribute on each <option> tag.
Clicking the button will display the price value of the selected option.
<select id="selectoption">
<option data-price="">-- Select size -- </option>
<option data-price="+$0.50">Small</option>
<option data-price="+$1.75">Medium</option>
<option data-price="+$2.25">Large</option>
</select>
<br/>
<button onclick="show();">Show price</button>
<script>
let show = () => {
let element = document.getElementById("selectoption");
let price = element.options[element.selectedIndex].getAttribute("data-price");
alert("Price: " + price);
}
</script>
Each <option> tag has a custom data-price attribute.
The data-price attribute specifies the price of the <option>.
Clicking the button will display the selected <option> price.
Note: Notice how the price displays immediately without server call.
Here is when data-* support started for each browser:
 Chrome
|
1.0 | Sep 2008 |
 Firefox
|
1.0 | Sep 2002 |
 IE/Edge
|
1.0 | Aug 1995 |
 Opera
|
1.0 | Jan 2006 |
 Safari
|
1.0 | Jan 2003 |
Back to <option>
