An id on a <mark> tag assigns an identifier to the element.
The identifier must be unique across the page.
An id attribute on a <mark> tag.
Paul Cézanne was a post-impressionist painter.
<p>
Paul Cézanne was a
<mark id="post-impressionist">post-impressionist</mark>
painter.
</p>
The id attribute assigns an identifier to the <mark> element.
The id allows JavaScript to easily access the <mark> element.
It is also used to point to a specific id selector in a style sheet.
Tip: id is a global attribute that can be applied to any HTML element.
<mark id="identifier" />
Value | Description |
---|---|
identifier | A unique alphanumeric string. The id value must begin with a letter ([A-Za-z]) and may be followed by any number of letters, digits ([0-9]), hyphens (-), underscores (_), colons (:), and periods (.). |
A <mark> element with a unique id.
Clicking the button displays the content of the element.
Paul Cézanne was a post-impressionist painter.
<p>Paul Cézanne was a
<mark id="mymark">post-impressionist</mark> painter.
</p>
<br />
<button onclick="show();">Show mark content</button>
<script>
let show = () => {
let content = document.getElementById("mymark").innerHTML;
alert("Content = " + content);
}
</script>
The id attribute assigns a unique identifier for the <mark> element.
Clicking the button calls JavaScript which locates the <mark> using the id.
Finally, the content of the <mark> element is displayed in an alert box.
Here is when id support started for each browser:
Chrome
|
6.0 | Sep 2010 |
Firefox
|
4.0 | Mar 2011 |
IE/Edge
|
9.0 | Mar 2011 |
Opera
|
11.1 | Mar 2011 |
Safari
|
5.0 | Jun 2010 |
Back to <mark>