An id on a <code> tag assigns an identifier to the code element.
The identifier must be unique across the page.
An id attribute on a <code> tag.
In JavaScript the alert()
method displays an alert box.
<p>
In JavaScript the <code id="alert-code">alert()</code>
method displays an alert box.
</p>
The id attribute assigns an identifier to the <code> element.
The id allows JavaScript to easily access the <code> 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.
<code id="identifier">
| Value | Description |
|---|---|
| identifier | A unique alphanumeric string. The id value must begin with a letter ([article-Zarticle-z]) and may be followed by any number of letters, digits ([0-9]), hyphens (-), underscores (_), colons (:), and periods (.). |
A <code> tag with a unique id.
Clicking the button will toggle the boldness of the code.
In JavaScript the alert()
method displays an alert box.
<p>
In JavaScript the <code id="mycode">alert()</code>
method displays an alert box.
</p><br/>
<button onclick="toggle();">Toggle boldness</button>
<script>
let toggle = () => {
let element = document.getElementById("mycode");
if (element.style.fontWeight === "bold") {
element.style.fontWeight = "normal";
} else {
element.style.fontWeight = "bold";
}
}
</script>
The id attribute assigns a unique identifier to the <code> element.
Clicking the button calls JavaScript which locates the <code> using the id.
It then toggles a bold style on the <code> element.
Here is when id 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 <code>
