A hidden attribute on a <pre> tag hides the pre element.
Although the pre element is not visible, its position on the page is maintained.
A hidden attribute on a <pre> element.
The pre-formatted text is not visible.
A hidden pre element
SELECT FirstName, LastName FROM Customer ORDER BY LastName
<p>A hidden pre element</p>
<pre hidden>
SELECT FirstName, LastName
FROM Customer ORDER BY LastName
</pre>
The hidden attribute hides the <pre> element.
You can specify either 'hidden' (without value) or 'hidden="hidden"'. Both are valid.
A hidden <pre> element is not visible, but it maintains its position on the page.
Removing the hidden attribute makes it re-appear.
<pre hidden>
<pre hidden="hidden">
| Value | Description |
|---|---|
| hidden | Use 'hidden' or hidden='hidden'. Both are valid. |
Clicking the button toggles A hidden attribute on the <pre> element.
SELECT FirstName, LastName FROM Customer ORDER BY LastName
<pre id="mypre" style="background:ghostwhite;">
SELECT FirstName, LastName
FROM Customer ORDER BY LastName
</pre>
<br />
<button onclick="toggle(this)">Hide pre</button>
<script>
let toggle = button => {
let element = document.getElementById("mypre");
let hidden = element.getAttribute("hidden");
if (hidden) {
element.removeAttribute("hidden");
button.innerText = "Hide pre";
} else {
element.setAttribute("hidden", "hidden");
button.innerText = "Show pre";
}
}
</script>
Initially, the <pre> is visible.
Clicking the button calls JavaScript which toggles A hidden attribute on the <pre> element.
Here is when hidden 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 |
