HTML <param> id Attribute

An id on a <param> tag assigns an identifier to the element.

The identifier must be unique across the page.



An id attribute on a <param> tag.

<object data="/media/contract.pdf" 
  <param id="pdf-param" name="type" value="application/pdf" />

Using id

The id attribute assigns an identifier to the <param> element.

The id allows JavaScript to easily access the <param> 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.


<param 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 (.).

More Examples

A <param> element with a unique id.
Clicking the button displays the value of the parameter.

  <object data="/media/contract.pdf" width="100%" height="350">
     <param id="myparam" name="type" value="application/pdf" />
  <button onclick="show();">Show param value</button>

  let show = () => {
    let element = document.getElementById("myparam");
    alert("Value = " + element.value);

Code explanation

The id attribute assigns a unique identifier for the <param>.

Clicking the button calls JavaScript which locates the <param> using the id.

Finally, the value of the <param> is displayed in an alert box.

Browser support

Here is when id support started for each browser:

1.0 Sep 2008
1.0 Sep 2002
1.0 Aug 1995
1.0 Jan 2006
1.0 Jan 2003

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Last updated on Sep 30, 2023