HTML <param> id Attribute

The id attribute on a <param> tag assigns an identifier to the object parameter element. The identifier must be unique across the page.

Example

#

An id attribute on a <param> tag.

<object data="/media/contract.pdf" 
        style="width:100%;height:350px;">
  <param id="pdf-param" name="type" value="application/pdf" />
</object>

Using id

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

The identifier must be unique across the page.

The id allows programmatic access to the <param> element.

Tip:  id is a global attribute that can be applied to any HTML element.


Syntax

<param id="identifier" />

Values

#

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.



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

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

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:

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

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