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HTML <iframe> style Attribute

HTML <i>

HTML <img>

A style attribute on an <iframe> tag assigns a unique style to the element.

Its value is CSS that defines the appearance of the iframe element.

Example

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A style attribute on an <iframe> element.

<iframe src="https://www.wikipedia.org/wiki/Vincent_van_Gogh"
        style="border:4px solid teal;height:450px;width:100%;">
</iframe>

Using style

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The style attribute specifies the style, i.e. look and feel, of the <iframe> element.

A style contains any number of CSS property/value pairs, separated by semicolons (;).

The style attribute overrides any other style that was defined in a <style> tag or an external CSS file.

This inline styling affects the current <iframe> element only.

Syntax

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<iframe style="CSS-styles">

Values

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Value	Description
CSS-styles	One or more CSS property/value pairs separated by semicolons (;).

More Examples

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A style attribute on an <iframe> element.
Clicking the button toggles the border color.

<iframe id="myiframe"
        src="https://www.wikipedia.org/wiki/Vincent_van_Gogh"
        style="border:4px solid teal;height:450px;width:100%;">
</iframe>

<br /><br />
<button type="button" onclick="toggle();">Toggle style</button>

<script>
  let toggle = () => {
    let element = document.getElementById("myiframe");

    if (element.style.borderColor === "teal") {
       element.style.borderColor = "tomato";
    } else {
       element.style.borderColor = "teal";
    }
  }
</script>

Code explanation

The style attribute assigns a border to the <iframe> element.

Repeatedly clicking the button calls JavaScript that changes the border color.

Browser support

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Here is when style 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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