HTMLIFrameElement: width property
The width property of the HTMLIFrameElement interface returns a string that reflects the width attribute of the <iframe> element, indicating the width of the frame in CSS pixels.
Value
A string indicating the width of the frame in CSS pixels.
Examples
html
<iframe id="el" width="800" height="600"></iframe>
js
const el = document.getElementById("el");
console.log(el.width); // Output: '800'