How can I change iframe height?
John Peck
Updated on April 04, 2026
IFrame height Property
- Change the height of an iframe: getElementById(“myFrame”). height = “400”;
- Return the height of an iframe: getElementById(“myFrame”). height;
- Change the height and width of an iframe: getElementById(“myFrame”). height = “400”; getElementById(“myFrame”). width = “400”;
How do I change the size of an iframe dynamically?
The Solution Using the window. postMessage() method, we can safely communicate between the iframe and the parent window. That way, we can send a height value from the iframe to the parent window. Then, in the parent window, we can set a simple script to dynamically update the height of the iframe.
How do I create an iframe fit content?
How to create a responsive iframe?
- Create the aspect ratio box. Add a container for the iframe, determine the aspect ratio percentage, hide the overflow, and set its position to relative.
- Position the iframe. Set the width and height to 100% and absolutely position it to the top left.
- Optimize & style as needed.
How do I know if my iframe is resized?
Since the contents of the iframe has a separate window element, you can do this in a script inside of the iframe. $(window). resize(function(){ var object = $(this) // Use `object. height()` and `object.
How do you adjust the width and height of an iframe?
The width and height inside the embed code can be adjusted by changing the numbers between the quotation marks, shown below. The standard size of an iframe for desktop is a width of “560” and height of “315.”
How do I change the width and height of a video in iframe?
You plug in your aspect ratio in the padding-bottom property of the wrapper div, and it is computed by the formula: video_height / video_width * 100 . For example, a video with the 16:9 aspect ratio that gives you 9 / 16 * 100 = 56.25% .
How to keep iframe size to the content of the page?
Cross-browser jQuery plug-in. Cross-bowser, cross domain library that uses mutationObserver to keep iFrame sized to the content and postMessage to communicate between iFrame and host page. Works with or without jQuery. All solutions given thus far only account for a once off resize.
Does DOMContentLoaded work in IE6+?
The following code ports the functionality of the DOMContentLoaded event all the way back to IE6+, with a fallback to window.onload that works everywhere.
What is the use of contentWindow in iframe?
1 contentWindow : This property returns the Window object used by an iframe element, basically its defines the iframe window. 2 scrollHeight : This property defines the entire height of an element in pixels, the element is iframe. 3 scrollWidth : This property defines the entire width of an element in pixels, the element is iframe.
What is the problem with iframes?
The problem with iFrames is that you don’t always know their full height. Also, their height can change unexpectedly. When that happens, an unattractive scrollbar gets added next to the content – and the content no longer looks like it is a natural part of the parent webpage.