Just keep in mind these tips when building aspect ratio boxes: Using aspect ratio boxes is great for all kinds of content, not just iframes. Bootstrap responsive embed can be very helpful to show responsive PDF files or videos. How to make image responsive in Bootstrap. sorry let me clarify, the iframe embeds but it is not responsive, and i get a massive pad on the bottom. How can I change an element's class with JavaScript? max-width: 100%; and height: auto; are applied to the image so that it scales with the parent element. Could very old employee stock options still be accessible and viable? In Bootstrap 4 use class='embed-responsive' instead of class='embed-responsive-item'. In Bootstrap 5 how can I style a video to stay at the bottom with centered overlay text? How to embed an swf file having controls like video/audio Tag? How can I recognize one? Technically speaking, Bootstrap Modal is a jQuery plugin (so we need jQuery) included in the Bootstrap files that we have imported in our project. You can create a ratio function thatll calculate the padding percentage needed for a particular aspect ratio, then a mixin to generate the styles. A video or image can be cropped to any size. Heres an example of the $embed-responsive-aspect-ratios list: "embed-responsive embed-responsive-16by9", "https://www.youtube.com/embed/zpOULjyy-n8?rel=0", "embed-responsive embed-responsive-21by9". Think of animgwithmax-width: 100%. LibGuides is built upon Bootstrap, a framework of CSS, JavaScript, and HTML. How to draw a truncated hexagonal tiling? Not the answer you're looking for? In Bootstrap 4 use class='embed-responsive' instead of class='embed-responsive-item'. thank youa very easy fixwith your code help..works perfect, Hi! Learn how to create responsive iframes with CSS. Avoid nasty iframe content gaps with a responsive iframe. Find centralized, trusted content and collaborate around the technologies you use most. Arbitrary ratios with any element documentation, Resize Videos Proportionally with Intrinsic Ratios, HTML Templates Are Your Best Friend My Final Page Emma Lao. Responsively embed Bootstrap webpage in an iframe Ask Question Asked 8 years, 9 months ago Modified 7 years, 11 months ago Viewed 20k times 5 I am working Example Program for Responsive video embeds