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If you're using Bootstrap 3, you can use the embed-responsive class and set the padding bottom as the height divided by the width plus a little extra for toolbars. For example, to display an 8.5 by 11 PDF, use 130% (11/8.5) plus a little extra (20%).
Images. Documentation and examples for opting images into responsive behavior (so they never become larger than their parent elements) and add lightweight styles to them—all via classes. Responsive images. Images in Bootstrap are made responsive with .img-fluid.
Assign responsive-friendly margin or padding values to an element or a subset of its sides with shorthand classes. Includes support for individual properties, all properties, and vertical and horizontal properties. Classes are built from a default Sass map ranging from .25rem to 3rem.
The Bootstrap source code download includes the precompiled CSS, JavaScript, and font assets, along with source Less, JavaScript, and documentation. less/ - a preprocessor style sheet for CSS that eliminate repetitive coding tasks sass/ - a newer version of the preprocessor that is more popular.
Example. // Get the modal. var modal = document.getElementById('myModal'); // Get the image and insert it inside the modal - use its "alt" text as a caption. var img = document.getElementById('myImg'); var modalImg = document.getElementById("img01"); var captionText = document.getElementById("caption");
Images in Bootstrap 3 can be made responsive-friendly via the addition of the .img-responsive class. This applies max-width: 100%; , height: auto; and display: block; to the image so that it scales nicely to the parent element.
Create responsive images by adding an .img-responsive class to the <img> tag. The image will then scale nicely to the parent element. The .img-responsive class applies display: block; and max-width: 100%; and height: auto; to the image:
