• Images
    • Responsive images
      • SVG images and IE 10
  • Image thumbnails
  • Aligning images
  • Picture

    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. max-width: 100%; and height: auto; are applied to the image so that it scales with the parent element.

    Images - 图1

    1. <img src="..." class="img-fluid" alt="Responsive image">
    SVG images and IE 10

    In Internet Explorer 10, SVG images with .img-fluid are disproportionately sized. To fix this, add width: 100% \9; where necessary. This fix improperly sizes other image formats, so Bootstrap doesn’t apply it automatically.

    Image thumbnails

    In addition to our border-radius utilities, you can use .img-thumbnail to give an image a rounded 1px border appearance.

    Images - 图2

    1. <img src="..." alt="..." class="img-thumbnail">

    Aligning images

    Align images with the helper float classes or text alignment classes. block-level images can be centered using the .mx-auto margin utility class.

    Images - 图3

    1. <img src="..." class="rounded float-left" alt="...">
    2. <img src="..." class="rounded float-right" alt="...">

    Images - 图4

    1. <img src="..." class="rounded mx-auto d-block" alt="...">

    Images - 图5

    1. <div class="text-center">
    2. <img src="..." class="rounded" alt="...">
    3. </div>

    Picture

    If you are using the <picture> element to specify multiple <source> elements for a specific <img>, make sure to add the .img-* classes to the <img> and not to the <picture> tag.

    1. ​<picture>
    2. <source srcset="..." type="image/svg+xml">
    3. <img src="..." class="img-fluid img-thumbnail" alt="...">
    4. </picture>