Source

Image replacement

Swap text for background images with the image replacement class.

The text-hide()class and mixin has been deprecated as of v4.1. It will be removed entirely in v5.

Utilize the .text-hideclass or mixin to help replace an element's text content with a background image.

<h1 class="text-hide">Custom heading</h1>

// Usage as a mixin
.heading {
  @include text-hide;
}

Use the .text-hideclass to maintain the accessibility and SEO benefits of heading tags, but want to utilize a background-imageinstead of text.

Bootstrap

<h1 class="text-hide" style="background-image: url('...');">Bootstrap</h1>