Sass @extend and Inheritance

Sass @extend directive

The @extend directive allows you to specify multiple classes for elements in HTML code without repeating them, for example: <button class="button-basic button-report">Report this</button>. You only need to specify .button-report to get two sets of styles. directive allows you to share a set of CSS properties from one selector to another.

If you have elements with almost the same style but only differ in some minor details, then The @extend directive allows you to specify multiple classes for elements in HTML code without repeating them, for example: <button class="button-basic button-report">Report this</button>. You only need to specify .button-report to get two sets of styles. directive is very useful.

The following Sass example first creates a basic style for the button (this style will be used for most buttons). Then, we create a style for the "Report" button and a style for the "Submit" button. Both the "Report" and "Submit" buttons are through The @extend directive allows you to specify multiple classes for elements in HTML code without repeating them, for example: <button class="button-basic button-report">Report this</button>. You only need to specify .button-report to get two sets of styles. The directive inherits all CSS properties of the .button-basic class. In addition, they define their own colors:

SCSS syntax:

.button-basic  {
  .button-basic, .button-report, .button-submit {
  border: none;
  padding: 15px 30px;
  text-align: center;
  font-size: 16px;
color: white;
cursor: pointer;
  @extend .button-basic;
  .button-report  {
color: white;
background-color: red;
  @extend .button-basic;
  .button-submit  {
  background-color: green;
color: white;

编译后，CSS 将如下所示：

After compilation, the CSS will be as follows:

CSS Output:
  .button-basic, .button-report, .button-submit {
  border: none;
  padding: 15px 30px;
  text-align: center;
  font-size: 16px;
color: white;
cursor: pointer;
  .button-report  {
color: white;
background-color: red;
  .button-submit  {
  background-color: green;
color: white;

} The @extend directive allows you to specify multiple classes for elements in HTML code without repeating them, for example: <button class="button-basic button-report">Report this</button>. You only need to specify .button-report to get two sets of styles. By using

The @extend directive allows you to specify multiple classes for elements in HTML code without repeating them, for example: <button class="button-basic button-report">Report this</button>. You only need to specify .button-report to get two sets of styles. The directive helps keep your Sass code very dry (DRY).