Nested rules

Nested Rules

Sass allows CSS rules to be nested within one another. The inner rule then only applies within the outer rule’s selector. For example:

#main p {
  color: #00ff00;
  width: 97%;

  .redbox {
    background-color: #ff0000;
    color: #000000;
  }
}

is compiled to:

#main p {
  color: #00ff00;
  width: 97%; }
  #main p .redbox {
    background-color: #ff0000;
    color: #000000; }

This helps avoid repetition of parent selectors, and makes complex CSS layouts with lots of nested selectors much simpler. For example:

#main {
  width: 97%;

  p, div {
    font-size: 2em;
    a { font-weight: bold; }
  }

  pre { font-size: 3em; }
}

is compiled to:

#main {
  width: 97%; }
  #main p, #main div {
    font-size: 2em; }
    #main p a, #main div a {
      font-weight: bold; }
  #main pre {
    font-size: 3em; }

Links:

http://sass-lang.com/documentation/file.SASS_REFERENCE.html#nested_rules

doc_Sass

2016-11-11 13:09:17

Comments