cycling through a list of colors with sass

问题

It is possible to have list of three colors:

$color-list: x y z;

And then apply these three colors by cycling through them and adding them to on an unordered list item.

I want:

<li>row 1</li> (gets color x)
<li>row 2</li> (gets color y)
<li>row 3</li> (gets color z)
<li>row 4</li> (gets color x)

and so on and so forth.

I had tried to use the @each (http://sass-lang.com/docs/yardoc/file.SASS_REFERENCE.html#each-directive) function but then it just stops applying color after the first time through the list. I want the colors to keep cycling until it runs out of list items to apply them to.

is this possible with sass?

回答1:

If its possible with pure CSS, its possible with Sass. This will work with any number of colors:

http://codepen.io/cimmanon/pen/yoCDG

$colors: red, orange, yellow, green, blue, purple;

@for $i from 1 through length($colors) {
    li:nth-child(#{length($colors)}n+#{$i}) {
        background: nth($colors, $i)
    }
}

Output:

li:nth-child(6n+1) {
  background: red;
}

li:nth-child(6n+2) {
  background: orange;
}

li:nth-child(6n+3) {
  background: yellow;
}

li:nth-child(6n+4) {
  background: green;
}

li:nth-child(6n+5) {
  background: blue;
}

li:nth-child(6n+6) {
  background: purple;
}

来源：https://stackoverflow.com/questions/15469974/cycling-through-a-list-of-colors-with-sass