css - How to select every two elements alternating? -


i select every 2 rows , alternate , repeat in pattern. how can using css?

for example....

blue rows: 1,2,5,6,9,10

red rows: 3,4,7,8

ul{    list-style-type: none;    color: white;  }  li:nth-of-type(odd){    background-color:blue;  }  li:nth-of-type(even){    background-color:red;  }
<ul>    <li>1</li>    <li>2</li>    <li>3</li>    <li>4</li>    <li>5</li>    <li>6</li>    <li>7</li>    <li>8</li>    <li>9</li>    <li>10</li>  </ul

edit: forgot add key point, sorry! repetition used in ng-repeat of unknown length go on forever. won't able explicity type every 2 in css.

the logical rules doing following.

  • select every fourth, , next one. color in red.
  • select every fourth , move 2 ahead, , next one. color in blue.

"move next one" can done using + combinator (next sibling).

ul{    list-style-type: none;    color: white;  }  li:nth-of-type(4n+3), li:nth-of-type(4n+3) + * {    background-color:blue;  }  li:nth-of-type(4n+1), li:nth-of-type(4n+1) + * {    background-color:red;  }
<ul>    <li>1</li>    <li>2</li>    <li>3</li>    <li>4</li>    <li>5</li>    <li>6</li>    <li>7</li>    <li>8</li>    <li>9</li>    <li>10</li>  </ul

or, hamms suggested in comments section below, can use 4n+1 , 4n+2 blue; , 4n+3 , 4n red.


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