我有一个问题如何只在一,三,四插入背景红色?jQuery addclass修改
$(function() {
$("#myid li").addClass("redcolor");
});
.redcolor {
background-color: red
}
.abcsize {
font-size: 36px
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul id="myid">
<li>One</li>
<li class="abcsize">
Two
<ul>
<li>First</li>
<li>Second</li>
</ul>
</li>
<li>Three</li>
<li>Four</li>
</ul>
':eq'选择器:https://api.jquery.com/eq-selector/ – 2017-04-20 10:25:27
':第n-child'选择:https://www.w3schools.com/jquery/sel_nthchild.asp – 2017-04-20 10:26:28