ng-class-even指令在AngularJS中, 用于在HTML元素的所有均匀外观上指定CSS类。它用于在每个偶数HTML元素上动态绑定类。如果ng-class-even指令中的表达式返回true, 则仅添加该类, 否则不添加。要使ng-class-even指令有效, 必须使用ng-repeat指令。所有HTML元素都支持它。
语法如下：
<element ng-class-even="expression"> Contents... </element>例子：本示例使用ng-class-even指令选择偶数元素并应用CSS属性。
<!DOCTYPE html>
< html >
< head >
< title >ng-class-even Directive</ title >
< script src =
"https://ajax.googleapis.com/ajax/libs/angularjs/1.4.2/angular.min.js" >
</ script >
< style type = "text/css" >
.index {
color: white;
background-color: green;
}
</ style >
</ head >
< body ng-app = "app" style = "padding:20px" >
< h1 style = "color:green" >lsbin</ h1 >
< h2 >ng-class-even Directive</ h2 >
< div ng-controller = "geek" >
< table >
< thead >
< th >sorting techniques:</ th >
< tr ng-repeat = "i in sort" >
< td ng-class-even = "'index'" >
{{i.name}}
</ td >
</ tr >
</ thead >
</ table >
</ div >
< script >
var app = angular.module("app", []);
app.controller('geek', ['$scope', function ($scope) {
$scope.sort = [
{ name: "Merge sort" }, { name: "Quick sort" }, { name: "Insertion sort" }, { name: "Bubble sort" }
];
}]);
</ script >
</ body >
</ html >输出如下：
