angularjs[ngRepeat:dupes]

古城微笑少年丶 2022-03-24 16:56 164阅读 0赞

最近在开发过程中，发现一个问题，在使用angularjs的ng-repeat遍历过程中，如果遍历的数组中包含相同的项，则会抛错。

<!DOCTYPE html>
    <html ng-app="myApp">
    <head>
        <meta charset="UTF-8">
        <title>测试</title>
        <script src="http://cdn.bootcss.com/angular.js/1.4.8/angular.js"></script>
    </head>
    <body>
        <p ng-repeat="item in names">
            {
       {item}}
        </p>
        <p ng-repeat="item in ages">
            {
       {item}}
        </p>
    
        <script type="text/javascript">
        var app = angular.module('myApp', []);
        app.run(function($rootScope) {
            $rootScope.names = ['ligang', 'fenfei', 'camile'];
            $rootScope.ages = [25, 24, 25];
        });
    </script>
    </body>
    </html>
    ---------------------

抛错：

Error: \[ngRepeat:dupes\] Duplicates in a repeater are not allowed. Use  
‘track by’ expression to specify unique keys. Repeater: item in ages,  
Duplicate key: number:25, Duplicate value: 25

解决方案：在对应的ng-repeat指令中增加track by $index

转自https://blog.csdn.net/ligang2585116/article/details/50490307