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angular.js - How to filter special characters in textarea in angularjs?

PHPz 2017-05-15 16:51:44

749

How does angularjs filter out special characters contained in textarea input content?

PHPz

學習是最好的投資！

reply all(1)

Peter_Zhu2017-05-15 16:53:44 1 floor

Define a filter yourself

For example:

html<body ng-app="app">
    <p ng-controller="main">
        <textarea ng-model="val" ng-change="cg()"></textarea>
        <p>
            原始值：<pre>{{val}}</pre>
            在HTML中使用過濾器顯示的值：<pre>{{val | replaceCode}}</pre>
            過濾后的值：<pre>{{replacedVal}}</pre>
        </p>
    </p>
    <script type="text/javascript">
    var app = angular.module('app', []);

    app.controller('main', ['$scope', 'replaceCodeFilter', function($scope, replaceCodeFilter){
        // 注意這里 可以等到你真正的需要取值的時候再去調(diào)用就可以了
        // 這里只是為了演示 所以加了 on-change
        $scope.cg = function() {
            $scope.replacedVal = replaceCodeFilter($scope.val);
        };

    }]);

    app.filter('replaceCode', function() {
        return function(val) {
            if (!val) val = '';
            return val.replace(/[#$%^&*!]/g, '');
        }
    });
    </script>
</body>

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