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Angular 插值字符串

<!DOCTYPE html><html><head>    <meta charset="utf-8">    <title></title>    <script src="js/angular.min.js"></script>    <script>        angular.module(myApp, []).controller(MyController, function($scope, $interpolate) {            // 设置监听            $scope.$watch(emailBody, function(body) {                if (body) {                    var template = $interpolate(body)                    $scope.previewText = template({to: $scope.to})                }            })        })    </script></head><body ng-app="myApp">    <div ng-controller="MyController">        <input ng-model="to" type="text" placeholder="Recipient">        <textarea ng-model="emailBody"></textarea>        <pre>{{ previewText }}</pre>    </div></body></html>

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Angular 插值字符串