幸运的是,我想做同样的事情。突变观察者是前进的道路,但如果您需要向后兼容旧版浏览器,您将需要比这更多的代码。
适用于 Firefox、Chrome 和 Safari 的工作插件。
Javascript:
var app = angular.module('plunker', [])
.controller('MainCtrl', function($scope) {
$scope.name = 'World';
})
.directive('watchChanges', function ($parse, $timeout) {
return function (scope, element, attrs) {
var setter = $parse(attrs.watchChanges).assign;
// create an observer instance
var observer = new MutationObserver(function (mutations) {
mutations.forEach(function (mutation) {
$timeout(function () {
var text = angular.element('<div></div>').text(element.html()).text();
setter(scope, text);
});
});
});
// configuration of the observer:
var config = {
attributes: true,
childList: true,
characterData: true,
subtree: true
};
// pass in the target node, as well as the observer options
observer.observe(element[0], config);
};
});
HTML:
<body ng-controller="MainCtrl">
<div watch-changes="text">
<p>Hello {{ name }}</p>
<label>Name</label>
<input type="text" ng-model="name" />
</div>
<pre>{{text}}</pre>
</body>