event ( and js There's also bubbling and trapping )

<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.2/angular.js"></script> <div ng-controller="parent">parent:{{detail}}
<div ng-controller="test">
<div ng-controller="child">child:{{detail}}</div>
<button ng-click="addparent()">addparent</button>
<button ng-click="addchild()">addchild</button>
var app = angular.module('app', [])
.controller('parent', ['$scope',function($scope) {
$scope.detail =1;
$scope.detail +=1;
}); }]).controller('child', ['$scope',function($scope) {
$scope.detail =1;
$scope.detail +=1;
}); }]).controller('test', ['$scope',function($scope) {
$scope.detail =1;
$scope.detail +=1;
angular.bootstrap(document, ['app']);

As you can see from the code above $on To subscribe to an event ,$emit The event triggered will bubble to handle ,
$broadcast Triggered events capture ,
The system also has many built-in events to subscribe to , For example, whether routing is successful or not $routeChangeError and $routeChangeSuccess

ng-bind-html-unsafe( Removed from the new version , You can create a new instruction dependency ngSanitize)

<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.2/angular.js"></script>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.2/angular-sanitize.js"></script>
<div ng-controller="parent" ng-bind-html-unsafe="html"></div>
angular.module('app', ['ngSanitize']).config(['$compileProvider',
function($compileProvider) {
ngBindHtmlUnsafe: function() {
return function(scope, element, attr) {
element.addClass('ng-binding').data('$binding', attr.ngBindHtmlUnsafe);
function ngBindHtmlUnsafeWatchAction(value) {
element.html(value || '');
}]).controller('parent', ['$scope',
function($scope) {
$scope.html = "<span>aaa</span>";
angular.bootstrap(document, ['app']);

After understanding the usage of the instruction , I think it's very simple

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