I encountered some confusion when learning instructions today:
<!DOCTYPE html>
<html ng-app="app">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title></title>
<link rel="stylesheet" href="../css/lib/bootstrap4.css">
<script type="text/javascript" src='../js/lib/angular.js' ></script>
<script type="text/javascript" src='js/scope2.js'></script>
</head>
<body>
<p ng-init = 'someProperty="some date"'>
<p ng-init='siblingProperty="moredata"'>
Inside p Two : {{aThirdProperty}}
<p ng-init="aThirdProperty='data for 3rd property'" ng-controller="someCtrl">
Inside p Three: {{aThirdProperty}}
<p ng-controller="secondCtrl">
Inside p Four: {{aThirdProperty}}
<br>
OutSide myDirective: {{myProperty}}
<p my-directive ng-init="myProperty='wow! that is cool'">
Inside myDirective : {{myProperty}}
</p>
</p>
</p>
</p>
</p>
</body>
</html>js
var app = angular.module('app', []);
app.controller('someCtrl', ['$scope', function($scope){
}])
app.controller('secondCtrl', ['$scope', function($scope){
console.log($scope.myProperty) //undefined
}])
app.directive('myDirective',function(){
return {
restrict :'A',
scope:false
}
})Why is undefined printed?
Then change the scope in the js command to scope:{}; Why does this pop up? In other words, why does the OutSide myDirective: wow! that is cool outside have value?
Inside p Two :
Inside p Three: data for 3rd property
Inside p Four: data for 3rd property
OutSide myDirective: wow! that is cool
Inside myDirective : wow! that is cool
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
First of all, what you wrote has little to do with instructions. The scope of the instruction's
scope是影响它的templateis not here.The reason for undefined here is because the controller is executed before ng-init. You can use delay or
$watchmonitorWell,,, I understand the undefined above, but I am still a little confused about the latter one, that is to say, when
scope:{}时，Inside myDirective : {{myProperty}}这个表达式还是属于外面那个作用域是不是？而此时template里面并没有设定，，，所以隔离作用域就没有起作用，我这样理解对吗？还有一个问题，既然这样，，，那为什么如果把scope设定为
scope:trueis the following result:Can you give me some more advice? Thank you~~
scope true is an independent and isolated scope
{}, only the properties inside {} will be isolated