AngularJS’ ng-include failure problem

  node.js, question

AngularJS failed ng-include during use.

The code is as follows

<!  DOCTYPE html>
 <html lang="en">
 <head>
 <meta charset="UTF-8">
 <title>Document</title>
 <script src="http://apps.bdimg.com/libs/angular.js/1.2.15/angular.min.js"></script>
 </head>
 <body ng-app="myApp" ng-controller="A">
 <div ng-include="va">{{va}}</div>
 </body>
 </html>

The referenced code is as follows

<h1>hello world</h1>

I didn’t use GRUNT and GULP, and directly used the file loaded by the browser. I saw that the line of code that used ng-include was automatically annotated in the browser. I don’t know what the reason is, and I haven’t found it for a long time. I hope Great God can help me solve it.

Pay attention to single quotation marks. Reference to official apis:
angular expression evaluating to URL. If the source is a string constant, make sure you wrap it in single quotes, e.g. src=”‘myPartialTemplate.html'”