表达式用于将应用程序数据绑定到HTML.表达式写在双花括号内,例如{{expression}}.表达式的行为类似于ngbind指令. AngularJS表达式是纯JavaScript表达式,并输出使用它们的数据.
<p>Expense on Books : {{cost * quantity}} Rs</p>
<p>Hello {{student.firstname + " " + student.lastname}}!</p>
<p>Roll No: {{student.rollno}}</p>
<p>Marks(Math): {{marks[3]}}</p>
以下示例显示了使用上述所有表达式 :
<html> <head> <title>AngularJS Expressions</title> </head> <body> <h1>Sample Application</h1> <div ng-app = "" ng-init = "quantity = 1;cost = 30; student = {firstname:'Mahesh',lastname:'Parashar',rollno:101}; marks = [80,90,75,73,60]"> <p>Hello {{student.firstname + " " + student.lastname}}!</p> <p>Expense on Books : {{cost * quantity}} Rs</p> <p>Roll No: {{student.rollno}}</p> <p>Marks(Math): {{marks[3]}}</p> </div> <script src = "https://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"> </script> </body> </html>
在网络浏览器中打开文件 testAngularJS.htm 并查看结果.