angularjs - Angular 指令中伪代码的术语

Question

假设您有如下内容:

ng-options="item.Name for item in filters"

与 ng-options 相关的代码是否被视为 JavaScript？或者 Angular 是否使用一个术语来调用您嵌入到 HTML 指令中的代码？

Answer 1

该代码可以是很多东西。一个字符串，一个数组，一个函数。大多数时候，Angular 将其称为 Angular 表达式。查看http://docs.angularjs.org/guide/expression

来自文档:

• Context: JavaScript expressions are evaluated against the global window. In Angular, expressions are evaluated against a scope object.

• Forgiving: In JavaScript, trying to evaluate undefined properties generates ReferenceError or TypeError. In Angular, expression evaluation is forgiving to undefined and null.

• No Control Flow Statements: you cannot use the following in an Angular expression: conditionals, loops, or exceptions.

• Filters: You can use filters within expressions to format data before displaying it.