I was studiously reading the AngularJS API reference for the ngSwitch directive when I came to that part :
当我读到这部分时，我正在认真地阅读关于ngSwitch指令的AngularJS API参考:
place an expression on the on="..." attribute (or the ng-switch="..." attribute)
将表达式放在on="…"属性(或ng-switch="…"属性)上
So of course I was wondering why there are two ways to place the expression since both of them seems to work the same way.
所以，我当然想知道为什么有两种方式来表达这个表达，因为这两种方式似乎都是相同的。
<div ng-switch="expression">
<div ng-switch on="expression">
I assume there is a reason but I do not find anything for now.
我想这是有原因的，但我现在什么也没找到。
Plunker to test : http://plnkr.co/edit/VAq1t4744bnNC6RgZtEn?p=preview
柱塞试验:http://plnkr.co/edit/vaq1t4744bnnc6rgzten?
1 个解决方案
#1
7
There is no difference. You can check the sources of ng-switch directive https://github.com/angular/angular.js/blob/master/src/ng/directive/ngSwitch.js
没有区别。您可以查看ng-switch指令的源代码，https://github.com/angular/angular/angular.js/blob/master/src/ng/directive/ngswitch.js。
var watchExpr = attr.ngSwitch || attr.on
#1
7
There is no difference. You can check the sources of ng-switch directive https://github.com/angular/angular.js/blob/master/src/ng/directive/ngSwitch.js
没有区别。您可以查看ng-switch指令的源代码，https://github.com/angular/angular/angular.js/blob/master/src/ng/directive/ngswitch.js。
var watchExpr = attr.ngSwitch || attr.on