ng-app V/S data-ng-app in AngularJS

StackOverflow https://stackoverflow.com/questions/21110450

문제

In AngularJS when using ng-app: ng-app found in the document will be used to define the root element to auto-bootstrap as an application.

In some of the application it is being used as data-ng-app.

Is there any difference in both of the following declaration, If Yes what & If No then which one is significant and why ?

1.

 <body ng-app>
     <p>{{ 1 + 2 }}</p>
 </body>

2.

 <body data-ng-app>
     <p>{{ 1 + 2 }}</p>
 </body>
도움이 되었습니까?

해결책

Both and are the same except for the fact that if you want your template/code to be according to be HTML compliant and follow the best practices. Use data-ng-app.

This is what the official documentation quotes:

"Best Practice: Prefer using the dash-delimited format (e.g. ng-bind for ngBind). If you want to use an HTML validating tool, you can instead use the data-prefixed version (e.g. data-ng-bind for ngBind). The other forms shown above are accepted for legacy reasons but we advise you to avoid them."

Hope that answers your question.

Cheers!

다른 팁

See the answer:

ng-app vs. data-ng-app, what is the difference?

Only diffrence regarding html5 validation

ng-app isn't strictly valid html. Custom attributes should be prefixed with data- to be valid.

So angular added this syntax so users could still have valid html. (Knockout also uses data- attributes.) There is absolutely no difference in functionality.

Source: w3.org - custom data attributes

ng-app and data-ng-app both are similar to each other, the only difference between them is sometimes HTML validators will show an error while using ng-app. so that time you can use data-ng-app.

note: x-ng-app also have the same property. You can use x-ng-app too instead of using data-ng-app.

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