angular when to use curly brackets

Question

In angular sometimes i have seen curly brackets but some times not.i search a lot but i couldn\'t find correct question

with curly bracket

ng-src=\         


        

Answer 1

You can't write because both have different meaning see this link ,It's all about expression and template argument.

https://docs.angularjs.org/api/ng/directive/ngSrc

ng-src=template

You can find it in argument

https://docs.angularjs.org/api/ng/directive/ngHide

ng-hide=expression

You can also find it in argument