CODEWITHSUNDEEP
angularjs
michaelAdam
michaelAdam

Reputation: 1137

Why should I use '&' instead of '<' for output bindings?

What is the advantage to using '&' instead of '<' for output bindings? '<' can receive a function from the parent, which can be called by the child, passing an argument from the child's scope to the parent's.

Further, it has a much more sensible syntax: Plain JavaScript instead of AngularJS parsing the argument names and requiring you to pass arguments as elements in an object.

Upvotes: 1

Views: 38

Answers (1)

karaxuna
karaxuna

Reputation: 26940

The reason is that sometimes you want to pass other argument too, like this for example:

<directive ng-repeat="item in items" on-smth="dosmth($a, item)"></directive>

Inside directive (& binding):

scope.onSmth({ $a: internalVariable })

How would you do it with < binding?

scope.onSmth(internalVariable)

And in template:

<directive ng-repeat="item in items" on-smth="dosmth"></directive>

You can't pass additional item parameter here.

Upvotes: 1

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