Angular 2 - using component variables inside inner function

Question

Assuming I have the following function:

ifvisible.now("idle", function(){
            // Stop auto updating the live data
            if (this.activitySub)
            this.activitySub.unsubscribe();
            });

Since all the variables inside function() { } are not recognized, how I can import or use them inside the function (or in any other way)?

Pardeep Jain · Accepted Answer · 2016-06-25 15:50:07Z

1

try this Arrow Functions, not tested but may work for you :-

ifvisible.now("idle", () => {
  ...your code...
});

by using Arrow Functions

You don't need to keep typing function
It lexically captures the meaning of this
It lexically captures the meaning of arguments

see also

https://basarat.gitbooks.io/typescript/content/docs/arrow-functions.html

answered Jun 25, 2016 at 15:50

Pardeep Jain

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