CODEWITHSUNDEEP
meteormeteor-tracker
bigmadwolf
bigmadwolf

Reputation: 3519

Meteor.autorun vs Tracker.autorun?

What is the difference between Meteor.autorun and Tracker.autorun?

I'm well aware of the difference in using this.autorun in template lifecycle callbacks, but have seen these two used interchangeably and just want to be sure I haven't missed a trick.

Upvotes: 9

Views: 2479

Answers (2)

Andreas Chatzivasileiadis
Andreas Chatzivasileiadis

Reputation: 659

Try to run Meteor.autorun(); in the console, it throws the following error Uncaught Error: Tracker.autorun requires a function argument like you were trying to run Tracker.autorun();

Upvotes: 0

Kyll
Kyll

Reputation: 7139

Well, it can easily be found out with the identity operator.

This will be false because it is not the same function:

(function() {} === function() {})

Let's try with the two autorun :

(Meteor.autorun === Tracker.autorun)

This returns true. So yes it's only a pure alias.
However, only Tracker.autorun is documented. I suspect some kind of old API left for compatibility...
Let's check some Meteor code on GitHub!

File : deprecated.js

Meteor.autorun = Tracker.autorun;

This is in deprecated.js, it says some things about //Deprecated functions and some backward compatibility with Meteor 0.5.4. It seems pretty clear which one you should use.
You can find some other old timers in there, such as Deps...

Upvotes: 16

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