How to make controller function execute only once in AngularJS?

Question

I have a controller that is referenced in some html. And the html changes on some event so the controller function code executes multiple times.
The problem is that I have a peace of code that needs to be executed only once.
Here is the controller:

angular.module("someModule", [dependencies])
.controller("leftBoardController", function ($scope, someService) {
   (function createFilter(dataService) {
    // here I'm loading all the data on which I want to operate after
            // this code should execute only once
    })(TempEmployeeService);
}

But it executes each time the html changes.
This is how the controller is inserted:

<section ng-controller="TreeMapController"
                 ng-class="{ 'main-container-single': zoomed }"
                 class="minContainer main-container">

Questions:
1) How to make the controller function execute only once?
2) Or is there a way I can write this peace of code that will execute only once?

what do you mean by html changes ?? do you mean part of you page as in a section mentioned above changes or the whole page changes — Abhishek Nandi
– Abhishek Nandi, Commented Jul 23, 2013 at 17:14
I think the whole page. I change the url in my code and the html changes (the page is not reloaded) — Aleksei Chepovoi
– Aleksei Chepovoi, Commented Jul 23, 2013 at 17:20
if the page is refreshed/loaded/loaded the controller will be called again- that is what is expected — Abhishek Nandi
– Abhishek Nandi, Commented Jul 23, 2013 at 17:34

Community · Accepted Answer · 2017-05-23 11:52:37Z

3

Put your "run once" code into a service, and return a promise.

Inject that service into your controller.

For an example of a service creating and then returning a promise, and the controller then using that promise, see Should services expose their asynchronicity?

edited May 23, 2017 at 11:52

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answered Jul 23, 2013 at 18:12

Mark Rajcok

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1 Comment

Aleksei Chepovoi Over a year ago

I did it with an array variable, it is more understandable for me

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