AngularJs or JavaScript Wait For Some Condition

Question

At one line of my code I have something like that:

...
while(!$scope.isMyTurn(privilege)){}
I will run next line of codes

However as usual it blocks my browser. I have to wait until get true to run next line of codes. I don't want to block my browser and other functionalities should work because(some of other fired events will change the situation of my turn) User should continue whatever he does.

This is for refreshing a graphic until my turn is come.

@ShaiRez I have solved problem with classical Javascript way but I am looking to implement it with $watch — kamaci
– kamaci, Commented Feb 18, 2013 at 6:42

Ganaraj · Accepted Answer · 2013-02-15 16:40:40Z

7

You should be doing it something like :

$scope.$watch("isMyTurn(privilege)",function(val){
    if(val){
       //I will run next line of codes
    }
});

instead of what you are attempting to do.. Note that in this scenario, privilege should also be a scope variable something like

$scope.privilege

If you dont want it to be a scope variable just dont pass it as an argument. but directly access it inside the function..

Hope this helps..

edited Feb 15, 2013 at 16:40

answered Feb 15, 2013 at 12:00

Ganaraj

26.8k6 gold badges68 silver badges60 bronze badges

Sign up to request clarification or add additional context in comments.

5 Comments

kamaci Over a year ago

I have solved it via classical Javascript way but it is better to do it with Angular Js built in functionalities. Can you explain that val variable and how can I change the frequency to check next watch time?

kamaci Over a year ago

privilege is not a scope variable bu it is a defined variable however I get undefined for it?

Ganaraj Over a year ago

the proper syntax for scope.$watch is $scope.$watch("isMyTurn(privelege)",function(newVal,oldVal){ if(newVal !== undefined ){ //do your stuff here... } }); I believe you already know that angular works with dirty checking.. So when the value of the watch expression changes, angular calls that call back function providing you the new value and the old value of that expression.. How many times this function is called is not guaranteed, so you should not rely on it..

kamaci Over a year ago

I use $scope.$watch and doesn't work? I can not directly use privilege variable because the function will use it at another js file?

Ganaraj Over a year ago

can you create a fiddle recreating your problem? Then it would be much easier to solve it and show you the solved problem..

Shai Reznik - HiRez.io · Accepted Answer · 2013-02-15 08:32:08Z

5

Consider using the $scope.$watch function.

Look under ($watch): http://docs.angularjs.org/api/ng.$rootScope.Scope

answered Feb 15, 2013 at 8:32

Shai Reznik - HiRez.io

9,0082 gold badges37 silver badges34 bronze badges

Comments

PiTheNumber · Accepted Answer · 2013-02-15 15:35:51Z

1

I don't know about angularJS but in normal JavaScript you could use setTimeout

function whenReady()
{
  if ($scope.isMyTurn(privilege)){
    I will run next line of codes
  }
  else
  {
    window.setTimeout(whenReady, 1000);
  }
}
window.setTimeout(whenReady, 1000);

edited Feb 15, 2013 at 15:35

answered Feb 15, 2013 at 8:31

PiTheNumber

23.7k17 gold badges114 silver badges191 bronze badges

Collectives™ on Stack Overflow

AngularJs or JavaScript Wait For Some Condition

3 Answers 3

5 Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

5 Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related