I'm known to using External JS library in Lightning Component but is there any way I can put a normal JS function like the on I would put in normal Visualforce such as function toggleDiv() {...}?

I'm getting error when I try to add <script>...</script> tag to Lightning Component.


Script tag blocks are not allowed in Lightning Components as they are a security risk. You should put your code in the controller, helper, or renderer as appropriate.

  • Can you give me a small sample of sort, in which I can call a JS function from controller or helper or renderer into each other? IN all the samples or documentation I encountered I noticed that we can use Controller functions in some predefined syntax and are clickable from buttons etc. I guess I'm confusing a lot :-) ... I simply want to have a JS function that will find an element via a class using jQuery and operate on it to hide or show it (like a collapsible/expandable section) ...
    – VarunC
    Sep 23 '15 at 17:48

You can add a "normal" Javascript Function to your helper file. For example if you are on a component named "foo". You can create a fooHelper.js file and add your code:

toggleDiv : function(div){
    $A.util.toggleClass(div, 'classToToggle');//you don't have to use jQuery :)

And then call this inside your controller (fooController.js):

bar : function(component, event, helper){
  • is there a way I can call a Helper function inside another helper function? Because I tried calling the function defined in helper.js and it is returning that function is not defined error in js console.
    – VarunC
    Oct 9 '15 at 18:07
  • I believe you can use this.functionName(). See this : developer.salesforce.com/forums/?id=906F00000005FHGIA2 Oct 9 '15 at 18:54
  • Thanks for comment here @moshe .. but I tried that and it worked fine but when I sue it to calla function recursively it freezes the browser window. Don't know why, same function runs fine in normal browser JS or visualforce page. My function looks like this: startClock : function() { setTimeout( this.startClock() , 1000); } also if I put Double Quotes around the function call, it does not recognize the function at all and throws error that function is not defined for this - startClock : function() { setTimeout( "this.startClock()" , 1000); }
    – VarunC
    Oct 9 '15 at 19:03
  • Hmmm interesting, maybe ask this as it's own question. Also it seems like startClock is recursively calling itself. Is this what you are trying to do? Oct 9 '15 at 19:17

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