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Javascript in Firefox Plugin: Delay in for loop

Answer 1

+1 A:

I'm not convinced that this type of foolery is necessary but I'm not an extension dev so who knows. If this is the approach you want, then just have the setTimeout call refer to the same function:

var index;
firstfunction: function() {
  // do something with `index` and increment it when you're done

  // check again in a few seconds (`index` is persisted between calls to this)
  setTimeout("firstfunction", 5000);
}

Michael Haren 2009-11-02 02:37:39

Thanks for that... Just that I was looking for some approach that does not use the setTimeout which is a very risky function. For instance, if the page takes more than 5 seconds to load, the code will break...

Legend 2009-11-02 02:39:30

You can call it multiple times. I think you're hunch that this approach is wrong is right, though, I don't know much about this area--sorry!

Michael Haren 2009-11-02 02:40:29

Answer 2

+1 A:

I am not sure how to do this from a plugin, but what I've done with iframes in the past is attach a callback to the target document's onLoad event.

Maybe something like:

var index = 0;  
var urls = [ ..... ];  
function ProcessDocument() { ....; LoadNextDocument(); }  
function LoadNextDocument() { index++; /* Load urls[index] */; }  
document.body.onLoad = ProcessDocument;

Somewhere in there you'd need to test for index > urls.length too for your end condition.

James Maroney 2009-11-02 02:39:45

Answer 3

A:

I had same problem but I used recursion instead of looping. Below is the running code which changes the innerHTML of an element by looping through the list. Hope its helpful.

<Script type="text/javascript">
var l;
var a;
function call2()
{
    l = document.getElementById('listhere').innerHTML;
    a = l.split(",");
    call1(0);
}

function call1(counter)
{
    if(a.length > counter)
    {
        document.getElementById('here').innerHTML = a[counter];
        counter++;
        setTimeout("call1("+counter+")",2000);
    }
}

</Script>

    <body onload="call2()">
    <span id="listhere">3,5,2,8</span><Br />
    <span id="here">here</span>

Deepak Yadav 2010-08-17 15:58:09

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Javascript in Firefox Plugin: Delay in for loop

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