I have a code which I am trying to execute using a parameter in the function, ie -
function startFadeEffect(elem){ };
I have made the elem equal to a variable b in the global scope, where b is an array of images. Meaning -
var elem = b[imgNumb];
imgNumb is a variable which is globally "0" and inside a function is defined as
imgNumb = imgNumb + count;
Now, my current code "without" the parameter works perfect -
function startFadeEffect(){
var opacSetting = noOpac / 10;
b[imgNumb].style.opacity = opacSetting;
b[imgNumb].style.display = "block";
noOpac++;
if(noOpac < 0){
opacSetting = 0;
}
if(opacSetting == 1){
clearTimeout(timer);
b[imgNumb].style.opacity = 1;
noOpac = 0;
return false;
}
var timer = setTimeout(startFadeEffect, 75);
}
However, when I use the parameter like this it does not work for me :(
function startFadeEffect(elem){
var opacSetting = noOpac / 10;
elem.style.opacity = opacSetting;
elem.style.display = "block";
noOpac++;
if(noOpac < 0){
opacSetting = 0;
}
if(opacSetting == 1){
clearTimeout(timer);
elem.style.opacity = 1;
noOpac = 0;
return false;
}
var timer = setTimeout(startFadeEffect(elem), 75);
}
Please note I have already defined the elem variable in the global scope of the file. Also, I am only looking for a JS solution no library like JQuery! Thanks
This part is incorrect:
setTimeout(startFadeEffect(elem), 75);
It should be:
setTimeout(function () {
startFadeEffect(elem);
}, 75);
setTimeout
expects a function as it's first argument. startFadeEffect(elem)
is executed immediately (and doesn't return a function). So what happens is that startFadeEffect
calls itself recursively until opacSetting == 1
which breaks the recursion.
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