Trying to implement a JavaScript function to run only once has proven to be quite a challenge for me. Despite exploring previously asked questions like Function in javascript that can be called only once, none of the suggested solutions seem to work for me. I suspect that the issue may be related to the presence of nested functions or some crucial detail escaping my attention. The desired functionality involves triggering a function upon scrolling a webpage which includes running a brief animation on a canvas within the header, reducing the header's size, and maintaining it in that state.
Unfortunately, the problem persists as subsequent scrolling events lead to the re-execution of the animation. Below is an abridged snippet of the code that fails to deliver the desired outcome:
$(document).on("scroll",function(){
var arrange_title = function(){
//some code
};
if($(document).scrollTop()>0){
arrange_title();
arrange_title = function(){};
setTimeout(function(){
$("header").removeClass("large").addClass("small");
},1000);
}
});
Alternative attempts, such as declaring a global variable, initializing it to "false" within a "window.onload" function, and subsequently setting it to true within a conditional statement triggering the animation, have also proven ineffective in preventing the repeated execution of the function. Any insights or suggestions would be greatly appreciated.