AE Scripting: Array methods (forEach, IndexOf) not working in 2024?

Question

Scripts that are working in 2023 are not working for me in 2024. It appears to be some javascript array methods that are causing the issue. I wrote a simple script to test and am getting the same results: works fine in 2023, does not work in 2024 or the latest beta. This is on an M2 Macbook Pro. Not sure if this is related to AE itself or something to do with my setup. // testing script
function testForEachMethod() {
    var testArray = [1, 2, 3, 4, 5];
    var result = [];

// Using forEach to iterate over the array
    testArray.forEach(function(element, index) {
        result.push("Element " + index + ": " + element);
    });

// Display the result
    alert("forEach results:
" + result.join("
"));
}

function testIndexOf() {
    var testArray = [1, 2, 3, 4, 5];

for (var i = 1; i <= 6; i++) {
        // Loop through numbers 1-6 and use indexOf to determine if that number is in the array
        if (testArray.indexOf(i) === -1) {
            alert("Value " + i + " is not in the array.");
        } else {
            alert("Value " + i + " is in the array.");
        }
    }
}

testForEachMethod();
testIndexOf();

Douglas_Waterfall · Accepted Answer

Array.forEach is not a native ExtendScript function, so I am guessing that you were getting it for free because some other script you were using (might be a startup script) added the polyfill to the global space. You can find it here Douglas WaterfallAfter Effects Engineering

Airweb_AE · Answer

I use these polyfill in Extendscript:polyfill.jsArray.prototype.every = function(callback) {  for (var i = 0; i < this.length; i++) {    if (!callback(this[i], i, this)) {      return false;    }  }  return true;}Array.prototype.filter = function(callback) {  var arr = [];  for (var i = 0; i < this.length; i++) {    if (callback.call(this, this[i], i, this)) {      arr.push(this[i]);    }  }  return arr;}Array.prototype.forEach = function(callback) {  for (var i = 0; i < this.length; i++) {    callback(this[i], i, this);  }}Array.prototype.indexOf = function(item) {  var index = 0,    length = this.length;  for (; index < length; index++) {    if (this[index] === item)      return index;  }  return -1;}Array.prototype.map = function(callback) {  var arr = [];  for (var i = 0; i < this.length; i++) {    arr.push(callback(this[i], i, this));  }  return arr;}Array.prototype.reduce = function(callback, initialValue) {  var accumulator = initialValue;  for (var i = 0; i < this.length; i++) {    if (accumulator !== undefined) {      accumulator = callback.call(undefined, accumulator, this[i], i, this);    } else {      accumulator = this[i];    }  }  return accumulator;}Array.prototype.some = function(callback) {  for (var i = 0; i < this.length; i++) {    if (callback(this[i], i, this)) {      return true;    }  }  return false;}String.prototype.trim = function() {  return this.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, '');}

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