lingo3d/lib/engine/polyfill.js

Lingo3D is a React/Vue 3d game development framework that ships with a complete visual editor

import structuredClone from "@ungap/structured-clone";
if (!("structuredClone" in window))
    window.structuredClone = structuredClone;
function at(n) {
    // ToInteger() abstract op
    n = Math.trunc(n) || 0;
    // Allow negative indexing from the end
    if (n < 0)
        n += this.length;
    // OOB access is guaranteed to return undefined
    if (n < 0 || n >= this.length)
        return undefined;
    // Otherwise, this is just normal property access
    return this[n];
}
const TypedArray = Reflect.getPrototypeOf(Int8Array);
for (const C of [Array, String, TypedArray]) {
    if ("at" in C.prototype)
        continue;
    Object.defineProperty(C.prototype, "at", {
        value: at,
        writable: true,
        enumerable: false,
        configurable: true
    });
}
function group(callback) {
    const result = {};
    this.forEach((value, index, array) => {
        const key = callback.call(this, value, index, array);
        result[key] ??= [];
        result[key].push(value);
    });
    return result;
}
if (!("group" in Array.prototype))
    Object.defineProperty(Array.prototype, "group", {
        value: group,
        writable: true,
        enumerable: false,
        configurable: true
    });
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