@a11d/equals/dist/Map.equals.js

A value equality utility library.

import { equals } from './symbol.js';
Map.prototype[equals] = function (other) {
    if (this === other) {
        return true;
    }
    if (!(other instanceof Map)) {
        return false;
    }
    if (this.size !== other.size) {
        return false;
    }
    for (const [key, value] of this) {
        if (!other.has(key)) {
            return false;
        }
        if (Object[equals](value, other.get(key)) === false) {
            return false;
        }
    }
    return true;
};