@technobuddha/library/dist/deep-equals.js

A large library of useful functions

import { sameValue } from "./same-value.js";
/**
 * Compare two object for equality.
 *
 * ::: warning
 * Circular references are not handled, resulting in infinite recursion.
 * :::
 *
 * @param objA - First object to compare
 * @param objB - Second object to compare
 * @param exclude - Array of key names to exclude from the comparison
 * @returns true if the two objects have the same members
 * @group Object
 * @category Comparison
 */
export function deepEquals(objA, objB, exclude = []) {
    if (sameValue(objA, objB)) {
        return true;
    }
    if (objA === null || objA === undefined || objB === null || objB === undefined) {
        return false;
    }
    const hash = new Set(exclude);
    const keysA = Object.keys(objA).filter((key) => !hash.has(key));
    const keysB = Object.keys(objB).filter((key) => !hash.has(key));
    if (keysA.length !== keysB.length) {
        return false;
    }
    for (const key of keysA) {
        if (Object.prototype.hasOwnProperty.call(objB, key)) {
            if (typeof objA[key] === 'object' || typeof objB[key] === 'object') {
                return deepEquals(objA[key], objB[key], exclude);
            }
            if (!sameValue(objA[key], objB[key])) {
                return false;
            }
        }
        else {
            return false;
        }
    }
    return true;
}
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