@renegade-fi/core/src/utils/deepEqual.ts

VanillaJS library for Renegade

/** Forked from https://github.com/epoberezkin/fast-deep-equal */

export function deepEqual(a: any, b: any) {
    if (a === b) return true;

    if (a && b && typeof a === "object" && typeof b === "object") {
        if (a.constructor !== b.constructor) return false;

        let length: number;
        let i: number;

        if (Array.isArray(a) && Array.isArray(b)) {
            length = a.length;
            if (length !== b.length) return false;
            for (i = length; i-- !== 0; ) if (!deepEqual(a[i], b[i])) return false;
            return true;
        }

        if (a.valueOf !== Object.prototype.valueOf) return a.valueOf() === b.valueOf();
        if (a.toString !== Object.prototype.toString) return a.toString() === b.toString();

        const keys = Object.keys(a);
        length = keys.length;
        if (length !== Object.keys(b).length) return false;

        for (i = length; i-- !== 0; ) if (!Object.hasOwn(b, keys[i]!)) return false;

        for (i = length; i-- !== 0; ) {
            const key = keys[i];

            if (key && !deepEqual(a[key], b[key])) return false;
        }

        return true;
    }

    // true if both NaN, false otherwise
    // biome-ignore lint/suspicious/noSelfCompare: from wagmi
    return a !== a && b !== b;
}