@wagmi/core/dist/esm/utils/deepEqual.js

VanillaJS library for Ethereum

/** Forked from https://github.com/epoberezkin/fast-deep-equal */
export function deepEqual(a, b) {
    if (a === b)
        return true;
    if (a && b && typeof a === 'object' && typeof b === 'object') {
        if (a.constructor !== b.constructor)
            return false;
        let length;
        let i;
        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 (typeof a.valueOf === 'function' &&
            a.valueOf !== Object.prototype.valueOf)
            return a.valueOf() === b.valueOf();
        if (typeof a.toString === 'function' &&
            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: using
    return a !== a && b !== b;
}
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