@teaui/react/.dist/isSame.js

React Reconciler and renderer for TeaUI

export function isSame(lhs, rhs, depth = 0) {
    if (depth >= 100) {
        return false;
    }
    if (typeof lhs !== typeof rhs) {
        return false;
    }
    if (typeof lhs === 'symbol' ||
        typeof lhs === 'string' ||
        typeof lhs === 'undefined' ||
        typeof lhs === 'boolean' ||
        typeof lhs === 'function' ||
        typeof lhs === 'number') {
        return lhs === rhs;
    }
    if (lhs === null || rhs === null) {
        return lhs === rhs;
    }
    if (lhs.constructor !== rhs.constructor) {
        return false;
    }
    if (Array.isArray(lhs)) {
        return (lhs.length === rhs.length &&
            lhs.every((value, index) => isSame(value, rhs[index], depth + 1)));
    }
    if (lhs instanceof Set) {
        if (lhs.size !== rhs.size) {
            return false;
        }
        for (const value of lhs) {
            if (!rhs.has(value)) {
                return false;
            }
        }
        return true;
    }
    if (lhs instanceof Map) {
        if (lhs.size !== rhs.size) {
            return false;
        }
        for (const [key, value] of lhs) {
            if (!rhs.has(key) || !isSame(value, rhs.get(key), depth + 1)) {
                return false;
            }
        }
        return true;
    }
    if (lhs instanceof Date) {
        return lhs.getTime() === rhs.getTime();
    }
    // ok, better be an object
    // and if it's a FiberNode, skip the _owner, it's too huge
    if ('$$typeof' in lhs || '$$typeof' in rhs) {
        const { _owner: _lhsOwner, ...lhsTrim } = lhs;
        const { _owner: _rhsOwner, ...rhsTrim } = rhs;
        return isSame(lhsTrim, rhsTrim, depth + 1);
    }
    for (const prop in lhs) {
        if (!Object.hasOwn(lhs, prop)) {
            continue;
        }
        // if rhs doesn't have the prop, or the values aren't the same
        if (!Object.hasOwn(rhs, prop) || !isSame(lhs[prop], rhs[prop], depth + 1)) {
            return false;
        }
    }
    for (const prop in rhs) {
        if (!Object.hasOwn(rhs, prop)) {
            continue;
        }
        // only need to check if lhs doesn't have the prop
        if (!Object.hasOwn(lhs, prop)) {
            return false;
        }
    }
    return true;
}
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