手写对象深度比较，判断对象内容是否相同

function isObject(obj) {
    return typeof obj == 'object' && typeof obj !== null;
}

function isEqual(obj1,obj2) {
    if ( !isObject(obj1) || !isObject(obj2)) {
        return obj1 === obj2;
    }

    if ( obj1 === obj2 ) {
        return true;
    }

    const obj1_key = Object.keys(obj1);
    const obj2_key = Object.keys(obj2);
    if ( obj1_key.length !== obj2_key.length ) {
        return false;
    }

    for(key in obj1) {
        const res = isEqual(obj1[key],obj2[key]);
        if ( !res ) {
            return false;
        }
    }
    return true;
}

let obj1 = {
    name:'obj',
    num:'0'
}

let obj2 = {
    name:'obj',
    num:'0'
}

const res = isEqual(obj1,obj2);
console.log(res); //true