浅拷贝 与递归实现深拷贝封装

function shallowCopy(opj) {
    let newOpj = {};
    for (let el in opj) {
        newOpj[el] = opj[el]
    }
    return newOpj
}

shallowCopy({
    "name": "zhangsan",
    "age": "18"
});

function deepCopy(str, newOpj) {
    //将str深拷贝到newOpj中
    for (let key in str) {
        if (typeof str[key] == "object") {
            newOpj[key] = (str[key] instanceof Array) ? [] : {};
            deepCopy(str[key], newOpj[key])
        } else {
            newOpj[key] = str[key]
        }
    }
    return newOpj
}

// console.log(deepCopy({
//     name: "zhangsan",
//     age: 18,
//     friend: {
//         "newname": "xiaohong",
//         "newname2": "lisi"
//     }
// }, {}))

console.log(deepCopy({
    name: "zhangsan",
    age: 18,
    friend: ["xiaohong","lisi"]
}, {}))