如何实现深拷贝？ about frontend-interview HOT 1 OPEN

function deepClone(origin, target) {
        var target = target || {};
        for (var prop in origin) {
            if (origin.hasOwnProperty(prop)) {
                if (typeof origin[prop] == 'object' && typeof origin[prop] !== null) {
                    if (origin[prop] instanceof Array) {
                        target[prop] = [];
                        deepClone(origin[prop], target[prop]);//递归调用deepClone
                    }
                    if (origin[prop] instanceof Object) {
                        target[prop] = {};
                        deepClone(origin[prop], target[prop]);//递归调用deepClone
                    }
                } else if (typeof origin[prop] == 'number' || typeof origin[prop] == 'string' || typeof origin[prop] == 'boolean') {
                    target[prop] = origin[prop];
                }
            }
        }
        return target;
    }