const depClone = (cloneObj) => { if (typeof cloneObj !== 'object') { return cloneObj } // Array instanceof Object -> true let copyObj = cloneObj instanceof Array ? [] : {} for (let key in cloneObj) { let _obj = cloneObj[key] switch (typeof _obj) { case 'object': copyObj[key] = depClone(_obj) break case 'function': copyObj[key] = _obj.bind(copyObj) break default: copyObj[key] = _obj break } } return copyObj}let obj1 = { a: 1, b: { c: 2 }, d() { console.log(this.b.c) }}let cloneObj1 = depClone(obj1)obj1.a=2obj1.b.c = 3console.log(obj1, cloneObj1)obj1.d()cloneObj1.d()
