原型继承和拷贝继承备份
原型继承: function extend(Child, Parent) { var F = function(){}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.prototype.constructor = Child; Child.uber = Parent.prototype; } 浅拷贝继承: function extendCopy(p) { var c = {}; for (var i in p) { c[i] = p[i]; } c.uber = p; return c; } 深拷贝继承: function deepCopy(p,c){ var c=c||{}; for(var i in p){ if(typeof p[i]=="object"){ c[i]=(p[i].constructor=="Array")?[]:{} deepClone(p[i],c[i]) }else{ c[i]=p[i] } } return c; } var p={"name":"leyi",child:{ "cname":"zzn",schild:{ "sname":"qiezijiucai" } }} var c={} c=deepClone(p,c) p.child.cname="halo" console.info(p) console.info(c)