js 关于对象属性是否可以用数字开头 var o = {};o.1ab = 1;//错,o['1ab']=1;//正确转载于:https://www.cnblogs.com/tangchangcai/p/7811117.html JavaScript 2023-10-24 67 点赞 1 评论 101 浏览
B继承A的写法 1.原型继承:var A=function(){ this.a=1; this.b=2; this.add=function(){ console.log(a+b); }}var B=function(){}B.prototype=new A();B.prototype.c=3;B.prototype.add=function(){ con Other 2023-10-06 61 点赞 0 评论 92 浏览