var a=3,b=4;function h(a,b){return a+b};console.dir(h)function h(a.b)arguments: null 這個為啥是nullcaller: nulllength: 2name: "h"prototype:Object__proto__: function()<function scope>
這里打印的arguments為啥是null?
MMMHUHU
2018-09-11 14:10:08