作用域链 var a = 10; function fn(){ var b = 10 console.log(b); function fun1(){ console.log(c); b += 6; var c = 1; function fun2(){ } fun2(); } fun1(); console.log(b); } fn(); 然后fun2(),fun1(),fun()依次出栈,活动对象依次消失。 来源:CSDN作者:沐。。链接:https://blog.csdn.net/qq_44837990/article/details/103672737 标签 作用域 var