JSFiddle - React, Tailwind, and code Playground

by etianqq

HTML

<p>
静态作用域的含义是函数作用域的嵌套关系由定义时决定而不是调用时决定。又成为词法作用域，其作用域嵌套关系
</p>

JavaScript

var a = 11;
var b = 55;

function f1(){
var a =22;
this.b = 44;
f2();
}

function f2(){
alert(a+";"+this.b);
}

f1();