详细笔记链接:https://www.jianshu.com/p/bc541afad6ee
函数内外作用域问题:
var a = 1
function f1(){
var a = 2
console.log('in:',a)//2
};f1();
console.log('out:',a)//1
详细笔记链接:https://www.jianshu.com/p/bc541afad6ee
函数内外作用域问题:
var a = 1
function f1(){
var a = 2
console.log('in:',a)//2
};f1();
console.log('out:',a)//1