var a = 1, b = 2;

1.添加一個(gè)臨時(shí)變量

var t;

var t = a;

var a = b;

var b = t;

2.使用運(yùn)算符

var a = a + b -a;

var b = a + b -b;

3.把a(bǔ)變成一個(gè)數(shù)組

var a = [a,b];

var a = a[1];

var b = a[0];

4.把a(bǔ)變成一個(gè)對(duì)象

var a = {a: b, b: a};

var a = a.b;

var b = a.a;

5.var a = [b, b = a][0];

6.ES6的結(jié)構(gòu)賦值

[a, b] = [b, a];