4.8. enum
<p><code>enum</code> 是枚举</p>
<pre><code>// 定义⼀个枚举
enum Color {
Red,
Blue,
Black,
Gold
}
// 定义⼀个枚举，并指定其初识数值
enum Color2 {
Red = 6,
Blue,
Black,
Gold
}
console.log(Color)
/*
{
0: 'Red',
1: 'Blue',
2: 'Black',
3: 'Gold',
Red: 0,
Blue: 1,
Black: 2,
Gold: 3
}
*/
console.log(Color2)
/*
{
6: 'Red',
7: 'Blue',
8: 'Black',
9: 'Gold',
Red: 6,
Blue: 7,
Black: 8,
Gold: 9
}
*/
// 定义⼀个phone变量，并设置对⻬进⾏限制
let phone: {name:string,price:number,color:Color}
phone = {name:'华为Mate60',price:6500,color:Color.Red}
phone = {name:'iPhone15Pro',price:7999,color:Color.Blue}
if(phone.color === Color.Red){
console.log('⼿机是红⾊的')
}</code></pre>