摘要: // typeof 检查获取变量的声明或者获取类型 // 用法1 检查获取变量的声明 interface People { name: string, age: number, } const me: People = {name: 'xxx', age: 25} type V = typeof m 阅读全文
posted @ 2021-12-31 18:08 Life_countdown 阅读(485) 评论(0) 推荐(0)
摘要: // ts声明简单类型 let number: number = 4 let str: string = '4' let bool: boolean = true let u: undefined = undefined // 报错 不能将u赋值为string类型 // u = 's' // und 阅读全文
posted @ 2021-12-31 14:54 Life_countdown 阅读(149) 评论(0) 推荐(0)