qq_41223276的博客

TS报错如题，纳尼？我竟然不能把number分配给全是number的枚举？解决方案：例:interface A { a : 0 | 1;}const c :A = { a: 0 };function isA(propertyA :number) :propertyA is A['a'] { return [0, 1].includes(propertyA);}const v = 1;if(isA(v)) { c.a = v;}这样就没报错啦，respect。...