type myType = 1 | 2 | 3 | 4 | 5; let k: myType; let l: myType; let m: myType; k = 2; // 正常 l = 6; // 报错 m = 3; // 正常
typescript类型别名、限制值的大小
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type myType = 1 | 2 | 3 | 4 | 5; let k: myType; let l: myType; let m: myType; k = 2; // 正常 l = 6; // 报错 m = 3; // 正常
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