```
function check(v: unknown): v is { name: string; age: number } {
if (typeof v !== 'object' || v === null) {
return false;
}
const a = v as { name: unknown; age: unknown };
if (typeof a.name !== 'string' || typeof a.age !== "number") {
return false;
}
return true;
}
```
其中 `const a = v as { name: unknown; age: unknown }` 比较丑, 怎么写才好?
function check(v: unknown): v is { name: string; age: number } {
if (typeof v !== 'object' || v === null) {
return false;
}
const a = v as { name: unknown; age: unknown };
if (typeof a.name !== 'string' || typeof a.age !== "number") {
return false;
}
return true;
}
```
其中 `const a = v as { name: unknown; age: unknown }` 比较丑, 怎么写才好?
3 条回复 • 2019-08-22 19:14:08 +08:00
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1
iugo OP 根据 https://github.com/microsoft/TypeScript/issues/31132 的记录, #21732 'Worth a try, accepting PRs'.
也许现在没什么好的解决办法, 但将来会有吧. |
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2
momocraft 2019 年 8 月 22 日  1
把这里的 unknown 改成 any，在获得 unknown 值的地方用 unknown
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