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TS中使用Union Types时有哪些注意事项？ #137

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GGXXMM opened this issue Apr 15, 2023 · 0 comments
Open

TS中使用Union Types时有哪些注意事项？ #137

GGXXMM opened this issue Apr 15, 2023 · 0 comments

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@GGXXMM
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GGXXMM commented Apr 15, 2023 •
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注意事项：

当不确定一个联合类型变量具体是什么类型时，我们只能访问所有类型的公共属性或方法。示例如下：

function getString(something: string | number): string {
   return something.toString();
}
// 公共方法和属性可以访问
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