Update typescript-most-practical-features-compilation.md

illacloud · Jan 25, 2024 · a5e2ec7 · a5e2ec7
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@@ -527,7 +527,9 @@ keyof any 对应的类型为 number | string | symbol，是可以做对象键的
 
 ReturnType 获取 T 类型对应的返回值类型。
 
+```typescript
 type ReturnType<T extends (...args: any) => any> = T extends (...args: any) => infer R ? R : any
+```
 
 ### Exclude