is not assignable to parameter of type '(value: Departments, index: number, obj: Departments[]) => booleanType 'number' is not assignable to type 'boolean'.
当我调用this.disabledButton函数时,它抛出一个错误,说“类型'() => boolean‘is not assignable to type 'boolean'”。this.onClearAllUserButton}> </Button>定义的函数:
private disabledButton= (): boolean
Type '(x: boolean) => void' is not assignable to type '(e: MouseEvent<HTMLButtonElement, MouseEvent>)Type 'MouseEvent<HTMLButtonElement, MouseEvent>' is not assignable to type 'boolean'.ts(2322)
cons
这就是问题所在:我想做一个获取参数并返回相同类型的函数。我做了一个尽可能简单的例子: type Test = <T>(arg: T) => T;
const test: Test = (arg: string) => arg; 这个简单的type Test函数实现抛出错误"Type 'T‘is not assignable to type 'string'“ 有人能解释一下为什么在不使用模板参数中的道具时会发生这个错误吗?
完成所有操作后,我得到了以下代码: private userCurrentState = new BehaviorSubject<boolean>(this.tokenAuthService.isSignedin()); 此错误消息 Argument of type 'boolean | undefined' is not assignable to parameter of type 'boolean'.
Dir(v1) // d1 is instance of Dir
let d2 = d1.add(10) // **important** d1 is still a dir (可能)实现 上面写着'T‘不能赋值给类型number,我不想把T赋值为number,但我想做的是从构造函数中推断出T。export const operatorFunc = <T extends Vect
当我在ci管道上编译时,我在控制台上得到一个错误Type 'undefined' is not assignable to type 'T'和'return void 0‘错误。await mapper(item, i) }
}
export async function findAsync<T>(items: T[], predicate: (item: T, inde