允許對象文本，防止串

Question

以下工作：

class Foo { 
    public bar(param: {}): void { 

    } 
} 

let foo: Foo = new Foo(); 
foo.bar(""); // Ok 
foo.bar({test: ""}); // Also Ok 

是否有可能改變bar方法簽名，以便：

foo.bar({somePropertyWhichIdontKnowTheName: ""}); // Would be ok 
foo.bar(""); // Not Ok 

Answer 1

試試這個：

class Foo { 
    public bar(param: { [key: string]: any }): void { 

    } 
} 

或者：

type FooBarParams = { 
    [key: string]: any 
} 

class Foo { 
    public bar(param: FooBarParams): void { 

    } 
} 

然後：

let foo: Foo = new Foo(); 
foo.bar(""); // Error: Argument of type 'string' is not assignable to parameter of type { [key: string]: any } 
foo.bar({test: ""}); // ok