如何将 typescript 类型添加到数组到 function 参数中？

Question

I have a problem with defining array type: Code below perfectly works:

const messageCustomStyles: Array<keyof IAlertMessage> = [
            'font',
            'margin',
            'padding'
        ];
return getCustomStylesFrom(styles, 'message', messageCustomStyles);

what I want to do is to move this array into function argument with its type, like so:

return getCustomStylesFrom(
  styles, 
  'message', 
  ['font', 'margin', 'padding']: Array<keyof IAlertMessage>);

But this throws ts error saying 'Expected 3 arguments, but got 4.' Looks like after ':' it is counting type as a new parameter.

How can I fix this?

Answer 1

You can do it like this:

return getCustomStylesFrom(
  styles, 
  'message', 
  ['font', 'margin', 'padding'] as Array<keyof IAlertMessage>);