typescript - How to define Object Key as String Type -

below function signature,

export function getvideobooleansparamsstring(videobooleans: {   string: { label: string; value: boolean } }): string {} 

and arg trying pass into,

const videobooleans = { video: { label: 'video', value: true } } 

and produce following error,

(63,33): error ts2345: argument of type '{ exchange: { filtertype: string; filtervalues: string[]; }; }' not assignable parameter of type '{string: filtermodel; }'.   property 'string' missing in type '{ exchange: { filtertype: string; filtervalues: string[]; }; }'. 

what intend declare object whatever key has content of { label: string; value: boolean }

the way have defined expects following:

const videobooleans = { string: { label: 'video', value: true } };  getvideobooleansparamsstring(videobooleans); 

you can define this, if want key string:

export function getvideobooleansparamsstring(videobooleans: {   [key: string]: { label: string; value: boolean } }): string { } 

or this, more specific:

export function getvideobooleansparamsstring(videobooleans: {   video: { label: string; value: boolean } }): string { } 

you can define interface, can make function signature bit cleaner:

interface myvideotype {    [key: string]: { label: string, value: true }; }  export function getvideobooleansparamsstring(videobooleans: myvideotype): string { }  const video: myvideotype = { video: { label: 'video', value: true } };  getvideobooleansparamsstring(video);