Function hasMember

hasMember<T = unknown, K extends PropertyKey = keyof T>(
    instance: unknown,
    property: K,
    verify?: boolean,
): instance is { [P in PropertyKey]: unknown } & T
Will detect if a member exists (using 'in'). Returns true if a property or method exists on the object or its prototype.
Type Parameters
- T = unknown
- K extends PropertyKey = keyof T
Parameters
- instance: unknown
- property: K
  Name of the member.
- verify: boolean = false
  When true, if the member exists but is undefined, it will return false.
Returns instance is { [P in PropertyKey]: unknown } & T
- Defined in type.ts:286