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Property 'includes' does not exist on type 'string | boolean | string[]'

I want to check if option is available in my question objects' answer property. My checkbox is as following

<Checkbox
    checked={
    question.answer.includes(option.toString())
                        ? true
                        : false
    }
    // onChange={handleChange}
/>

and my types for question onbect is as following

export type Question = {
  id: string;
  type: string;
  question: string;
  sideA?: string[];
  sideB?: string[];
  options: string[] | boolean[];
  correctAnswer: string | boolean | string[];
  answer: string | boolean | null | string[];
  isAnswered: boolean;
};
about 4 years ago · Juan Pablo Isaza
1 answers
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0

You define answer: string | boolean | null | string[], and as far as I know, includes doesn't exists on boolean nor null

about 4 years ago · Juan Pablo Isaza Report
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