Typescript string to boolean

Question

I am trying to convert a string to boolean. There are several ways of doing it one way is

let input = "true";
let boolVar = (input === 'true');

The problem here is that I have to validate input if it is true or false. Instead of validating first input and then do the conversion is there any more elegant way? In .NET we have bool.TryParse which returns false if the string is not valid. Is there any equivalent in typescript?

Answer 1

You could also use an array of valid values:

const toBoolean = (value: string | number | boolean): boolean => 
    [true, 'true', 'True', 'TRUE', '1', 1].includes(value);

Or you could use a switch statement as does in this answer to a similar SO question.