cast boolean javascript code example

Example 1: string to boolean javascript

let toBool = string => string === 'true' ? true : false;
// Not everyone gets ES6 so here for the beginners
function toBool(string){
	if(string === 'true'){
      return true;
    } else {
      return false;
    }
}

Example 2: string to boolean js

// Everyone does one extra check. Here is a better answer

let toBool = string => string === 'true'; // ? true : false;
// Not everyone gets ES6 so here for the beginners
function toBool(string){
	return string === 'true';
}

Example 3: string to boolean javascript

const stringBools = [
  'true',
  'false',
  'asdf'
];
const bools = [];

for (const i = 0; i < stringBools.length; i++) {
  const stringBool = stringBools[i];
  if (stringBool == true) {
    bools.push(true);
  } else if (stringBool == false) {
    bools.push(false);
  } else {
    bools.push(null /* Change if you like */);
  }
}