Setup a fast TDD env on browser with mocha and chai.
git clone https://github.com/fakiolinho/js-browser-tdd.git
npm i && npm start
Function to test if a number is prime:
function isPrime(x) {
if (! Number.isInteger(x)) {
return false;
}
if (x < 2) {
return false;
}
for (let i = 2; i <= Math.sqrt(x); i++) {
if (x % i === 0) {
return false;
}
}
return true;
}