ESLint Unexpected use of isNaN

Question

I\'m trying to use the isNaN global function inside an arrow function in a Node.js module but I\'m getting this error:

[eslint] Unexpected use of \'is

Answer 1

@Andy Gaskell isNumber('1.2.3') return true, you might want to edit your answer and use Number() in place of parseFloat()

    const isEmpty = value => typeof value === 'undefined' || value === null || value === false;
    const isNumeric = value => !isEmpty(value) && !Number.isNaN(Number(value));

  console.log(isNumeric('5')); // true
  console.log(isNumeric('-5')); // true
  console.log(isNumeric('5.5')); // true
  console.log(isNumeric('5.5.5')); // false
  console.log(isNumeric(null)); // false
  console.log(isNumeric(undefined)); // false