Question

How can I convert a string either like ‘helloThere’ or ‘HelloThere’ to ‘Hello There’ in JavaScript?

Answer 1

const text = 'helloThereMister';
const result = text.replace(/([A-Z])/g, " $1");
const finalResult = result.charAt(0).toUpperCase() + result.slice(1);
console.log(finalResult);

capitalize the first letter – as an example. Note the space in " $1".

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Here’s a typescript function that does it as well:

function camelCaseToWords(s: string) {
  const result = s.replace(/([A-Z])/g, ' $1');
  return result.charAt(0).toUpperCase() + result.slice(1);
}

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Of course, in case the first letter is already capital – you would have a spare space to remove.