What is the best way to convert a number into a formatted currency string using JavaScript?

General Discussions
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If you’re aiming for a modern and flexible way to format currency, I’d say go with Intl.NumberFormat. It’s built right into JavaScript and super handy.

function formatCurrency(amount) {
  return new Intl.NumberFormat('en-US', { style: 'currency', currency: 'USD' }).format(amount);
}

console.log(formatCurrency(2500)); // $2,500.00

This is my go-to approach when I need a reliable JavaScript format currency solution that also respects localization settings and it’s super readable too!