ES6+ Features in JavaScript — a practical guide to ES6+ JavaScript features with clear examples you can reuse in real projects.
JavaScript Tutorial Series (90/101). Prefer one article? Read the complete JavaScript tutorial.
Short description
Check target environments before using the newest syntax untranspiled.
Modern syntax
const city = user?.address?.city ?? 'Unknown';
const nums = [1, 2, 3].with?.(0, 99); // newer APIs vary by support