ES6+ Summary

Modern JS Summary

ES6+ transformed JavaScript with arrow functions, classes, modules, destructuring, promises, async/await, Map/Set, optional chaining, and more. These features are all baseline-available in modern browsers.

Example

const fetchUser = async (id) => {
  const user = await fetch(`/api/users/${id}`).then(r => r.json());
  const { name, role = "user", address: { city } = {} } = user;
  return { name, role, city };
};
export default fetchUser;

JAVASCRIPT

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Pro Tip

MDN compatibility tables show exactly which ES feature lands in which browser version.

Related Resources

JavaScript Reference

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JavaScript How-To Guides

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JavaScript Exercises

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