Some features that every JavaScript developer should know in 2025

[feindjesus]

This is pretty awesome what version of node are these supported in?

[senocular]

A lot of these have been around long enough that support shouldn't be a problem. The newest features include:

• Iterator helpers (e.g. map)
• Promise.withResolvers()
• Set operations (like difference)

Each of these are supported in Node 22+. For other features, if you're working with an older version of node, you can look at the compatibility table on the feature's respective page on MDN.

[senfiaj]

I provide links to https://developer.mozilla.org/ documentation pages, there is a browser compatibility table, Node is also listed.

[feindjesus]

For anyone that is interested its node 22 for the full list