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Modern JavaScript ES2023+: async, ESM, browser and Node APIs v1.0.0

Use this resource to write, debug or optimise modern JavaScript for the browser or Node.js

New

  • 590 downloads
  • 153 likes
  • 176 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install modern-javascript-es2023

With no option, the skill goes to ~/.agents/skills/; add --agent claude-code (or codex, cursor…) to target an agent.

First time: connect the CLI with

npx --yes palatekit@latest login

The agent writes and refactors ES2023+ JavaScript, organises Promise and async/await flows, structures ESM modules, uses Web Workers and the Fetch API, and optimises browser or Node.js performance. It also reviews .js, .mjs and .cjs files for correctness.

Mostly picked by

Updated November 2, 2026

Card for the “Modern JavaScript ES2023+: async, ESM, browser and Node APIs” skill

Details

Works in
Install guides
Generates with
Your agent's model
Licence
MIT

Similar resources

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What you get

  • references/async-patterns.md and modern-syntax.md: Promises, async/await and recent syntax
  • references/modules.md, browser-apis.md, node-essentials.md: ESM modules, browser APIs and Node.js

Good fit for

  • You are refactoring an old JavaScript script into modern ESM
  • Your browser app freezes because of heavy computation

Not for

    Tags

    • javascript
    • es2023
    • esm
    • promises

    About

    You say

    “Move this hashing computation into a Web Worker and replace the callbacks with async/await.”

    Card for the “Modern JavaScript ES2023+: async, ESM, browser and Node APIs” skill

    Skill published by jeffallan under the MIT license, delivered in its original version.

    Show more

    How to use it

    1. Install the skill in your agent's skills folder
    2. Ask your agent to write, debug or optimise modern JavaScript for the browser or Node.js
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE1.1 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • references/async-patterns.md8.2 KB
    • references/browser-apis.md9.7 KB
    • references/modern-syntax.md6.2 KB
    • references/modules.md7.8 KB
    • references/node-essentials.md11.4 KB
    • SKILL.md5 KB

    Origin and licence

    Listed unmodified

    Author
    jeffallan
    Source
    github.com/jeffallan/claude-skills/tree/b7f220d32a0925c9bbfd24995e208e76bb74507c/skills/javascript-pro
    Licence
    MIT

    Notice

    « javascript-pro » (jeffallan, MIT) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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