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A skill your agent uses when reviewing scripts, client components, bundles, or runtime behavior related to Use ES modules (import/export).
MITAuto-check passed
Install Es Modules
$ npx skills add thedaviddias/Front-End-Checklist --skill es-modules -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install thedaviddias/Front-End-Checklist es-modules --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/es-modules .claude/skills/es-modules && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "es-modules" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/es-modules into .claude/skills/es-modules/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "es-modules", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/es-modulesType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add thedaviddias/Front-End-Checklist --skill es-modules -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install thedaviddias/Front-End-Checklist es-modules --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/es-modules .agents/skills/es-modules && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "es-modules" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/es-modules into .agents/skills/es-modules/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "es-modules", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add thedaviddias/Front-End-Checklist --skill es-modules -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install thedaviddias/Front-End-Checklist es-modules --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/es-modules .cursor/skills/es-modules && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "es-modules" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/es-modules into .cursor/skills/es-modules/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "es-modules", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/thedaviddias/Front-End-Checklist.git --path skills/es-modules--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add thedaviddias/Front-End-Checklist --skill es-modules -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install thedaviddias/Front-End-Checklist es-modules --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/es-modules .gemini/skills/es-modules && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "es-modules" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/es-modules into .gemini/skills/es-modules/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "es-modules", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install thedaviddias/Front-End-Checklist es-modulesInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add thedaviddias/Front-End-Checklist --skill es-modules -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/es-modules .github/skills/es-modules && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "es-modules" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/es-modules into .github/skills/es-modules/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "es-modules", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add thedaviddias/Front-End-Checklist --skill es-modules -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install thedaviddias/Front-End-Checklist es-modules --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/es-modules .opencode/skills/es-modules && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "es-modules" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/es-modules into .opencode/skills/es-modules/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "es-modules", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
es-modules- GitHub stars
- 74k
- Token cost
- ~482 tokens
- SKILL.md length
- 194 words
- Files
- 2 (incl. references)
- Skills in repo
- 390
- Repo updated
- First seen
- Licence
- MIT
At a glance
A skill your agent uses when reviewing scripts, client components, bundles, or runtime behavior related to Use ES modules (import/export).
- Reviewing scripts
- SKILL.md covers Quick Reference, Check, Fix and Explain, plus 1 more section
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Client components
What it does
Es Modules is an agent skill from thedaviddias/Front-End-Checklist. Use when reviewing scripts, client components, bundles, or runtime behavior related to Use ES modules (import/export). Inspect both source code and the browser execution path so fixes target the real bottleneck or bug.
Its SKILL.md is about 480 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/rule.md`).
The repository describes itself as: 🗂 The essential checklist for modern web development, for humans and AI agents. The licence is MIT.
When your agent uses it
- Reviewing scripts
- Client components
- Runtime behavior related to Use ES modules (import/export)
Example prompts
- “/es-modules”
What it can do on your machine
Read from SKILL.md and the folder at commit e8d14d0. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
frontendchecklist.io
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Es Modules loads about 482 tokens when it runs, and up to ~1.3k if it reads all its reference files. Until then it costs about 57 tokens; SKILL.md has 194 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from thedaviddias/Front-End-Checklist at commit e8d14d0, republished under its MIT licence (© thedaviddias). 194 words, ~482 tokens.
Download SKILL.mdSave it as
.claude/skills/es-modules/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- es-modules
- description
- Use when reviewing scripts, client components, bundles, or runtime behavior related to Use ES modules (import/export). Inspect both source code and the browser execution path so fixes target the real bottleneck or bug.
- metadata.category
- javascript
- metadata.priority
- high
- metadata.difficulty
- beginner
- metadata.estimatedTime
- 15
- metadata.source
- frontendchecklist.io
- metadata.url
- https://frontendchecklist.io/rules/javascript/es-modules
Use ES modules (import/export)
ES modules are statically analyzable — bundlers can determine at build time what code is actually used and eliminate the rest (tree-shaking). CommonJS require() is dynamic and prevents this optimization. ES modules are also the browser-native standard, reducing the need for build-time transformation.
Quick Reference
- Use import/export syntax instead of require()/module.exports
- Named exports improve IDE autocompletion and enable tree-shaking
- Add type="module" to script tags or use a bundler to load ES modules in browsers
- Default exports are fine but named exports scale better in large codebases
Check
Identify any use of require(), module.exports, or exports in this JavaScript file that should be converted to ES module syntax.
Fix
Convert all require() and module.exports statements to ES module import/export syntax.
Explain
Explain the benefits of ES modules over CommonJS, including tree-shaking, static analysis, and browser support.
Code Review
Review scripts, client components, and browser execution paths related to Use ES modules (import/export). Flag exact imports, event handlers, runtime side effects, or blocking operations that violate the rule, and state how the change should be verified in the browser.
For full implementation details, code examples, and framework-specific guidance,
see references/rule.md.
Rule page: https://frontendchecklist.io/rules/javascript/es-modules
© thedaviddias, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file (references) in skills/es-modules of thedaviddias/Front-End-Checklist.
- SKILL.md
- references/rule.md
Open the folder on GitHubat commit e8d14d0
Compare with similar skills
Es Modules next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Es Modules this skillthedaviddias/Front-End-Checklist | 74k | — | ~482 | Automated safety check: Pass | MIT | |
| Triage Support Bundlenetdata/netdata | 81k | — | ~2.7k | Automated safety check: Pass | GPL-3.0 | |
| Module Set PluginizationJetBrains/intellij-community | 21k | — | ~4.3k | Automated safety check: Pass | Custom licence | |
| Splitting Oversized ModulesPostHog/posthog | 40k | — | ~2.2k | Automated safety check: Pass | Custom licence | |
| Abp Moduleabpframework/abp | 14k | — | ~1.6k | Automated safety check: Pass | LGPL-3.0 | |
| Extract ModuleJetBrains/intellij-community | 21k | — | ~5.2k | Automated safety check: Pass | Custom licence |
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Split an oversized Python module (a thousand-plus-line logic.py, models.py, api.py, or its test file) into a package of one module per concern, mechanically and provably without changing behavior.
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Module Dependencies
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Add or modify IntelliJ module dependencies in .iml files. An agent skill from JetBrains/intellij-community.
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Questions about Es Modules
What does Es Modules do?
A skill your agent uses when reviewing scripts, client components, bundles, or runtime behavior related to Use ES modules (import/export). Es Modules is an agent skill from thedaviddias/Front-End-Checklist. Use when reviewing scripts, client components, bundles, or runtime behavior related to Use ES modules (import/export).
When should I use Es Modules?
Es Modules fits situations like: reviewing scripts; client components; runtime behavior related to Use ES modules (import/export).
How do I install Es Modules in Claude Code?
Run `npx skills add thedaviddias/Front-End-Checklist --skill es-modules -a claude-code`. Or copy the skill folder (skills/es-modules in thedaviddias/Front-End-Checklist) into .claude/skills/es-modules in your project. Claude Code loads it when a task matches its description.
How do I install Es Modules in Codex?
Run `npx skills add thedaviddias/Front-End-Checklist --skill es-modules -a codex`. Or copy the skill folder (skills/es-modules in thedaviddias/Front-End-Checklist) into .agents/skills/es-modules in your project. Codex loads it when a task matches its description.
Can I use Es Modules in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add thedaviddias/Front-End-Checklist --skill es-modules -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/es-modules, .gemini/skills/es-modules, .github/skills/es-modules and .opencode/skills/es-modules in your project.
What does Es Modules need to run?
SKILL.md names no scripts, command-line tools or credentials: Es Modules is instructions for the agent only.
Does Es Modules access the network?
SKILL.md names 1 domain. As links in the text: frontendchecklist.io. This is read from the text; nothing was executed.
Is Es Modules safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Es Modules use?
Es Modules is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Es Modules use?
About 482 tokens (SKILL.md is roughly 1.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 781 tokens, read only when the agent opens those files.
What are the alternatives to Es Modules?
Skills that share tags, products or a category with Es Modules: Triage Support Bundle (netdata/netdata, 81k stars), Module Set Pluginization (JetBrains/intellij-community, 21k stars), Splitting Oversized Modules (PostHog/posthog, 40k stars) and Abp Module (abpframework/abp, 14k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Es Modules?
thedaviddias (a GitHub user) maintains it in thedaviddias/Front-End-Checklist, which has 74,412 GitHub stars. The repository holds 390 skills in this directory. The repository was last updated on October 6, 2026.
Source: thedaviddias/Front-End-Checklist on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.