New: 97,000+ skills indexed from GitHub repos with 100+ stars · every skill safety-checkedBrowse top skillsTop skills
Esc to closeBrowse all skills
Submit a skillBrowse skills
Submit a skillBrowse skills

Agent skill

Javascript Testing Patterns

by davila7 in davila7/claude-code-templates

Comprehensive guide for implementing robust testing strategies in JavaScript/TypeScript applications using modern testing frameworks and best practices.

MITAuto-check passedTesting & QA

Install Javascript Testing Patterns

skills CLI
$ npx skills add davila7/claude-code-templates --skill javascript-testing-patterns -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install davila7/claude-code-templates javascript-testing-patterns --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/davila7/claude-code-templates.git skills-src && mkdir -p .claude/skills && cp -r skills-src/cli-tool/components/skills/development/javascript-testing-patterns .claude/skills/javascript-testing-patterns && rm -rf skills-src

Use ~/.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/

Facts

Skill name
javascript-testing-patterns
GitHub stars
32k
Used in
11 other repos
Token cost
~336 tokens
SKILL.md length
131 words
Files
2
Skills in repo
477
Repo updated
First seen
Licence
MIT

At a glance

Comprehensive guide for implementing robust testing strategies in JavaScript/TypeScript applications using modern testing frameworks and best practices.

  • Tasks that involve Test strategy
  • SKILL.md covers Use this skill when, Do not use this skill when, Instructions and Resources
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Javascript Testing Patterns is an agent skill from davila7/claude-code-templates. Comprehensive guide for implementing robust testing strategies in JavaScript/TypeScript applications using modern testing frameworks and best practices.

Its SKILL.md is about 340 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `resources/implementation-playbook.md`).

It sits in Testing & QA, covering Test strategy. It works with JavaScript and TypeScript. The repository describes itself as: CLI tool for configuring and monitoring Claude Code. The licence is MIT.

When your agent uses it

  • Tasks that involve Test strategy

Example prompts

  • “/javascript-testing-patterns”

What it can do on your machine

Read from SKILL.md and the folder at commit 4c82aba. 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

    No URLs in SKILL.md.

    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

Javascript Testing Patterns loads about 336 tokens when it runs. Until then it costs about 45 tokens; SKILL.md has 131 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~45
When it runs · the whole SKILL.md, loaded when a task matches
~336

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 davila7/claude-code-templates at commit 4c82aba, republished under its MIT licence (© davila7). 131 words, ~336 tokens.

Download SKILL.mdSave it as .claude/skills/javascript-testing-patterns/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
javascript-testing-patterns
description
Comprehensive guide for implementing robust testing strategies in JavaScript/TypeScript applications using modern testing frameworks and best practices.
risk
safe
source
community
date_added
2026-02-27

JavaScript Testing Patterns

Comprehensive guide for implementing robust testing strategies in JavaScript/TypeScript applications using modern testing frameworks and best practices.

Use this skill when

  • Setting up test infrastructure for new projects
  • Writing unit tests for functions and classes
  • Creating integration tests for APIs and services
  • Implementing end-to-end tests for user flows
  • Mocking external dependencies and APIs
  • Testing React, Vue, or other frontend components
  • Implementing test-driven development (TDD)
  • Setting up continuous testing in CI/CD pipelines

Do not use this skill when

  • The task is unrelated to javascript testing patterns
  • You need a different domain or tool outside this scope

Instructions

  • Clarify goals, constraints, and required inputs.
  • Apply relevant best practices and validate outcomes.
  • Provide actionable steps and verification.
  • If detailed examples are required, open resources/implementation-playbook.md.

Resources

  • resources/implementation-playbook.md for detailed patterns and examples.

© davila7, 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 in cli-tool/components/skills/development/javascript-testing-patterns of davila7/claude-code-templates.

  • SKILL.md
  • resources/implementation-playbook.md

Open the folder on GitHubat commit 4c82aba

Used in 11 other repositories

We found 22 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 11 other GitHub owners. This page covers the copy in davila7/claude-code-templates, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Javascript Testing Patterns 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.

Javascript Testing Patterns compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Javascript Testing Patterns this skilldavila7/claude-code-templates32k11 repos~336Automated safety check: PassMIT
Angular TestingKilo-Org/kilo-marketplace189—~2.9kAutomated safety check: PassMIT
Apprunyysun/apprun1.2k—~1.3kAutomated safety check: PassMIT
Playwright Coretestdino-hq/playwright-skill3851 repos~1.4kAutomated safety check: PassMIT
E2E Testcrowdin/crowdin-api-client-js139—~893Automated safety check: NotesMIT
Supercovsupercorp-ai/supercov1481 repos~415Automated safety check: PassMIT

Similar skills

  • Angular Testing

    Kilo-Org/kilo-marketplace

    Write unit and integration tests for Angular v20+ applications using Vitest or Jasmine with TestBed and modern testing patterns.

    189 GitHub stars~2.9k tokensUpdated 8 days ago
    Testing & QAAuto-check passed

  • Apprun

    yysun/apprun

    AppRun architecture guidance for building, reviewing, or fixing AppRun applications and the AppRun library itself.

    1.2k GitHub stars~1.3k tokensUpdated 2 mo ago
    Testing & QAAuto-check passed

  • Playwright Core

    testdino-hq/playwright-skill

    Battle-tested Playwright patterns for writing and debugging reliable E2E, API, component, visual, accessibility, and security tests.

    385 GitHub starsUsed in 1 repo~1.4k tokens
    Testing & QAAuto-check passed

  • E2E Test

    crowdin/crowdin-api-client-js

    Run end-to-end tests against the real Crowdin or Crowdin Enterprise API using credentials from .env.

    139 GitHub stars~893 tokensUpdated 5 days ago
    Testing & QAAuto-check: notes

  • Supercov

    supercorp-ai/supercov

    Measures test coverage and code quality in a repository with the supercov CLI, and turns what it finds into small, focused tests or fixes.

    148 GitHub starsUsed in 1 repo~415 tokens
    Testing & QAAuto-check passed

  • Bun

    galfrevn/apollo

    A skill your agent uses when building, running, testing, or bundling JavaScript/TypeScript applications.

    237 GitHub stars~2k tokensUpdated 1 mo ago
    Testing & QAAuto-check: notes

More from davila7/claude-code-templates

All 477 skills in this repo

  • Perplexity Web Search

    davila7/claude-code-templates

    Runs web-grounded searches through Perplexity's Sonar models over OpenRouter for current events, recent literature and cited facts beyond the model's training cutoff.

    32k GitHub starsUsed in 12 repos~3.5k tokens
    Auto-check: notes

  • Neuropixels Data Analysis

    davila7/claude-code-templates

    Analyzes Neuropixels recordings from SpikeGLX or Open Ephys through preprocessing, drift correction, Kilosort4 spike sorting, quality metrics and curation.

    32k GitHub starsUsed in 10 repos~2.8k tokens
    Auto-check passed

  • Scientific Venue Templates

    davila7/claude-code-templates

    Supplies LaTeX templates and formatting rules for journals, conferences, posters, and grant proposals, then can check a draft against them.

    32k GitHub starsUsed in 9 repos~5.1k tokens
    Auto-check: notes

  • Brand Voice Content Creator

    davila7/claude-code-templates

    Analyzes a brand's existing writing to lock in a consistent voice, then builds SEO blog posts and platform-specific social content around it.

    32k GitHub starsUsed in 2 repos~1.9k tokens
    Auto-check passed

  • CAPA Officer

    davila7/claude-code-templates

    Guides corrective and preventive action (CAPA) work in a quality management system, from initiation and root cause analysis through effectiveness verification.

    32k GitHub starsUsed in 1 repo~2k tokens
    Auto-check passed

  • Fda Consultant Specialist

    davila7/claude-code-templates

    Senior FDA consultant and specialist for medical device companies including HIPAA compliance and requirement management.

    32k GitHub starsUsed in 1 repo~2.7k tokens
    Auto-check passed

Works with

Categories

Questions about Javascript Testing Patterns

What does Javascript Testing Patterns do?

Comprehensive guide for implementing robust testing strategies in JavaScript/TypeScript applications using modern testing frameworks and best practices. Javascript Testing Patterns is an agent skill from davila7/claude-code-templates. Comprehensive guide for implementing robust testing strategies in JavaScript/TypeScript applications using modern testing frameworks and best practices.

When should I use Javascript Testing Patterns?

Javascript Testing Patterns fits situations like: tasks that involve Test strategy.

How do I install Javascript Testing Patterns in Claude Code?

Run `npx skills add davila7/claude-code-templates --skill javascript-testing-patterns -a claude-code`. Or copy the skill folder (cli-tool/components/skills/development/javascript-testing-patterns in davila7/claude-code-templates) into .claude/skills/javascript-testing-patterns in your project. Claude Code loads it when a task matches its description.

How do I install Javascript Testing Patterns in Codex?

Run `npx skills add davila7/claude-code-templates --skill javascript-testing-patterns -a codex`. Or copy the skill folder (cli-tool/components/skills/development/javascript-testing-patterns in davila7/claude-code-templates) into .agents/skills/javascript-testing-patterns in your project. Codex loads it when a task matches its description.

Can I use Javascript Testing Patterns 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 davila7/claude-code-templates --skill javascript-testing-patterns -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/javascript-testing-patterns, .gemini/skills/javascript-testing-patterns, .github/skills/javascript-testing-patterns and .opencode/skills/javascript-testing-patterns in your project.

What does Javascript Testing Patterns need to run?

SKILL.md names no scripts, command-line tools or credentials: Javascript Testing Patterns is instructions for the agent only.

Does Javascript Testing Patterns access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Javascript Testing Patterns 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 Javascript Testing Patterns use?

Javascript Testing Patterns 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 Javascript Testing Patterns use?

About 336 tokens (SKILL.md is roughly 1.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Javascript Testing Patterns?

Skills that share tags, products or a category with Javascript Testing Patterns: Angular Testing (Kilo-Org/kilo-marketplace, 189 stars), Apprun (yysun/apprun, 1.2k stars), Playwright Core (testdino-hq/playwright-skill, 385 stars) and E2E Test (crowdin/crowdin-api-client-js, 139 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Javascript Testing Patterns?

davila7 (a GitHub user) maintains it in davila7/claude-code-templates, which has 32,432 GitHub stars. The repository holds 477 skills in this directory. The repository was last updated on October 7, 2026.

Source: davila7/claude-code-templates on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.