Comprehensive JavaScript reference covering 33+ essential concepts every developer should know. From fundamentals like primitives and closures to advanced patterns like async/await and functional programming. Use when explaining JS concepts, debugging JavaScript issues, or teaching JavaScript fundamentals.
Install
npx skills add davila7/claude-code-templates --skill javascript-masterynpx skills add davila7/claude-code-templates --skill javascript-mastery -a claude-code -gnpx skills add davila7/claude-code-templates --skill javascript-mastery -a codex -ggemini skills install https://github.com/davila7/claude-code-templates.git --path cli-tool/components/skills/development/javascript-masterygh skill install davila7/claude-code-templates javascript-masterygit clone --depth 1 https://github.com/davila7/claude-code-templates /tmp/davila7__claude-code-templates
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/davila7__claude-code-templates/cli-tool/components/skills/development/javascript-mastery ~/.claude/skills/javascript-mastery # Claude Code
cp -R /tmp/davila7__claude-code-templates/cli-tool/components/skills/development/javascript-mastery ~/.agents/skills/javascript-mastery # Codex, Cursor, Gemini CLI, Copilot, OpenCode