Individual skill
javascript-inline
Use when reviewing scripts, client components, bundles, or runtime behavior related to Avoid inline JavaScript. Inspect both source code and the browser execution path so fixes target the real bottleneck or bug.
skills/javascript-inline/SKILL.md
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- Last checked
- Nov 9, 2026
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- Repository last updated
- Oct 31, 2026
- License
- MIT
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- frontend Repository topic
- front-end-development Repository topic
- front-end-developer-tool Repository topic
- guidelines Repository topic
- checklist Repository topic
- reference Repository topic
- web-development Repository topic
- html Repository topic
- css Repository topic
- javascript Repository topic
- engineering Derived category
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SKILL.mdcore · 1,842 bytesSKILL.mdcore · 1,842 bytesreferences/rule.mddoc · 29,482 bytes
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# Avoid inline JavaScript
Inline JavaScript breaks browser caching, violates Content Security Policy (CSP), and creates unmaintainable spaghetti code mixing markup with behavior.
## Quick Reference
- Move onclick/onmouseover handlers to external JS files
- Use addEventListener instead of inline event handlers
- Exception: critical above-the-fold JS can be inlined
- External files enable browser caching across pages
## Check
Verify that JavaScript code is not mixed with HTML markup using external script files and proper separation of concerns for better maintainability and performance.