Squarespace fix guide
Significant Unused JavaScript on Squarespace
A large portion of downloaded JavaScript is never executed during page load. This wastes bandwidth and increases parse/compile time.
Issue ID: CWV-UNUSED-JS-001Severity: moderateEffort: M
Why this matters
A large portion of downloaded JavaScript is never executed during page load. This wastes bandwidth and increases parse/compile time. This affects load speed, Core Web Vitals, and how many visitors stay long enough to convert.
Squarespace fix path
How to fix this on Squarespace
Check page settings, navigation, and code injection.
- 1Identify whether this is page-level or site-level.
- 2Apply the fix.
- 3Republish and confirm.
After you fix it
- ✓Check Coverage tab in DevTools and confirm unused JS is reduced
Same fix, other platforms
Fix significant unused javascript on a different CMS
Other fixes
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