Squarespace fix guide
Excessive JavaScript Execution Time on Squarespace
Total JavaScript execution time on the main thread is excessive, competing with rendering and user interaction handling.
Issue ID: CWV-JS-EXEC-001Severity: moderateEffort: L
Why this matters
Total JavaScript execution time on the main thread is excessive, competing with rendering and user interaction handling. 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 Lighthouse "Reduce JavaScript execution time" audit
Same fix, other platforms
Fix excessive javascript execution time on a different CMS
Other fixes
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