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Webflow fix guide

Deprecated API Usage Heuristic on Webflow

Page may use deprecated browser APIs (e.g., document.write, synchronous XMLHttpRequest) that can degrade performance or break in future browsers.

Issue ID: TECH-DEPRECATED-API-001Severity: advisoryEffort: M

Why this matters

Page may use deprecated browser APIs (e.g., document.write, synchronous XMLHttpRequest) that can degrade performance or break in future browsers. This affects crawlability, rendering, and whether the site can be interpreted correctly by search engines.

Webflow fix path

How to fix this on Webflow

Use page settings, Designer, or project settings.

1Locate the element or setting causing the issue.
2Update it in Webflow.
3Publish and validate the output.

After you fix it

✓No deprecation warnings in Chrome DevTools Issues tab

Same fix, other platforms

Fix deprecated api usage heuristic on a different CMS

Other fixes

More Webflow fixes

Parents

Related guides

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