Does not use HTTP/2 for all of its resources  |  Lighthouse  |  Chrome for Developers
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Page lacks the HTML doctype, thus triggering quirks mode
Browser errors were logged to the console
Displays images with incorrect aspect ratio
Charset declaration is missing or occurs too late in the HTML
Make your page fast
Does not use HTTP/2 for all of its resources
Make your page secure
Links to cross-origin destinations are unsafe
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
Does not use HTTPS
Does not redirect HTTP traffic to HTTPS
Use a strong HSTS policy
Mitigate clickjacking with XFO or CSP
Mitigate Dom-Based XSS with Trusted Types
Create a good user experience
Requests the notification permission on page load
Requests the geolocation permission on page load
Prevents users from pasting into input fields
Does not have a viewport tag with width or initial-scale
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Uses Application Cache
Uses deprecated APIs
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Does not use HTTP/2 for all of its resources
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Save and categorize content based on your preferences.
Warning: This audit has moved into the Modern HTTP insight as of Lighthouse 13. For more information see What's new in Lighthouse 13.
HTTP/2 serves your page's resources faster
and with less data moving over the wire.
How the Lighthouse HTTP/2 audit fails
Lighthouse lists all resources not served over HTTP/2:
Lighthouse gathers all resources requested by the page
and checks the HTTP protocol version of each. There are some
cases where non-HTTP/2 requests will be ignored in the audit
results. See the implementation
for more details.
Note: Each Best Practices audit is weighted equally in the Lighthouse Best Practices
Score. Learn more in The Best Practices
score.
How to pass this audit
Serve your resources over HTTP/2.
To learn how to enable HTTP/2 on your servers,
see Setting up HTTP/2.
Resources
Source code for Does not use HTTP/2 for all of its resources audit
Introduction to HTTP/2
HTTP/2 Frequently Asked Questions
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2019-05-02 UTC.
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