Project Summary
a JavaScript library allowing you to use CSS3 & HTML5 while maintaining control over unsupported browsers
Modernizr is a script that will detect native CSS3 and HTML5 features available in the current UA and provide an object containing all features with a true/false value, depending on whether the UA has native support for it or not.
In addition to that, Modernizr will add classes to the element of the page, one for each cutting-edge feature. If the UA supports it, a class like cssgradients will be added. If not, the class name will be no-cssgradients. This allows for simple if-conditionals in CSS styling, making it easily to have fine control over the look and feel of your website.
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In a Nutshell, Modernizr...
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has a well established, mature codebase
maintained by a average size development team
with stable Y-O-Y commits -
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took an estimated 2 years of effort (COCOMO model)
starting with its first commit in September, 2009
ending with its most recent commit 24 days ago
Quick Reference
BSD 4-clause (University of California-Specific)
Permitted
Commercial Use
Modify
Distribute
Place Warranty
Forbidden
Hold Liable
Use Trademarks
Required
Include Copyright
Include License
These details are provided for information only. No information here is legal advice and should not be used as such.
MIT License
Permitted
Commercial Use
Modify
Distribute
Sub-License
Private Use
Forbidden
Hold Liable
Required
Include Copyright
Include License
These details are provided for information only. No information here is legal advice and should not be used as such.
Project Security
Vulnerabilities per Version ( last 10 releases )
There are no reported vulnerabilities
Project Vulnerability Report
Security Confidence Index
Vulnerability Exposure Index
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30 Day SummaryMay 17 2026 — Jun 16 2026
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12 Month SummaryJun 16 2025 — Jun 16 2026
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