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The flex-basis CSS property sets the initial main size of a flex item. It sets the size of the content box unless otherwise set with Cssxref box-sizing .
Last updated on : 2023-02-27
Browser Versions
IE
Edge
Firefox
Chrome
Safari
Opera
Fully Supported
Partially
No Support
flex-basis on IE is fully supported on 11-11, and not supported on 5-10 IE versions.
flex-basis on Edge is fully supported on all Edge versions.
flex-basis on Firefox is fully supported on 22-112, and not supported on 2-21 Firefox versions.
flex-basis on Chrome is fully supported on 22-113, and not supported on 4-21 Chrome versions.
flex-basis on Safari is fully supported on 7-16, partially supported on null-null, and not supported on 0-6 Safari versions.
flex-basis on Opera is fully supported on 12-95, and not supported on 9-11 Opera versions.
flex-basis on Safari on iOS is fully supported on 7-16, and not supported on 3-6 Safari on iOS versions.
flex-basis on Android Browser support is currently unknown.
flex-basis on Opera Mobile is fully supported on 12-73, and not supported on 10-11 Opera Mobile versions.
flex-basis on Chrome for Android is fully supported on all Chrome for Android versions.
flex-basis on Firefox for Android is fully supported on all Firefox for Android versions.
flex-basis on Samsung Internet is fully supported on 7-19, and not supported on 4-6 Samsung Internet versions.
Data sourced from
Overall Browser Compatibility Score
Note:flex-basis shows a browser compatibility score of 88. This is a collective score out of 100 to represent browser support of a web technology. The higher this score is, the greater is the browser compatibility. The browser compatibility score is not a 100% reflection for every browser and the web technology support. However, it does give you an estimate on how much you should rely on a particular web technology in terms of browser compatibility.
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