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Dataset 20260827-2142-2f1b575 · measured 2026-08-27 21:42 UTC
flex
✕parsed, no effectcss-flexbox-2
The parser accepts the name, yet our rendering is byte-identical with and without the declaration while Chrome's is not. The declaration is being swallowed.
What the specification says
- Initial value
- 0 1 auto
- Applies to
- flex items
- Inherited
- no
- Percentages
- see individual properties
- Computed value
- see individual properties
- Syntax
- none | [ <'flex-grow'> <'flex-shrink'>? || <'flex-basis'> ]
The measurements
Each example is one declaration on a small page, drawn by Chrome and by our engine. Drag the handle to wipe between them.
flex:2✓pixel-exact
Our renderChromeIdentical to Chrome: nothing differs, so there is no difference map to show.
- Differing pixels
- 0
- Max channel delta
- 0
flex:2 2✓pixel-exactOur renderChromeIdentical to Chrome: nothing differs, so there is no difference map to show.
- Differing pixels
- 0
- Max channel delta
- 0
flex:content✓pixel-exactOur renderChromeIdentical to Chrome: nothing differs, so there is no difference map to show.
- Differing pixels
- 0
- Max channel delta
- 0
flex:min-content✓pixel-exact
Our renderChromeIdentical to Chrome: nothing differs, so there is no difference map to show.
- Differing pixels
- 0
- Max channel delta
- 0
flex:max-content✓pixel-exactOur renderChromeIdentical to Chrome: nothing differs, so there is no difference map to show.
- Differing pixels
- 0
- Max channel delta
- 0
flex:fit-content✓pixel-exactOur renderChromeIdentical to Chrome: nothing differs, so there is no difference map to show.
- Differing pixels
- 0
- Max channel delta
- 0
flex:none✓pixel-exact
Our renderChromeIdentical to Chrome: nothing differs, so there is no difference map to show.
- Differing pixels
- 0
- Max channel delta
- 0
flex:20px✓pixel-exact
Our renderChromeIdentical to Chrome: nothing differs, so there is no difference map to show.
- Differing pixels
- 0
- Max channel delta
- 0
flex:stretch✕parsed, no effect
Our renderChrome1,120 pixels differ from Chrome, the largest by 153 of 255 on one channel.
- Differing pixels
- 1,120
- Max channel delta
- 153
flex:50%✓pixel-exact
Our renderChromeIdentical to Chrome: nothing differs, so there is no difference map to show.
- Differing pixels
- 0
- Max channel delta
- 0
flex:auto✓pixel-exact
Our renderChromeIdentical to Chrome: nothing differs, so there is no difference map to show.
- Differing pixels
- 0
- Max channel delta
- 0
flex:2 0.4✓pixel-exact
Our renderChromeIdentical to Chrome: nothing differs, so there is no difference map to show.
- Differing pixels
- 0
- Max channel delta
- 0
Which values were measured
“Supported” on one example means “supported at the value we tried”. The property’s declared grammar has 12 branches; 11 of them carry a measurement. The publishing ceiling is 12 examples per property — a branch past it is left out by our choice, not by accident.
| Value | Measured |
|---|---|
| 2 | ✓pixel-exact |
| 2 2 | ✓pixel-exact |
| content | ✓pixel-exact |
| 20px | ✓pixel-exact |
| 50% | ✓pixel-exact |
| min-content | ✓pixel-exact |
| max-content | ✓pixel-exact |
| stretch | ✕parsed, no effect |
| fit-content | ✓pixel-exact |
| contain | not measured |
| none | ✓pixel-exact |
| auto | ✓pixel-exact |
Tests in the suite that name this property
Secondary evidence: 101 Web Platform Tests carry a spec anchor pointing at this property. Only 1,254 tests in the whole corpus carry such an anchor, so an empty list here means nothing at all.
✓css/css-flexbox/flex-001.htm✓css/css-flexbox/flex-002.htm✓css/css-flexbox/flex-003.htm✓css/css-flexbox/flex-004.htm✓css/css-flexbox/flex-vertical-align-effect.html✓css/css-flexbox/flexbox_flex-0-0-0-unitless.html✓css/css-flexbox/flexbox_flex-0-0-0.html✓css/css-flexbox/flexbox_flex-0-0-1-unitless-basis.html✓css/css-flexbox/flexbox_flex-0-0-auto-shrink.html✓css/css-flexbox/flexbox_flex-0-0-auto.html✓css/css-flexbox/flexbox_flex-0-0-N-shrink.html✓css/css-flexbox/flexbox_flex-0-0-N-unitless-basis.html
+ 28 more
Measured against Chrome 148.0.7778.96 on 2026-08-27, with up to 40 candidate values tried per property. All properties · How the measurement works