Small, Large, and Dynamic viewport units

Viewport units similar to vw and vh that are based on shown or hidden browser UI states to address shortcomings of the original units. Currently defined as the sv* units (svb, svh, svi, svmax, svmin, svw), lv* units (lvb, lvh, lvi, lvmax, lvmin, lvw), dv* units (dvb, dvh, dvi, dvmax, dvmin, dvw) and the logical vi/vb units.

Chrome

❌ 4 - 99: Not supported
❌ 100 - 107: Disabled by default
✅ 108 - 134: Supported
✅ 135: Supported
✅ 136 - 138: Supported

Edge

❌ 12 - 104: Not supported
❌ 105 - 107: Disabled by default
✅ 108 - 134: Supported
✅ 135: Supported

Safari

❌ 3.1 - 15.3: Not supported
✅ 15.4 - 18.3: Supported
✅ 18.4: Supported
✅ 18.5 - TP: Supported

Firefox

❌ 2 - 100: Not supported
✅ 101 - 136: Supported
✅ 137: Supported
✅ 138 - 140: Supported

Opera

❌ 9 - 90: Not supported
❌ 91 - 93: Disabled by default
✅ 94 - 116: Supported
✅ 117: Supported

IE

❌ 5.5 - 10: Not supported
❌ 11: Not supported

Chrome for Android

✅ 135: Supported

Safari on iOS

❌ 3.2 - 15.3: Not supported
✅ 15.4 - 18.3: Supported
✅ 18.4: Supported
✅ 18.5: Supported

Samsung Internet

❌ 4 - 20: Not supported
✅ 21 - 26: Supported
✅ 27: Supported

Opera Mini

❌ all: Not supported

Opera Mobile

❌ 10 - 12.1: Not supported
✅ 80: Supported

UC Browser for Android

❌ 15.5: Not supported

Android Browser

❌ 2.1 - 4.4.4: Not supported
✅ 135: Supported

Firefox for Android

✅ 137: Supported

QQ Browser

❌ 14.9: Not supported

Baidu Browser

❌ 13.52: Not supported

KaiOS Browser

❌ 2.5: Not supported
❌ 3: Not supported

Resources:: Chromium support bug; WebKit support bug; Firefox support bug; MDN Web Docs - Relative length units based on viewport; Blog post explaining the new units