Merge branch 'master' of https://github.com/thysultan/stylis

Author: thysultan

src/Prefixer.js

@@ -16,11 +16,14 @@ export function prefix (value, length, children) {
 		case 5737: case 4201: case 3177: case 3433: case 1641: case 4457: case 2921:
 		// text-decoration, filter, clip-path, backface-visibility, column, box-decoration-break
 		case 5572: case 6356: case 5844: case 3191: case 6645: case 3005:
-		// mask, mask-image, mask-(mode|clip|size), mask-(repeat|origin), mask-position, mask-composite,
-		case 6391: case 5879: case 5623: case 6135: case 4599: case 4855:
 		// background-clip, columns, column-(count|fill|gap|rule|rule-color|rule-style|rule-width|span|width)
 		case 4215: case 6389: case 5109: case 5365: case 5621: case 3829:
+		// mask, mask-image, mask-(mode|clip|size), mask-(repeat|origin), mask-position
+		case 6391: case 5879: case 5623: case 6135: case 4599:
 			return WEBKIT + value + value
+		// mask-composite
+		case 4855:
+			return WEBKIT + value.replace('add', 'source-over').replace('substract', 'source-out').replace('intersect', 'source-in').replace('exclude', 'xor') + value
 		// tab-size
 		case 4789:
 			return MOZ + value + value