properly handle font: shorthands. close #25.

Author: leeoniya

dist/dropcss.cjs.js

@@ -879,6 +879,14 @@ function dropFontFaces(css, shouldDrop) {
 		}
 	}
 
+	var RE3 = /font:([^;!}]+)/gm;
+
+	while (m = RE3.exec(css)) {
+		m[1].trim().split(",").forEach(function (a) {
+			used.add(a.trim().match(/\s*['"]?([\w- ]+)['"]?$/)[1]);
+		});
+	}
+
 	return removeBackwards(css, defs, used, shouldDrop, '@font-face ');
 }
 

dist/dropcss.js

@@ -883,6 +883,14 @@
 			}
 		}
 
+		var RE3 = /font:([^;!}]+)/gm;
+
+		while (m = RE3.exec(css)) {
+			m[1].trim().split(",").forEach(function (a) {
+				used.add(a.trim().match(/\s*['"]?([\w- ]+)['"]?$/)[1]);
+			});
+		}
+
 		return removeBackwards(css, defs, used, shouldDrop, '@font-face ');
 	}
 

dist/dropcss.min.js

@@ -89,6 +89,14 @@ function dropFontFaces(css, shouldDrop) {
 		}
 	}
 
+	let RE3 = /font:([^;!}]+)/gm;
+
+	while (m = RE3.exec(css)) {
+		m[1].trim().split(",").forEach(a => {
+			used.add(a.trim().match(/\s*['"]?([\w- ]+)['"]?$/)[1]);
+		});
+	}
+
 	return removeBackwards(css, defs, used, shouldDrop, '@font-face ');
 }
 

src/dropcss.js

@@ -1,9 +1,9 @@
 ------------|----------|----------|----------|----------|-------------------|
 File        |  % Stmts | % Branch |  % Funcs |  % Lines | Uncovered Line #s |
 ------------|----------|----------|----------|----------|-------------------|
-All files   |    96.55 |    89.41 |       98 |    96.43 |                   |
+All files   |    96.58 |    89.41 |    98.04 |    96.46 |                   |
  css.js     |    97.22 |    90.48 |      100 |    97.12 |       133,134,167 |
- dropcss.js |    98.33 |    93.48 |      100 |    98.21 |            59,172 |
+ dropcss.js |    98.39 |    93.48 |      100 |    98.28 |            59,180 |
  err.js     |       50 |      100 |        0 |       50 |                 2 |
  find.js    |    99.19 |    95.24 |      100 |    99.18 |               163 |
  html.js    |     97.8 |    92.31 |      100 |     97.7 |            73,117 |