add ignore paragraph to readme

lihuakkk · Jul 31, 2015 · a8c1264 · a8c1264
1 parent 0496fb1
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diff --git a/README.md b/README.md
@@ -74,3 +74,19 @@ gulp.task('css', function () {
         .pipe(gulp.dest('build/css'));
 });
 ```
+
+### A message about ignoring properties
+Currently, the easiest way to have a single property ignored is to use a capital in the pixel unit declaration.
+
+```css
+// `px` is converted to `rem`
+.convert {
+    font-size: 16px; // converted to 1rem
+}
+
+// `Px` or `PX` is ignored by `postcss-pxtorem` but still accepted by browsers
+.ignore {
+    border: 1Px solid; // ignored
+    border-width: 2PX; // ignored
+}
+```
diff --git a/package.json b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "postcss-pxtorem",
   "description": "A CSS post-processor that converts px to rem.",
-  "version": "2.3.0",
+  "version": "2.3.1",
   "author": "cuth",
   "license": "MIT",
   "repository": {