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+# PostCSS Opacity [![Build Status](https://travis-ci.org/iamvdo/postcss-opacity.svg)](https://travis-ci.org/iamvdo/postcss-opacity)
+
+[PostCSS](https://github.com/postcss/postcss) plugin that adds support for legacy browser opacity alternatives.
+
+## Example
+```js
+postcss([
+	require('postcss-opacity')
+])
+```
+
+```css
+/* Input example */
+.foo {
+  opacity: .5;
+}
+```
+
+```css
+/* Output example */
+.foo {
+  -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=50)";
+  opacity: .5;
+}
+```
+
+## Legacy
+Support for IE 5-7, Safari 1.X, Netscape
+
+```js
+postcss([
+	require('postcss-opacity')({
+		legacy: true	
+	})
+])
+```
+
+```css
+/* Input example */
+.foo {
+  opacity: .5;
+}
+```
+
+```css
+/* Output example */
+.foo {
+  /* IE 8 */
+  -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=50)";
+
+  /* IE 5-7 */
+  filter: alpha(opacity=50);
+
+  /* Netscape */
+  -moz-opacity: .5;
+
+  /* Safari 1.x */
+  -khtml-opacity: .5;
+
+  /* Modern browsers */
+  opacity: .5;
+}
+```
+
+See [PostCSS](https://github.com/postcss/postcss) docs for examples for your environment.