Adding property, Thanks @shinze ref. #40

_posts/2015-02-26-appearance.md

@@ -0,0 +1,33 @@
+---
+title: appearance
+url: appearance
+prefixed: true
+---
+
+<article id="appearance" class="feature prefix-{{page.prefixed}}">
+    <header class="feature__header">
+        <h2>appearance</h2>
+    </header>
+    <p class="feature__description">
+        The appearance property defines how elements (particularly form controls) appear by default. By setting the value to none the default appearance can be entirely redefined using other CSS properties.
+    </p>
+    <pre class="feature__code">
+        <code>
+        /**
+         * Microsoft Edge and IE mobile support this property width the -webkit-
+         * prefix rather than -ms- for interop reasons.
+         */
+            .input-element {
+                -webkit-appearance: none;
+                -moz-appearance: none;
+                appearance: none;
+            }
+        </code>
+    </pre>
+    <footer class="feature__footer">
+        <a href="http://caniuse.com/#feat=css-appearance">Browser support</a>
+        <a href="https://css-tricks.com/almanac/properties/a/appearance/">Sample use</a>
+        <a href="https://github.com/davidhund/shouldiprefix/blob/master/_posts/{{page.date | date: "%Y-%m-%d"}}-{{page.title}}.md">Edit this</a>
+        <span class="feature__prefix">{{page.prefixed}}</span>
+    </footer>
+</article>