code along wesbos#3 update css vars with js

mmoroney01 · mmoroney01 · commit 28634eede939 · 2018-05-17T10:57:43.000-05:00
diff --git a/03 - CSS Variables/index-START.html b/03 - CSS Variables/index-START.html
@@ -22,6 +22,22 @@ <h2>Update CSS Variables with <span class='hl'>JS</span></h2>
 
   <style>
 
+  :root{
+    --base: #ffc600;
+    --spacing: 10px;
+    --blur: 10px;
+  }
+
+  img {
+    padding: var(--spacing);
+    background: var(--base);
+    filter: blur(var(--blur));
+  }
+
+  .hl {
+    color: var(--base);
+  }
+
     /*
       misc styles, nothing to do with CSS variables
     */
@@ -45,6 +61,16 @@ <h2>Update CSS Variables with <span class='hl'>JS</span></h2>
   </style>
 
   <script>
+    const inputs = document.querySelectorAll('.controls input');
+
+    function handleUpdate(){
+      const suffix = this.dataset.sizing || '';
+      document.documentElement.style.setProperty(`--${this.name}`, this.value + suffix);
+    }
+
+    //each input listens for change and runs handleUpdate
+    inputs.forEach(input => input.addEventListener('change', handleUpdate));
+    inputs.forEach(input => input.addEventListener('mousemove', handleUpdate));
   </script>
 
 </body>
