Completing javascript30 day 27 in own index file

tomgillard · tomgillard · commit 45cc4231472e · 2017-08-20T13:36:35.000+10:00
diff --git a/27 - Click and Drag/index.html b/27 - Click and Drag/index.html
@@ -0,0 +1,71 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>Click and Drag</title>
+  <link rel="stylesheet" href="style.css">
+</head>
+<body>
+  <div class="items">
+    <div class="item item1">01</div>
+    <div class="item item2">02</div>
+    <div class="item item3">03</div>
+    <div class="item item4">04</div>
+    <div class="item item5">05</div>
+    <div class="item item6">06</div>
+    <div class="item item7">07</div>
+    <div class="item item8">08</div>
+    <div class="item item9">09</div>
+    <div class="item item10">10</div>
+    <div class="item item11">11</div>
+    <div class="item item12">12</div>
+    <div class="item item13">13</div>
+    <div class="item item14">14</div>
+    <div class="item item15">15</div>
+    <div class="item item16">16</div>
+    <div class="item item17">17</div>
+    <div class="item item18">18</div>
+    <div class="item item19">19</div>
+    <div class="item item20">20</div>
+    <div class="item item21">21</div>
+    <div class="item item22">22</div>
+    <div class="item item23">23</div>
+    <div class="item item24">24</div>
+    <div class="item item25">25</div>
+  </div>
+
+  <script>
+    const slider = document.querySelector('.items');
+    let isDown = false;
+    let startX;
+    let scrollLeft;
+
+    slider.addEventListener('mousedown', (e) => {
+      isDown = true;
+      slider.classList.add('active');
+      startX = e.pageX - slider.offsetLeft;
+      scrollLeft = slider.scrollLeft;
+    });
+
+    slider.addEventListener('mouseup', () => {
+      isDown = false;
+      slider.classList.remove('active');
+    });
+
+    slider.addEventListener('mouseleave', () => {
+      isDown = false;
+      slider.classList.remove('active');
+    });
+
+    slider.addEventListener('mousemove', (e) => {
+      if(!isDown) return;
+      e.preventDefault();
+      const x = e.pageX - slider.offsetLeft;
+      const walk = (x - startX) * 3;
+      slider.scrollLeft = scrollLeft - walk;
+    });
+
+  </script>
+
+  </body>
+</html>
