From ef6e9e6c7b84e017119e5579b2d5fb06bc983e50 Mon Sep 17 00:00:00 2001
From: changicho <changicho29@gmail.com>
Date: Tue, 30 Jun 2020 13:58:55 +0900
Subject: [PATCH] Feat: Add 27 - Click and Drag
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

?: offset, pageX를 이용해 드래그 스크롤 구현
dom 태그의 scrollLeft 속성 값을 제어해 스크롤 이벤트를 할당함
실제 dom의 위치를 고려해줘야 하므로 dom의 offsetLeft를 이용해
보정해줌
---
 27 - Click and Drag/changi.html | 69 +++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 27 - Click and Drag/changi.html
diff --git a/27 - Click and Drag/changi.html b/27 - Click and Drag/changi.html
new file mode 100644
index 0000000..f9e6511
--- /dev/null
+++ b/27 - Click and Drag/changi.html	
@@ -0,0 +1,69 @@
+<!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", (evt) => {
+        isDown = true;
+        slider.classList.add("active");
+
+        startX = evt.pageX - slider.offsetLeft;
+        scrollLeft = slider.scrollLeft;
+      });
+      slider.addEventListener("mouseleave", (evt) => {
+        isDown = false;
+        slider.classList.remove("active");
+      });
+      slider.addEventListener("mouseup", (evt) => {
+        isDown = false;
+        slider.classList.remove("active");
+      });
+      slider.addEventListener("mousemove", (evt) => {
+        if (!isDown) return;
+        evt.preventDefault();
+
+        const x = evt.pageX - slider.offsetLeft;
+        const walk = x - startX;
+
+        slider.scrollLeft = scrollLeft - walk;
+      });
+    </script>
+  </body>
+</html>
