|
|
@@ -0,0 +1,41 @@
|
|
|
+<!DOCTYPE html>
|
|
|
+<html lang="en">
|
|
|
+
|
|
|
+<head>
|
|
|
+ <meta charset="UTF-8">
|
|
|
+ <meta name="viewport" content="width=device-width, initial-scale=1.0">
|
|
|
+ <title>Document</title>
|
|
|
+ <style>
|
|
|
+ .box {
|
|
|
+ width: 100px;
|
|
|
+ height: 100px;
|
|
|
+ background-color: red;
|
|
|
+ position: fixed;
|
|
|
+ }
|
|
|
+ </style>
|
|
|
+</head>
|
|
|
+
|
|
|
+<body>
|
|
|
+ <div class="box"></div>
|
|
|
+ <script>
|
|
|
+ var oBox = document.getElementsByClassName("box")[0];
|
|
|
+ var oDoc = document.documentElement;
|
|
|
+
|
|
|
+ oBox.onmousedown = function (event) {
|
|
|
+ // console.log(oBox.offsetTop);
|
|
|
+ // console.log(event.clientY);
|
|
|
+ var y = event.clientY - oBox.offsetTop;
|
|
|
+ var x = event.clientX - oBox.offsetLeft;
|
|
|
+ oDoc.onmousemove = function (event) {
|
|
|
+ oBox.style.top = event.clientY - y + "px";
|
|
|
+ oBox.style.left = event.clientX - x + "px";
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ oBox.onmouseup = function () {
|
|
|
+ oDoc.onmousemove = null;
|
|
|
+ }
|
|
|
+ </script>
|
|
|
+</body>
|
|
|
+
|
|
|
+</html>
|
