js隨機生成不同顏色塊隨機移動
阿新 • • 發佈：2019-02-16
<style type="text/css"> div{ width: 100px; height: 100px; background-color: red; position: absolute; margin-left: 10px; float: left; } </style> </head> <body id="body1"> <button onclick="btn()">建立div</button> <script> function btn(){ var id; //動態建立元素 var str=document.createElement("div"); //元素的背景色隨機的 str.style.backgroundColor=getColorRandom(); //將生成的div追加到body中 document.getElementById("body1").appendChild(str); //隨機生成的id設定為動態建立的div的id str.id="items"+parseInt(Math.random()*10000); // 獲取動態生成的div的id var obj=document.getElementById(str.id); var disX=0; var disY=0; //滑鼠點選落下事件 obj.onmousedown=function (event){ disX=event.clientX-obj.offsetLeft; disY=event.clientY-obj.offsetTop; //滑鼠移開事件 document.onmousemove=function(ev){ obj.style.left=ev.clientX-disX+"px"; obj.style.top=ev.clientY-disY+"px"; } //滑鼠鬆開事件 document.onmouseup= function () { document.onmousemove=null; document.onmouseup=null; } } //生成隨機顏色 function getColorRandom(){ var c="#"; var cArray=["0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F"]; for(var i=0;i<6;i++){ var cIndex= Math.round(Math.random()*15); c+=cArray[cIndex]; } return c; } } </script> </body>