JS實現點擊按鈕隨機生成可拖動的不同顏色塊示例

2019-11-19 12:11:39

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本文實例講述了JS實現點擊按鈕隨機生成可拖動的不同顏色塊。分享給大家供大家參考，具體如下：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>m.survivalescaperooms.com JS點擊生成隨機顏色塊</title><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()">創建div</button><script>  function btn(){    var id;    //動態創建元素    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設置為動態創建的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;    //鼠標點擊落下事件    obj.onmousedown=function (event){      disX=event.clientX-obj.offsetLeft;      disY=event.clientY-obj.offsetTop;      //鼠標移開事件      document.onmousemove=function(ev){        obj.style.left=ev.clientX-disX+"px";        obj.style.top=ev.clientY-disY+"px";      }      //鼠標松開事件      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></html>

這里使用在線HTML/CSS/JavaScript代碼運行工具：http://tools.VeVB.COm/code/HtmlJsRun測試上述代碼，可得如下運行效果：