JavaScript implements random generation div background color

JavaScript implements random generation div background color _javascript technique

Last Update:2017-01-19 Source: Internet

Author: User

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Random colors have two formats:
Effect preview: http://wjf444128852.github.io/DEMOLIST/JS/test/index.html
1, RGB (XXX,XXX,XXX)
2, #xxxxxx
Implement two methods of randomization
thinking: How to make x random,
1, XXX is a random integer between 0-255, using Math.random () *255 to obtain a random number between 0-255,
then Math.floor () retains the
2 before the decimal point, X in the 0123456789abxdef is a combination of random 6,
here can be used array or string processing, where the array, as long as from the array 6 times, each get the array subscript is 0-16 between the random integer.
Note (although #xxxx is changed in Law II, the browser looks at the Background-color property value of the DOM element or RGB format, but the assignment in JS is # XXX format.
Code is as follows:
html

<body>
  <div class= "main" >
    <p><a href= "javascript:;" id= "Btn-one" >randomcolor-rgb </a></p>
    <ul>
      <li><div class= "Bg_color" ></div></li>
      < Li><div class= "Bg_color" ></div></li>
      <li><div class= "Bg_color" ></div> </li>
      <li><div class= "Bg_color" ></div></li>
    </ul>
  </div>
  <div class= "main" >
    <p><a href= "javascript:;" id= "Btn-two" >randomcolor-#XXXXXX </a ></p>
    <ul>
      <li><div class= "Bg_two" ></div></li>
      <li> <div class= "Bg_two" ></div></li>
      <li><div class= "Bg_two" ></div></li >
      <li><div class= "Bg_two" ></div></li>
    </ul>
  </div>
</body>

Css

*{
      Box-sizing:border-box;
      List-style:none;
      Border:none;
      padding:0;
      margin:0;
    }
    p{
      Text-align:center;
      margin:20px;
    }
    P a{
      font-size:20px;
      font-weight:300;
      Color: #e4393c;
      Text-decoration:none;
      PADDING:6PX 10px;
      border:1px solid currentcolor;
    bg_color,.bg_two{
      width:100px;
      height:100px;
      border:1px solid #aa00aa;
    Main,.main ul{
      Overflow:hidden;
    main{
      width:400px;
      margin:30px Auto;
    Main ul li{
      float:left;
    }

<script> (function () {//1, random-colored functions-rgb functional Getrandomcolor () {var rgb= ' rgb (' +math.floor ') (Math.rand
      Om () *255) + ', ' +math.floor (Math.random () *255) + ', ' +math.floor (Math.random () *255) + ') ';
      Console.log (RGB);
    return RGB;
    //Get button var btn_one=document.queryselector ("#btn-one");
    var divs=document.queryselectorall (". Bg_color"); Btn_one.onclick=function () {for (Var i=0;i<divs.length;i++) {Divs[i].style.backgroundcolor=getrandomcolor (
      );
    }
    };
    2, random color #xxxxxx var btn_two=document.queryselector ("#btn-two");
    var divstwo=document.queryselectorall (". Bg_two");
    var chars = [' 0 ', ' 1 ', ' 2 ', ' 3 ', ' 4 ', ' 5 ', ' 6 ', ' 7 ', ' 8 ', ' 9 ', ' A ', ' B ', ' C ', ' D ', ' E ', ' F ';
      function generatemixed (n) {var res = ' # ';
      var id;
        for (var i = 0; i < n; i + +) {id= Math.floor (math.random () *16);
      res = Chars[id];
      } console.log (Id,res);
    return res; } btn_two.onclick=functIon () {for (Var i=0;i<divstwo.length;i++) {divstwo[i].style.backgroundcolor=generatemixed (6);
  }
    };
 }) () </script>

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JavaScript implements random generation div background color _javascript technique

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