我需要将5个n个li项目的列表随机化,并为1-5个项目设置一个特定的位置,例如,我有


一个
b
C
d
Ë
F


我想将最后4个随机化,并放在li [0]字母D和li [2]字母F上
结果:


d
F
C
b
一个
Ë


这是我的代码。我哪里错了?谢谢!

    var ul = document.querySelector('ul');
    for (var i = ul.children.length; i >= 0; i--) {

    if(ul.children.innerHTML == "XXX") {
        ul.appendChild(ul.children[0]);
    }
    if(ul.children.innerHTML == "XXXX") {
        ul.appendChild(ul.children[1]);
    }
    if(ul.children.innerText == "XX") {
        ul.appendChild(ul.children[2]);
    } else {
        ul.appendChild(ul.children[generateRandom(i) | 0]);
    }
}


function generateRandom(i) {
    var num = Math.random() * i | 0;
    return (num === 0 || num === 1 || num === 2) ? generateRandom(i) : num;
}

最佳答案

var $test = $('#test');
var $li = $test.children();

while ($li.length > 0) {
  //pick a random li from the variable
  var $next = $li.eq( Math.floor( Math.random() * 10 * $li.length ) % $li.length );
  //move it to the end of ul
  $test.append($next);
  //remove the li from our variable so it won't be found again
  $li = $li.not($next);
}

//move the f to the top, so when we move the d to the top it will be second
$test.prepend($test.children().filter(function(){ return this.innerHTML === 'f'; }));
//move the d to the top
$test.prepend($test.children().filter(function(){ return this.innerHTML === 'd'; }));

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul id="test">
  <li>a</li>
  <li>b</li>
  <li>c</li>
  <li>d</li>
  <li>e</li>
  <li>f</li>
  <li>g</li>
  <li>h</li>
  <li>i</li>
  <li>j</li>
  <li>k</li>
</ul>

关于javascript - 随机分配li项并卡住多个,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/47232470/

10-10 01:20
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