将字符串顺序重新排序DOM节点

Posted 2020-10-08 _DongGe

对于一个已有的html结构：

1. Haskell
2. javascript
3. Python
4. Ruby
5. Scheme

<!-- HTML结构 -->
<ol id="test-list">
    <li class="lang">Scheme</li>
    <li class="lang">JavaScript</li>
    <li class="lang">Python</li>
    <li class="lang">Ruby</li>
    <li class="lang">Haskell</li>
</ol>

javascript代码：

var list = document.getElementById(‘test-list‘)
var slist = list.children;
console.log(slist);
slist = Array.prototype.slice.call(slist).sort(function(a, b){
   return a.innerHTML > b.innerHTML ? 1 : -1 ;
})
slist.forEach(function(el){
     list.appendChild(el);
})

测试：

// 测试:
;(function () {
    var
        arr, i,
        t = document.getElementById(‘test-list‘);
    if (t && t.children && t.children.length === 5) {
        arr = [];
        for (i=0; i<t.children.length; i++) {
            arr.push(t.children[i].innerText);
        }
        if (arr.toString() === [‘Haskell‘, ‘JavaScript‘, ‘Python‘, ‘Ruby‘, ‘Scheme‘].toString()) {
            alert(‘测试通过!‘);
        }
        else {
            alert(‘测试失败: ‘ + arr.toString());
        }
    }
    else {
        alert(‘测试失败!‘);
    }
})();

 

内容摘自https://www.liaoxuefeng.com/wiki/001434446689867b27157e896e74d51a89c25cc8b43bdb3000/0014359940861047248456754f44e55919fe9370c723ae6000#0