JS method to implement different fields of table sorting

<table id="tableSort">
    <thead>
        <tr>
            <th data-type="num">工号</th>
            <th data-type="string">姓名</th>
            <th data-type="string">性别</th>
            <th data-type="date">时间</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>06</td>
            <td>sssss</td>
            <td>男</td>
            <td>2008-10-10</td>
        </tr>
        <tr>
            <td>07</td>
            <td>ddddd</td>
            <td>男</td>
            <td>2009-10-10</td>
        </tr>
        <tr>
            <td>11</td>
            <td>qqqqq</td>
            <td>男</td>
            <td>2010-10-10</td>
        </tr>
        <tr>
            <td>02</td>
            <td>vvvvv</td>
            <td>男</td>
            <td>2011-10-10</td>
        </tr>
        <tr>
            <td>11</td>
            <td>hhhhh</td>
            <td>男</td>
            <td>2011-12-10</td>
        </tr>
        <tr>
            <td>01</td>
            <td>eeeee</td>
            <td>女</td>
            <td>2015-10-10</td>
        </tr>
        <tr>
            <td>09</td>
            <td>mmmmm</td>
            <td>女</td>
            <td>2015-11-10</td>
        </tr>
    </tbody></table>

<script> 
    var th = document.querySelector("#tableSort").tHead.rows[0].cells;
    var tbody = document.querySelector("#tableSort").tBodies[0];
    var td = tbody.rows;
    for(var i=0;
    i<th.length;
    i++) {
    th[i].flag = 1;
    th[i].onclick = function () {
    sort(this.getAttribute("data-type"),this.cellIndex,this.flag);
    this.flag = -this.flag;
}
} function sort(str,index,flag) {
    var arr = [];
    for(var i=0;
    i<td.length;
    i++) {
    arr.push(td[i]);
}
;
    //排序开始 arr.sort(function(a,b) {
    return method(str, a.cells[index].innerHTML, b.cells[index].innerHTML)*flag;
}
);
    //添加到table for(var i=0;
    i<arr.length;
    i++) {
    tbody.appendChild(arr[i]) }
} //排序方法 function method(str,a,b) {
    switch(str) {
    case &#39;num&#39;: return a-b;
    break;
    case &#39;string&#39;: return a.localeCompare(b);
    break;
    case "date": //日期排序，IE8下&#39;2012-12-12&#39;这种格式无法设置时间，替换成&#39;/&#39; return new Date(a.split("-").join("/")).getTime() - new Date(b.split("-").join("/")).getTime();
}
}
</script>
对于sort（）排序方法。里面可以自定义小编觉得还是挺灵活的 arr.sort((a,b) => a-b) 针对number类型，

arr.sort((a,b) => a.localeCompare(b))这波能反杀，针对string类型作比较 可返回（1,0，-1）三个选项，

1,0，-1的先后顺序，由于小编记忆力极差，刚看就忘了，请大家自行百度

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