我正在寻找一个表格排序解决方案(在 JavaScript 中),但我似乎还找不到合适的解决方案。我只需要它按字母顺序对每一列进行排序。它不需要忽略任何代码或任何数字或使用货币。只需单击列标题即可将其从已排序的 az/za 切换。
有谁知道这样一个非常简单的解决方案?
我正在寻找一个表格排序解决方案(在 JavaScript 中),但我似乎还找不到合适的解决方案。我只需要它按字母顺序对每一列进行排序。它不需要忽略任何代码或任何数字或使用货币。只需单击列标题即可将其从已排序的 az/za 切换。
有谁知道这样一个非常简单的解决方案?
只是重新审视一个旧的解决方案,我想我会在它的 5 周年纪念日给它改头换面!
click
向所有标题 ( ) 单元格添加事件th
...table
,查找所有行(第一行除外)...const getCellValue = (tr, idx) => tr.children[idx].innerText || tr.children[idx].textContent;
const comparer = (idx, asc) => (a, b) => ((v1, v2) =>
v1 !== '' && v2 !== '' && !isNaN(v1) && !isNaN(v2) ? v1 - v2 : v1.toString().localeCompare(v2)
)(getCellValue(asc ? a : b, idx), getCellValue(asc ? b : a, idx));
// do the work...
document.querySelectorAll('th').forEach(th => th.addEventListener('click', (() => {
const table = th.closest('table');
Array.from(table.querySelectorAll('tr:nth-child(n+2)'))
.sort(comparer(Array.from(th.parentNode.children).indexOf(th), this.asc = !this.asc))
.forEach(tr => table.appendChild(tr) );
})));
table, th, td {
border: 1px solid black;
}
th {
cursor: pointer;
}
<table>
<tr><th>Country</th><th>Date</th><th>Size</th></tr>
<tr><td>France</td><td>2001-01-01</td><td><i>25</i></td></tr>
<tr><td><a href=#>spain</a></td><td><i>2005-05-05</i></td><td></td></tr>
<tr><td><b>Lebanon</b></td><td><a href=#>2002-02-02</a></td><td><b>-17</b></td></tr>
<tr><td><i>Argentina</i></td><td>2005-04-04</td><td><a href=#>100</a></td></tr>
<tr><td>USA</td><td></td><td>-6</td></tr>
</table>
如果你想支持 IE11,你需要放弃 ES6 语法并使用 and 的替代Array.from
方法Element.closest
。
var getCellValue = function(tr, idx){ return tr.children[idx].innerText || tr.children[idx].textContent; }
var comparer = function(idx, asc) { return function(a, b) { return function(v1, v2) {
return v1 !== '' && v2 !== '' && !isNaN(v1) && !isNaN(v2) ? v1 - v2 : v1.toString().localeCompare(v2);
}(getCellValue(asc ? a : b, idx), getCellValue(asc ? b : a, idx));
}};
// do the work...
Array.prototype.slice.call(document.querySelectorAll('th')).forEach(function(th) { th.addEventListener('click', function() {
var table = th.parentNode
while(table.tagName.toUpperCase() != 'TABLE') table = table.parentNode;
Array.prototype.slice.call(table.querySelectorAll('tr:nth-child(n+2)'))
.sort(comparer(Array.prototype.slice.call(th.parentNode.children).indexOf(th), this.asc = !this.asc))
.forEach(function(tr) { table.appendChild(tr) });
})
});
为了简洁起见,我压缩了comparer()
函数。它有点复杂/难以阅读,所以在这里再次分解/格式化/注释。
// Returns a function responsible for sorting a specific column index
// (idx = columnIndex, asc = ascending order?).
var comparer = function(idx, asc) {
// This is used by the array.sort() function...
return function(a, b) {
// This is a transient function, that is called straight away.
// It allows passing in different order of args, based on
// the ascending/descending order.
return function(v1, v2) {
// sort based on a numeric or localeCompare, based on type...
return (v1 !== '' && v2 !== '' && !isNaN(v1) && !isNaN(v2))
? v1 - v2
: v1.toString().localeCompare(v2);
}(getCellValue(asc ? a : b, idx), getCellValue(asc ? b : a, idx));
}
};
我写了一些代码,它将按行对表格进行排序,假设只有一个<tbody>
并且单元格没有colspan。
function sortTable(table, col, reverse) {
var tb = table.tBodies[0], // use `<tbody>` to ignore `<thead>` and `<tfoot>` rows
tr = Array.prototype.slice.call(tb.rows, 0), // put rows into array
i;
reverse = -((+reverse) || -1);
tr = tr.sort(function (a, b) { // sort rows
return reverse // `-1 *` if want opposite order
* (a.cells[col].textContent.trim() // using `.textContent.trim()` for test
.localeCompare(b.cells[col].textContent.trim())
);
});
for(i = 0; i < tr.length; ++i) tb.appendChild(tr[i]); // append each row in order
}
// sortTable(tableNode, columId, false);
如果您不想做出上述假设,则需要考虑在每种情况下您希望如何表现。(例如,将所有内容合二为一<tbody>
或将所有前面的colspan值相加,等等)
然后,您可以将其附加到您的每个表中,例如假设标题在<thead>
function makeSortable(table) {
var th = table.tHead, i;
th && (th = th.rows[0]) && (th = th.cells);
if (th) i = th.length;
else return; // if no `<thead>` then do nothing
while (--i >= 0) (function (i) {
var dir = 1;
th[i].addEventListener('click', function () {sortTable(table, i, (dir = 1 - dir))});
}(i));
}
function makeAllSortable(parent) {
parent = parent || document.body;
var t = parent.getElementsByTagName('table'), i = t.length;
while (--i >= 0) makeSortable(t[i]);
}
然后调用makeAllSortable
onload。
它在桌子上工作的示例小提琴。
Nick Grealy 接受的答案很好,但如果您的行位于标签内,则行为有点古怪<tbody>
(第一行从未排序,排序后的行最终位于 tbody 标签之外,可能会丢失格式)。
这是一个简单的修复,但是:
只是改变:
document.querySelectorAll('th').forEach(th => th.addEventListener('click', (() => {
const table = th.closest('table');
Array.from(table.querySelectorAll('tr:nth-child(n+2)'))
.sort(comparer(Array.from(th.parentNode.children).indexOf(th), this.asc = !this.asc))
.forEach(tr => table.appendChild(tr) );
到:
document.querySelectorAll('th').forEach(th => th.addEventListener('click', (() => {
const table = th.closest('table');
const tbody = table.querySelector('tbody');
Array.from(tbody.querySelectorAll('tr'))
.sort(comparer(Array.from(th.parentNode.children).indexOf(th), this.asc = !this.asc))
.forEach(tr => tbody.appendChild(tr) );
它不仅仅是“排序”,而是 dataTables.net 可以满足您的需求。我每天都使用它并且得到很好的支持并且非常快(确实需要 jQuery)
DataTables 是 jQuery Javascript 库的插件。它是一个高度灵活的工具,基于渐进增强的基础,它将向任何 HTML 表格添加高级交互控件。
Google Visualizations 是另一种选择,但需要比 dataTables 更多的设置,但不需要任何特定的框架/库(除了 google.visualizations):
http://code.google.com/apis/ajax/playground/?type=visualization#table
还有其他选择……特别是如果您使用其他 JS 框架之一。Dojo、Prototype 等都有可用的“表格增强”插件,至少提供表格排序功能。许多提供更多,但我会重申......我还没有遇到过像 datatables.net 一样强大和快速的。
我知道使用 javascript 对 HTML 表进行排序的最佳方法是使用以下函数。
只需将您要排序的表的 ID 和行上的列号传递给它。它假定您正在排序的列是数字或其中包含数字,并将执行正则表达式替换以获取数字本身(非常适合货币和其他带有符号的数字)。
function sortTable(table_id, sortColumn){
var tableData = document.getElementById(table_id).getElementsByTagName('tbody').item(0);
var rowData = tableData.getElementsByTagName('tr');
for(var i = 0; i < rowData.length - 1; i++){
for(var j = 0; j < rowData.length - (i + 1); j++){
if(Number(rowData.item(j).getElementsByTagName('td').item(sortColumn).innerHTML.replace(/[^0-9\.]+/g, "")) < Number(rowData.item(j+1).getElementsByTagName('td').item(sortColumn).innerHTML.replace(/[^0-9\.]+/g, ""))){
tableData.insertBefore(rowData.item(j+1),rowData.item(j));
}
}
}
}
使用示例:
$(function(){
// pass the id and the <td> place you want to sort by (td counts from 0)
sortTable('table_id', 3);
});
您可以处理 json 数组和sort
函数。这是一个非常容易操作的可维护结构(例如:排序)。
未经测试,但这是这个想法。如果您传入一个数组,在该数组中将列按照它们应该排序的顺序放置,那将支持多重排序和顺序排序。
var DATA_TABLE = {
{name: 'George', lastname: 'Blarr', age:45},
{name: 'Bob', lastname: 'Arr', age: 20}
//...
};
function sortDataTable(arrayColNames, asc) { // if not asc, desc
for (var i=0;i<arrayColNames.length;i++) {
var columnName = arrayColNames[i];
DATA_TABLE = DATA_TABLE.sort(function(a,b){
if (asc) {
return (a[columnName] > b[columnName]) ? 1 : -1;
} else {
return (a[columnName] < b[columnName]) ? 1 : -1;
}
});
}
}
function updateHTMLTable() {
// update innerHTML / textContent according to DATA_TABLE
// Note: textContent for firefox, innerHTML for others
}
现在让我们假设您需要按姓氏排序,然后是姓名,最后是年龄。
var orderAsc = true;
sortDataTable(['lastname', 'name', 'age'], orderAsc);
它应该导致类似:
{name: 'Jack', lastname: 'Ahrl', age: 20},
{name: 'Jack', lastname: 'Ahrl', age: 22},
//...
这是一个使用纯 JavaScript 的完整示例。用于排序的算法基本上是BubbleSort。这是一个小提琴。
<!DOCTYPE html>
<html lang="de">
<head>
<meta charset="UTF-8">
<script type="text/javascript">
function sort(ascending, columnClassName, tableId) {
var tbody = document.getElementById(tableId).getElementsByTagName(
"tbody")[0];
var rows = tbody.getElementsByTagName("tr");
var unsorted = true;
while (unsorted) {
unsorted = false
for (var r = 0; r < rows.length - 1; r++) {
var row = rows[r];
var nextRow = rows[r + 1];
var value = row.getElementsByClassName(columnClassName)[0].innerHTML;
var nextValue = nextRow.getElementsByClassName(columnClassName)[0].innerHTML;
value = value.replace(',', '.'); // in case a comma is used in float number
nextValue = nextValue.replace(',', '.');
if (!isNaN(value)) {
value = parseFloat(value);
nextValue = parseFloat(nextValue);
}
if (ascending ? value > nextValue : value < nextValue) {
tbody.insertBefore(nextRow, row);
unsorted = true;
}
}
}
};
</script>
</head>
<body>
<table id="content-table">
<thead>
<tr>
<th class="id">ID <a
href="javascript:sort(true, 'id', 'content-table');">asc</a> <a
href="javascript:sort(false, 'id', 'content-table');">des</a>
</th>
<th class="country">Country <a
href="javascript:sort(true, 'country', 'content-table');">asc</a> <a
href="javascript:sort(false, 'country', 'content-table');">des</a>
</th>
<th class="some-fact">Some fact <a
href="javascript:sort(true, 'some-fact', 'content-table');">asc</a>
<a href="javascript:sort(false, 'some-fact', 'content-table');">des</a>
<th>
</tr>
</thead>
<tbody>
<tr>
<td class="id">001</td>
<td class="country">Germany</td>
<td class="some-fact">16.405</td>
</tr>
<tr>
<td class="id">002</td>
<td class="country">France</td>
<td class="some-fact">10.625</td>
</tr>
<tr>
<td class="id">003</td>
<td class="country">UK</td>
<td class="some-fact">15.04</td>
</tr>
<tr>
<td class="id">004</td>
<td class="country">China</td>
<td class="some-fact">13.536</td>
</tr>
</tbody>
</table>
</body>
</html>
您还可以从这里查看源代码:https ://github.com/wmentzel/table-sort
按单元格对表格行进行排序。1.简单一点,有一些特点。2.区分'数字'和'字符串'排序 3.添加切换以按ASC,DESC排序
var index; // cell index
var toggleBool; // sorting asc, desc
function sorting(tbody, index){
this.index = index;
if(toggleBool){
toggleBool = false;
}else{
toggleBool = true;
}
var datas= new Array();
var tbodyLength = tbody.rows.length;
for(var i=0; i<tbodyLength; i++){
datas[i] = tbody.rows[i];
}
// sort by cell[index]
datas.sort(compareCells);
for(var i=0; i<tbody.rows.length; i++){
// rearrange table rows by sorted rows
tbody.appendChild(datas[i]);
}
}
function compareCells(a,b) {
var aVal = a.cells[index].innerText;
var bVal = b.cells[index].innerText;
aVal = aVal.replace(/\,/g, '');
bVal = bVal.replace(/\,/g, '');
if(toggleBool){
var temp = aVal;
aVal = bVal;
bVal = temp;
}
if(aVal.match(/^[0-9]+$/) && bVal.match(/^[0-9]+$/)){
return parseFloat(aVal) - parseFloat(bVal);
}
else{
if (aVal < bVal){
return -1;
}else if (aVal > bVal){
return 1;
}else{
return 0;
}
}
}
下面是html示例
<table summary="Pioneer">
<thead>
<tr>
<th scope="col" onclick="sorting(tbody01, 0)">No.</th>
<th scope="col" onclick="sorting(tbody01, 1)">Name</th>
<th scope="col" onclick="sorting(tbody01, 2)">Belong</th>
<th scope="col" onclick="sorting(tbody01, 3)">Current Networth</th>
<th scope="col" onclick="sorting(tbody01, 4)">BirthDay</th>
<th scope="col" onclick="sorting(tbody01, 5)">Just Number</th>
</tr>
</thead>
<tbody id="tbody01">
<tr>
<td>1</td>
<td>Gwanshic Yi</td>
<td>Gwanshic Home</td>
<td>120000</td>
<td>1982-03-20</td>
<td>124,124,523</td>
</tr>
<tr>
<td>2</td>
<td>Steve Jobs</td>
<td>Apple</td>
<td>19000000000</td>
<td>1955-02-24</td>
<td>194,523</td>
</tr>
<tr>
<td>3</td>
<td>Bill Gates</td>
<td>MicroSoft</td>
<td>84300000000</td>
<td>1955-10-28</td>
<td>1,524,124,523</td>
</tr>
<tr>
<td>4</td>
<td>Larry Page</td>
<td>Google</td>
<td>39100000000</td>
<td>1973-03-26</td>
<td>11,124,523</td>
</tr>
</tbody>
</table>
另一种对 HTML 表格进行排序的方法。(基于W3.JS HTML 排序)
var collection = [{
"Country": "France",
"Date": "2001-01-01",
"Size": "25",
}, {
"Country": "spain",
"Date": "2005-05-05",
"Size": "",
}, {
"Country": "Lebanon",
"Date": "2002-02-02",
"Size": "-17",
}, {
"Country": "Argentina",
"Date": "2005-04-04",
"Size": "100",
}, {
"Country": "USA",
"Date": "",
"Size": "-6",
}]
for (var j = 0; j < 3; j++) {
$("#myTable th:eq(" + j + ")").addClass("control-label clickable");
$("#myTable th:eq(" + j + ")").attr('onClick', "w3.sortHTML('#myTable', '.item', 'td:nth-child(" + (j + 1) + ")')");
}
$tbody = $("#myTable").append('<tbody></tbody>');
for (var i = 0; i < collection.length; i++) {
$tbody = $tbody.append('<tr class="item"><td>' + collection[i]["Country"] + '</td><td>' + collection[i]["Date"] + '</td><td>' + collection[i]["Size"] + '</td></tr>');
}
.control-label:after {
content: "*";
color: red;
}
.clickable {
cursor: pointer;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://www.w3schools.com/lib/w3.js"></script>
<link href="https://www.w3schools.com/w3css/4/w3.css" rel="stylesheet" />
<p>Click the <strong>table headers</strong> to sort the table accordingly:</p>
<table id="myTable" class="w3-table-all">
<thead>
<tr>
<th>Country</th>
<th>Date</th>
<th>Size</th>
</tr>
</thead>
</table>
另一个紧凑但可读的解决方案:它只需要将类添加到要排序的每一列.order
的元素中<th>
document.querySelectorAll('th.order').forEach(th_elem => {
let asc=true
const index = Array.from(th_elem.parentNode.children).indexOf(th_elem)
th_elem.addEventListener('click', (e) => {
const arr = [... th_elem.closest("table").querySelectorAll('tbody tr')]
arr.sort( (a, b) => {
const a_val = a.children[index].innerText
const b_val = b.children[index].innerText
return (asc) ? a_val.localeCompare(b_val) : b_val.localeCompare(a_val)
})
arr.forEach(elem => {
th_elem.closest("table").querySelector("tbody").appendChild(elem)
})
asc = !asc
})
})
具有 :hover 箭头效果的表格排序。只需将类添加到要排序的每一列.order
的元素中<th>
function table_sort() {
const styleSheet = document.createElement('style')
styleSheet.innerHTML = `
.order-inactive span {
visibility:hidden;
}
.order-inactive:hover span {
visibility:visible;
}
.order-active span {
visibility: visible;
}
`
document.head.appendChild(styleSheet)
document.querySelectorAll('th.order').forEach(th_elem => {
let asc = true
const span_elem = document.createElement('span')
span_elem.style = "font-size:0.8rem; margin-left:0.5rem"
span_elem.innerHTML = "▼"
th_elem.appendChild(span_elem)
th_elem.classList.add('order-inactive')
const index = Array.from(th_elem.parentNode.children).indexOf(th_elem)
th_elem.addEventListener('click', (e) => {
document.querySelectorAll('th.order').forEach(elem => {
elem.classList.remove('order-active')
elem.classList.add('order-inactive')
})
th_elem.classList.remove('order-inactive')
th_elem.classList.add('order-active')
if (!asc) {
th_elem.querySelector('span').innerHTML = '▲'
} else {
th_elem.querySelector('span').innerHTML = '▼'
}
const arr = Array.from(th_elem.closest("table").querySelectorAll('tbody tr'))
arr.sort((a, b) => {
const a_val = a.children[index].innerText
const b_val = b.children[index].innerText
return (asc) ? a_val.localeCompare(b_val) : b_val.localeCompare(a_val)
})
arr.forEach(elem => {
th_elem.closest("table").querySelector("tbody").appendChild(elem)
})
asc = !asc
})
})
}
table_sort()
<table>
<thead>
<tr>
<th class="order">Country</th>
<th class="order">Date</th>
<th class="order">Size</th>
</tr>
</thead>
<tbody>
<tr>
<td>France</td>
<td>2001-01-01</td>
<td><i>25</i></td>
</tr>
<tr>
<td><a href=#>spain</a></td>
<td><i>2005-05-05</i></td>
<td></td>
</tr>
<tr>
<td><b>Lebanon</b></td>
<td><a href=#>2002-02-02</a></td>
<td><b>-17</b></td>
</tr>
<tr>
<td><i>Argentina</i></td>
<td>2005-04-04</td>
<td><a href=#>100</a></td>
</tr>
<tr>
<td>USA</td>
<td></td>
<td>-6</td>
</tr>
</tbody>
</table>
如果您的表格没有th
s 但只有td
s (包括标题),您可以尝试以下基于 Nick Grealy 上面的回答:
const getCellValue = (tr, idx) => tr.children[idx].innerText || tr.children[idx].textContent;
const comparer = (idx, asc) => (a, b) => ((v1, v2) =>
v1 !== '' && v2 !== '' && !isNaN(v1) && !isNaN(v2) ? v1 - v2 : v1.toString().localeCompare(v2)
)(getCellValue(asc ? a : b, idx), getCellValue(asc ? b : a, idx));
// do the work...
document.querySelectorAll('tr:first-child td').forEach(td => td.addEventListener('click', (() => {
const table = td.closest('table');
Array.from(table.querySelectorAll('tr:nth-child(n+2)'))
.sort(comparer(Array.from(td.parentNode.children).indexOf(td), this.asc = !this.asc))
.forEach(tr => table.appendChild(tr) );
})));
@charset "UTF-8";
@import url('https://fonts.googleapis.com/css?family=Roboto');
*{
font-family: 'Roboto', sans-serif;
text-transform:capitalize;
overflow:hidden;
margin: 0 auto;
text-align:left;
}
table {
color:#666;
font-size:12px;
background:#124;
border:#ccc 1px solid;
-moz-border-radius:3px;
-webkit-border-radius:3px;
border-radius:3px;
border-collapse: collapse;
width: 100%;
}
table td {
padding:10px;
border-top: 1px solid #ffffff;
border-bottom:1px solid #e0e0e0;
border-left: 1px solid #e0e0e0;
background: #fafafa;
background: -webkit-gradient(linear, left top, left bottom, from(#fbfbfb), to(#fafafa));
background: -moz-linear-gradient(top, #fbfbfb, #fafafa);
width: 6.9in;
}
table tbody tr:first-child td
{
background: #124!important;
color:#fff;
}
table tbody tr th
{
padding:10px;
border-left: 1px solid #e0e0e0;
background: #124!important;
color:#fff;
}
<table>
<tr><td>Country</td><td>Date</td><td>Size</td></tr>
<tr><td>France</td><td>2001-01-01</td><td><i>25</i></td></tr>
<tr><td>spain</td><td>2005-05-05</td><td></td></tr>
<tr><td>Lebanon</td><td>2002-02-02</td><td><b>-17</b></td></tr>
<tr><td>Argentina</td><td>2005-04-04</td><td>100</td></tr>
<tr><td>USA</td><td></td><td>-6</td></tr>
</table>
在页面加载时对 html 表格列进行排序
var table = $('table#all_items_table');
var rows = table.find('tr:gt(0)').toArray().sort(comparer(3));
for (var i = 0; i < rows.length; i++) {
table.append(rows[i])
}
function comparer(index) {
return function (a, b) {
var v1= getCellValue(a, index),
v2= getCellValue(b, index);
return $.isNumeric(v2) && $.isNumeric(v1) ? v2 - v1: v2.localeCompare(v1)
}
}
function getCellValue(row, index) {
return parseFloat($(row).children('td').eq(index).html().replace(/,/g,'')); //1234234.45645->1234234
}
我已经编辑了此处示例之一的代码以使用 jquery。不过,它仍然不是 100% jquery。关于这两个不同版本的任何想法,比如每个版本的优缺点是什么?
function column_sort() {
getCellValue = (tr, idx) => $(tr).find('td').eq( idx ).text();
comparer = (idx, asc) => (a, b) => ((v1, v2) =>
v1 !== '' && v2 !== '' && !isNaN(v1) && !isNaN(v2) ? v1 - v2 : v1.toString().localeCompare(v2)
)(getCellValue(asc ? a : b, idx), getCellValue(asc ? b : a, idx));
table = $(this).closest('table')[0];
tbody = $(table).find('tbody')[0];
elm = $(this)[0];
children = elm.parentNode.children;
Array.from(tbody.querySelectorAll('tr')).sort( comparer(
Array.from(children).indexOf(elm), table.asc = !table.asc))
.forEach(tr => tbody.appendChild(tr) );
}
table.find('thead th').on('click', column_sort);
<!DOCTYPE html>
<html>
<head>
<style>
table, td, th {
border: 1px solid;
border-collapse: collapse;
}
td , th {
padding: 5px;
width: 100px;
}
th {
background-color: lightgreen;
}
</style>
</head>
<body>
<h2>JavaScript Array Sort</h2>
<p>Click the buttons to sort car objects on age.</p>
<p id="demo"></p>
<script>
var nameArrow = "", yearArrow = "";
var cars = [
{type:"Volvo", year:2016},
{type:"Saab", year:2001},
{type:"BMW", year:2010}
];
yearACS = true;
function sortYear() {
if (yearACS) {
nameArrow = "";
yearArrow = "";
cars.sort(function(a,b) {
return a.year - b.year;
});
yearACS = false;
}else {
nameArrow = "";
yearArrow = "";
cars.sort(function(a,b) {
return b.year - a.year;
});
yearACS = true;
}
displayCars();
}
nameACS = true;
function sortName() {
if (nameACS) {
nameArrow = "";
yearArrow = "";
cars.sort(function(a,b) {
x = a.type.toLowerCase();
y = b.type.toLowerCase();
if (x > y) {return 1;}
if (x < y) {return -1};
return 0;
});
nameACS = false;
} else {
nameArrow = "";
yearArrow = "";
cars.sort(function(a,b) {
x = a.type.toUpperCase();
y = b.type.toUpperCase();
if (x > y) { return -1};
if (x <y) { return 1 };
return 0;
});
nameACS = true;
}
displayCars();
}
displayCars();
function displayCars() {
var txt = "<table><tr><th onclick='sortName()'>name " + nameArrow + "</th><th onclick='sortYear()'>year " + yearArrow + "</th><tr>";
for (let i = 0; i < cars.length; i++) {
txt += "<tr><td>"+ cars[i].type + "</td><td>" + cars[i].year + "</td></tr>";
}
txt += "</table>";
document.getElementById("demo").innerHTML = txt;
}
</script>
</body>
</html>
我非常感谢接受的答案和jedwards 的修复,但我也发现它们的可读性很差。所以这是我的重构和详细版本:
// Remember that strings are false positives for isNaN
const isEmptyOrNaN = (obj) => obj === "" || isNaN(obj);
const getCellValueInColumn = (tr, columnIdx) =>
tr.children[columnIdx].innerText || tr.children[columnIdx].textContent;
const compareCellValues = (cellValue1, cellValue2) => {
return isEmptyOrNaN(cellValue1) || isEmptyOrNaN(cellValue2)
? cellValue1.toString().localeCompare(cellValue2)
: cellValue1 - cellValue2;
};
const compareFnFactory = (columnIdx, ascending) => (firstEl, secondEl) => {
const cellValue1 = getCellValueInColumn(firstEl, columnIdx);
const cellValue2 = getCellValueInColumn(secondEl, columnIdx);
return ascending
? compareCellValues(cellValue1, cellValue2)
: compareCellValues(cellValue2, cellValue1);
};
document.querySelectorAll("th").forEach((th) =>
th.addEventListener("click", () => {
const table = th.closest("table");
const tbody = table.querySelector("tbody");
const columnIdx = Array.from(th.parentNode.children).indexOf(th);
const compareFn = compareFnFactory(columnIdx, (this.ascending = !this.ascending));
Array.from(tbody.querySelectorAll("tr"))
.sort(compareFn)
.forEach((tr) => tbody.appendChild(tr));
})
);
如果您发现任何多余的空格或括号、不必要的缩进等,那是因为我已将代码格式化为更漂亮。
我已将此代码包装在一个:
javascript: (function () {
// Code here
})();
并将其放入书签中,所以现在我可以在 Keycloak 管理控制台中对列进行排序。