英文:
How to add labels to dropdown menu if the select options are coming from datatables javascript?
问题
我正在使用一个带有下拉筛选器的数据表格进行项目，其中我正在动态从数据表格中填充下拉菜单。自动化的508合规性工具显示了以下错误，针对3个下拉菜单：“没有可访问名称的元素：(3)”。它还提供了以下网站的链接，说明如何修复此错误。https://www.ssa.gov/accessibility/andi/help/alerts.html?no_name_form_element。
我不确定如何添加标签，因为我没有在HTML中定义选择选项。它是来自JavaScript的。请参见下面的代码。任何指导都将非常有帮助。谢谢。
英文:
I am using a datatable with dropdown filter for my project where I am popoluating the dropdown menu dynamically from the datatable. Automated 508 complaince tool is throwing the following error for the 3 dropdowns- "Elements with No Accessible Name: (3)". It also provides link to the following site on how to fix the error. https://www.ssa.gov/accessibility/andi/help/alerts.html?no_name_form_element.
I am not sure how to add labels since I am not defining the select options in the HTML. It is coming from Javascipt. Please see the code below.
Any guidance will be very helpful. Thanks.
https://live.datatables.net/finezici/1/edit
<!-- begin snippet: js hide: false console: true babel: false -->
<!-- language: lang-js -->
$(document).ready(function() {
$('#table-wrap').hide();
var table = $('#example').DataTable({
responsive: true,
mark: true,
stateSave: false,
searching: true
});
buildSelect(table);
$('#table-filter').on('change', function () {
// show the tbody when the user clicks on a filter option
$('#table-wrap').show();
table.columns.adjust();
table.search(this.value).draw();
});
table.on('draw', function() {
buildSelect(table);
});
$('#test').on('click', function() {
table.search('').columns().search('').draw();
$('#table-wrap').hide();
});
});
function buildSelect(table) {
var counter = 0;
table.columns([0, 1, 2]).every(function() {
var column = table.column(this, {
search: 'applied'
});
counter++;
var select = $('<select><option value="">Select</option></select>')
.appendTo($('#dropdown' + counter).empty())
.on('change', function() {
var val = $.fn.dataTable.util.escapeRegex(
$(this).val()
);
column
.search(val ? '^' + val + '$' : '', true, false)
.draw();
});
column.data().unique().sort().each(function(d, j) {
select.append('<option value="' + d + '">' + d + '</option>');
});
// The rebuild will clear the exisiting select, so it needs to be repopulated
var currSearch = column.search();
if (currSearch) {
// Use RegEx to find the selected value from the unique values of the column.
// This will use the Regular Expression returned from column.search to find the first matching item in column.data().unique
select.val(column.data().unique().toArray().find((e) => e.match(new RegExp(currSearch))));
}
});
}
<!-- language: lang-html -->
<!DOCTYPE html>
<html>
<head>
<script src="https://code.jquery.com/jquery-1.11.3.min.js"></script>
<link href="https://nightly.datatables.net/css/jquery.dataTables.css" rel="stylesheet" type="text/css" />
<script src="https://nightly.datatables.net/js/jquery.dataTables.js"></script>
<meta charset=utf-8 />
<title>DataTables - JS Bin</title>
</head>
<div class="searchbox" select id="table-filter">
<p>Name: <span id="dropdown1">
</span>
</p>
<p>Postion: <span id="dropdown2">
</span>
</p>
<p>Office: <span id="dropdown3">
</span>
</p>
<button type="button" id="test">Clear Filters</button>
</div>
<div id="table-wrap">
<table id="example" class="cell-border row-border stripe dataTable no-footer dtr-inline" role="grid" style=" width: 100%; padding-top: 10px;"><thead>
<tr>
<th>&#160;</th>
<th>&#160;</th>
<th>&#160;</th>
<th colspan="3" style=" text-align: center;">Information</th>
</tr>
<tr>
<th>Name</th>
<th>Position</th>
<th>Office</th>
<th>Age</th>
<th>Start date</th>
<th>Salary</th>
</tr>
</thead>
<tbody>
<tr>
<td>ID.AI</td>
<td>System Architect</td>
<td>Edinburgh</td>
<td>61</td>
<td>2011/04/25</td>
<td>$3,120</td>
</tr>
<tr>
<td>Garrett -2</td>
<td>Director</td>
<td>Edinburgh</td>
<td>63</td>
<td>2011/07/25</td>
<td>$5,300</td>
</tr>
<tr>
<td>Ashton.1 -2</td>
<td>Technical Author</td>
<td>San Francisco</td>
<td>66</td>
<td>2009/01/12</td>
<td>$4,800</td>
</tr>
</tr></tbody></table>
</div>
<!-- end snippet -->
答案1
得分: 1
它要求你为下拉菜单添加标签。要为label添加for属性，你需要为下拉菜单设置ID。
你可以在js中设置它，如下所示：
var select = $('<select id="dd' + counter + '"><option value="">Select</option></select>')
然后，你需要在label标签中使用动态生成的ID包装你的标签，看起来像这样：链接
英文:
It is asking you to give labels for your dropdowns. To add the label for attribute you need IDs for dropdowns.
You can set it in your js as with var select = $('<select id="dd' + counter + '"><option value="">Select</option></select>')
Then you need to wrap your labels in a <label> tag using the dynamically generated ID in the for attribute.
Here is what it will look like: https://live.datatables.net/finezici/4/edit
<!-- begin snippet: js hide: false console: true babel: null -->
<!-- language: lang-js -->
$(document).ready(function() {
$('#table-wrap').hide();
var table = $('#example').DataTable({
responsive: true,
mark: true,
stateSave: false,
searching: true
});
buildSelect(table);
$('#table-filter').on('change', function () {
// show the tbody when the user clicks on a filter option
$('#table-wrap').show();
table.columns.adjust();
table.search(this.value).draw();
});
table.on('draw', function() {
buildSelect(table);
});
$('#test').on('click', function() {
table.search('').columns().search('').draw();
$('#table-wrap').hide();
});
});
function buildSelect(table) {
var counter = 0;
table.columns([0, 1, 2]).every(function() {
var column = table.column(this, {
search: 'applied'
});
counter++;
var select = $('<select id="dd' + counter + '"><option value="">Select</option></select>')
.appendTo($('#dropdown' + counter).empty())
.on('change', function() {
var val = $.fn.dataTable.util.escapeRegex(
$(this).val()
);
column
.search(val ? '^' + val + '$' : '', true, false)
.draw();
});
column.data().unique().sort().each(function(d, j) {
select.append('<option value="' + d + '">' + d + '</option>');
});
// The rebuild will clear the exisiting select, so it needs to be repopulated
var currSearch = column.search();
if (currSearch) {
// Use RegEx to find the selected value from the unique values of the column.
// This will use the Regular Expression returned from column.search to find the first matching item in column.data().unique
select.val(column.data().unique().toArray().find((e) => e.match(new RegExp(currSearch))));
}
});
}
<!-- language: lang-html -->
<!DOCTYPE html>
<html>
<head>
<script src="https://code.jquery.com/jquery-1.11.3.min.js"></script>
<link href="https://nightly.datatables.net/css/jquery.dataTables.css" rel="stylesheet" type="text/css" />
<script src="https://nightly.datatables.net/js/jquery.dataTables.js"></script>
<meta charset=utf-8 />
<title>DataTables - JS Bin</title>
</head>
<div class="searchbox" select id="table-filter">
<p><label for="dd1">Name:</label> <span id="dropdown1">
</span>
</p>
<p><label for="dd2">Postion:</label> <span id="dropdown2">
</span>
</p>
<p><label for="dd3">Office:</label> <span id="dropdown3">
</span>
</p>
<button type="button" id="test">Clear Filters</button>
</div>
<div id="table-wrap">
<table id="example" class="cell-border row-border stripe dataTable no-footer dtr-inline" role="grid" style=" width: 100%; padding-top: 10px;"><thead>
<tr>
<th>&#160;</th>
<th>&#160;</th>
<th>&#160;</th>
<th colspan="3" style=" text-align: center;">Information</th>
</tr>
<tr>
<th>Name</th>
<th>Position</th>
<th>Office</th>
<th>Age</th>
<th>Start date</th>
<th>Salary</th>
</tr>
</thead>
<tbody>
<tr>
<td>ID.AI</td>
<td>System Architect</td>
<td>Edinburgh</td>
<td>61</td>
<td>2011/04/25</td>
<td>$3,120</td>
</tr>
<tr>
<td>Garrett -2</td>
<td>Director</td>
<td>Edinburgh</td>
<td>63</td>
<td>2011/07/25</td>
<td>$5,300</td>
</tr>
<tr>
<td>Ashton.1 -2</td>
<td>Technical Author</td>
<td>San Francisco</td>
<td>66</td>
<td>2009/01/12</td>
<td>$4,800</td>
</tr>
</tr></tbody></table>
</div>
<!-- end snippet -->
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