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keyboard-filters.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Filter Badge Component</title>
<style>
* {
box-sizing: border-box;
}
body {
font-family: Helvetica, Arial, sans-serif;
margin: 0;
padding: 20px;
background-color: #f5f5f5;
color: #333;
}
.filters-container {
background-color: white;
border-radius: 8px;
padding: 20px;
box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
.filter-badges {
display: flex;
flex-wrap: wrap;
gap: 10px;
margin-bottom: 20px;
}
.filter-badge {
display: flex;
align-items: center;
background-color: #f0f7ff;
border: 1px solid #cce0ff;
border-radius: 20px;
overflow: hidden;
height: 36px;
transition: box-shadow 0.2s ease;
}
.filter-badge:hover {
box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
.filter-badge-part {
padding: 0 10px;
height: 100%;
display: flex;
align-items: center;
cursor: pointer;
}
.filter-badge-column {
font-weight: 500;
background-color: #e0f0ff;
border-right: 1px solid #cce0ff;
min-width: auto;
width: auto;
position: relative;
white-space: nowrap;
padding: 0 12px;
}
.filter-badge-operator {
min-width: 40px;
width: auto;
padding: 0 8px;
justify-content: center;
background-color: #f0f7ff;
border-right: 1px solid #cce0ff;
position: relative;
white-space: nowrap;
}
.filter-badge-value {
padding: 0 12px;
background-color: #f8faff;
flex-grow: 1; /* Allow this to grow to take available space */
}
.filter-badge-remove {
width: 28px;
justify-content: center;
font-size: 16px;
color: #999;
background-color: #f8faff;
border-left: 1px solid #cce0ff;
transition: background-color 0.2s ease;
margin-left: auto; /* Push to the right end */
}
.filter-badge-remove:hover {
background-color: #ffeeee;
color: #ff5555;
}
.dropdown-select {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
opacity: 0;
cursor: pointer;
}
.add-filter-badge {
display: inline-flex;
align-items: center;
background-color: #f0f7ff;
border: 1px dashed #99c2ff;
border-radius: 20px;
height: 36px;
padding: 0 15px;
color: #3377cc;
cursor: pointer;
transition: background-color 0.2s ease;
width: auto;
}
.add-filter-badge:hover {
background-color: #e0f0ff;
}
.add-filter-badge span {
font-size: 20px;
margin-right: 5px;
}
.filter-popover {
position: absolute;
background: white;
border-radius: 8px;
box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
padding: 15px;
z-index: 100;
min-width: 220px;
display: none;
}
.filter-popover.active {
display: block;
}
.filter-popover:after {
content: '';
position: absolute;
top: -8px;
left: 20px;
width: 16px;
height: 16px;
background: white;
transform: rotate(45deg);
box-shadow: -2px -2px 4px rgba(0, 0, 0, 0.05);
}
.popover-title {
font-weight: 500;
margin-bottom: 10px;
font-size: 14px;
color: #666;
}
input[type="text"] {
width: 100%;
padding: 8px 12px;
border: 1px solid #ddd;
border-radius: 4px;
font-family: Helvetica, Arial, sans-serif;
font-size: 16px;
}
.popover-actions {
display: flex;
justify-content: flex-end;
margin-top: 10px;
gap: 8px;
}
button {
padding: 8px 12px;
border: none;
border-radius: 4px;
font-family: Helvetica, Arial, sans-serif;
font-size: 14px;
cursor: pointer;
}
button.primary {
background-color: #3377cc;
color: white;
}
button.secondary {
background-color: #f0f0f0;
color: #666;
}
/* Keyboard focus styles */
.filter-badge-part:focus-within {
outline: 2px solid #4d90fe;
outline-offset: -2px;
}
.add-filter-badge:focus {
outline: 2px solid #4d90fe;
outline-offset: 2px;
}
.dropdown-select:focus {
outline: none; /* Remove default outline as we're styling the parent */
}
button:focus {
outline: 2px solid #4d90fe;
outline-offset: 2px;
}
input[type="text"]:focus {
outline: 2px solid #4d90fe;
border-color: #4d90fe;
}
@media (max-width: 600px) {
.filter-badges {
flex-direction: column;
align-items: flex-start;
}
.filter-badge {
width: 100%;
justify-content: space-between; /* Ensure space distribution */
}
.filter-badge-value {
flex-grow: 1; /* Allow value to grow */
}
.filter-badge-remove {
margin-left: auto; /* Always push to end */
}
}
</style>
</head>
<body>
<h1>Keyboard accessible filter prototype</h1>
<div class="filters-container">
<div class="filter-badges" id="filterBadges">
<!-- Filter badges will be generated here -->
</div>
<div class="add-filter-badge" id="addFilterBadge" tabindex="0" role="button" aria-label="Add filter">
<span>+</span> Add filter
</div>
</div>
<!-- Value Popover -->
<div class="filter-popover" id="valuePopover">
<div class="popover-title">Enter value</div>
<input type="text" id="valueInput" aria-label="Filter value">
<div class="popover-actions">
<button class="secondary" id="cancelButton" onclick="closeValuePopover()">Cancel</button>
<button class="primary" id="applyValueButton">Apply</button>
</div>
</div>
<script type="module">
// Initial filter data
const filters = [
{
id: 1,
column: 'award_number',
operator: 'gt',
value: '5'
},
{
id: 2,
column: 'rowid',
operator: 'exact',
value: '4'
}
];
// Current active filter being edited
let activeFilter = null;
let lastFocusedElementId = null; // Track the last focused element
// DOM references
const filterBadgesContainer = document.getElementById('filterBadges');
const addFilterBadge = document.getElementById('addFilterBadge');
const valuePopover = document.getElementById('valuePopover');
// Operator display mapping
const operatorDisplay = {
'exact': '=',
'not': '!=',
'contains': 'contains',
'notcontains': 'does not contain',
'endswith': 'ends with',
'startswith': 'starts with',
'gt': '>',
'gte': '≥',
'lt': '<',
'lte': '≤',
'like': 'like',
'notlike': 'not like',
'glob': 'glob',
'in': 'in',
'notin': 'not in',
'arraycontains': 'array contains',
'arraynotcontains': 'array does not contain',
'date': 'date',
'isnull__1': 'is null',
'notnull__1': 'is not null',
'isblank__1': 'is blank',
'notblank__1': 'is not blank'
};
// Initialize the UI
function initUI() {
renderFilterBadges();
setupEventListeners();
}
// Render filter badges
function renderFilterBadges() {
// Save focus state before re-rendering
saveCurrentFocus();
filterBadgesContainer.innerHTML = '';
filters.forEach(filter => {
const badge = document.createElement('div');
badge.className = 'filter-badge';
badge.dataset.id = filter.id;
// Create unique identifiers for each focusable element
const columnId = `filter-column-${filter.id}`;
const operatorId = `filter-operator-${filter.id}`;
const valueId = `filter-value-${filter.id}`;
const removeId = `filter-remove-${filter.id}`;
badge.innerHTML = `
<div id="${columnId}" class="filter-badge-part filter-badge-column" data-id="${filter.id}">
${filter.column}
<select class="dropdown-select" data-id="${filter.id}" tabindex="0" aria-label="Select column">
<option value="">- remove filter -</option>
<option value="rowid">rowid</option>
<option value="award_number">award_number</option>
<option value="group">group</option>
<option value="award_title">award_title</option>
<option value="type">type</option>
<option value="keywords">keywords</option>
</select>
</div>
<div id="${operatorId}" class="filter-badge-part filter-badge-operator" data-id="${filter.id}">
${operatorDisplay[filter.operator] || filter.operator}
<select class="dropdown-select" data-id="${filter.id}" tabindex="0" aria-label="Select operator">
<option value="exact">=</option>
<option value="not">!=</option>
<option value="contains">contains</option>
<option value="notcontains">does not contain</option>
<option value="endswith">ends with</option>
<option value="startswith">starts with</option>
<option value="gt">></option>
<option value="gte">≥</option>
<option value="lt"><</option>
<option value="lte">≤</option>
<option value="like">like</option>
<option value="notlike">not like</option>
<option value="glob">glob</option>
<option value="in">in</option>
<option value="notin">not in</option>
<option value="arraycontains">array contains</option>
<option value="arraynotcontains">array does not contain</option>
<option value="date">date</option>
<option value="isnull__1">is null</option>
<option value="notnull__1">is not null</option>
<option value="isblank__1">is blank</option>
<option value="notblank__1">is not blank</option>
</select>
</div>
<div id="${valueId}" class="filter-badge-part filter-badge-value" data-id="${filter.id}" tabindex="0" role="button" aria-label="Edit value">${filter.value}</div>
<div id="${removeId}" class="filter-badge-part filter-badge-remove" data-id="${filter.id}" tabindex="0" role="button" aria-label="Remove filter">×</div>
`;
filterBadgesContainer.appendChild(badge);
// Set the select values to match the current filter
const columnSelect = badge.querySelector('.filter-badge-column select');
const operatorSelect = badge.querySelector('.filter-badge-operator select');
if (columnSelect) columnSelect.value = filter.column;
if (operatorSelect) operatorSelect.value = filter.operator;
});
// Restore focus after re-rendering
restoreFocus();
}
// Save current focused element
function saveCurrentFocus() {
const activeElement = document.activeElement;
if (activeElement && activeElement.closest('.filter-badge')) {
lastFocusedElementId = activeElement.id ||
activeElement.closest('[id]')?.id ||
activeElement.closest('[data-id]')?.dataset.id;
}
}
// Restore focus to the previously focused element
function restoreFocus() {
if (lastFocusedElementId) {
const elementToFocus = document.getElementById(lastFocusedElementId);
if (elementToFocus) {
setTimeout(() => {
elementToFocus.focus();
}, 0);
}
}
}
// Setup event listeners
function setupEventListeners() {
// Track focus events
document.addEventListener('focusin', (e) => {
if (e.target.closest('.filter-badge') || e.target.closest('.add-filter-badge')) {
const element = e.target.closest('[id]');
if (element) {
lastFocusedElementId = element.id;
}
}
});
// Add filter badge
addFilterBadge.addEventListener('click', () => {
const newFilter = {
id: Date.now(),
column: 'rowid',
operator: 'exact',
value: ''
};
filters.push(newFilter);
renderFilterBadges();
// Auto-focus the column select of the new filter
setTimeout(() => {
const columnId = `filter-column-${newFilter.id}`;
const columnElement = document.getElementById(columnId);
if (columnElement) {
const columnSelect = columnElement.querySelector('select');
if (columnSelect) {
columnSelect.focus();
lastFocusedElementId = columnId;
}
}
}, 50);
});
// Add keyboard support for "add filter" button
addFilterBadge.addEventListener('keydown', (e) => {
if (e.key === 'Enter' || e.key === ' ') {
e.preventDefault();
addFilterBadge.click();
}
});
// Handle column select change
document.addEventListener('change', (e) => {
if (e.target.classList.contains('dropdown-select') && e.target.parentElement.classList.contains('filter-badge-column')) {
const id = parseInt(e.target.dataset.id);
const filter = filters.find(f => f.id === id);
if (filter) {
filter.column = e.target.value;
// If empty column is selected, remove the filter
if (!filter.column) {
removeFilter(id);
return;
}
// Update the display text without full re-render
e.target.parentElement.childNodes[0].textContent = filter.column;
}
}
});
// Handle operator select change
document.addEventListener('change', (e) => {
if (e.target.classList.contains('dropdown-select') && e.target.parentElement.classList.contains('filter-badge-operator')) {
const id = parseInt(e.target.dataset.id);
const filter = filters.find(f => f.id === id);
if (filter) {
filter.operator = e.target.value;
// Update the display text without full re-render
e.target.parentElement.childNodes[0].textContent = operatorDisplay[filter.operator] || filter.operator;
}
}
});
// Filter badge value click
document.addEventListener('click', (e) => {
if (e.target.classList.contains('filter-badge-value')) {
const id = parseInt(e.target.dataset.id);
activeFilter = filters.find(f => f.id === id);
showValuePopover(e.target);
}
});
// Filter badge value keyboard
document.addEventListener('keydown', (e) => {
if (e.target.classList.contains('filter-badge-value')) {
// Open popover on Enter/Space
if (e.key === 'Enter' || e.key === ' ') {
e.preventDefault();
const id = parseInt(e.target.dataset.id);
activeFilter = filters.find(f => f.id === id);
showValuePopover(e.target);
}
// Open popover on any typing (except navigation keys)
else if (
e.key.length === 1 || // Single character keys
e.key === 'Backspace' ||
e.key === 'Delete'
) {
e.preventDefault();
const id = parseInt(e.target.dataset.id);
activeFilter = filters.find(f => f.id === id);
showValuePopover(e.target);
// After popover is open, forward the typed character to the input
setTimeout(() => {
const valueInput = document.getElementById('valueInput');
if (valueInput) {
if (e.key.length === 1) {
// For printable characters, set the input value to that character
valueInput.value = e.key;
// Position cursor at the end
valueInput.selectionStart = valueInput.selectionEnd = valueInput.value.length;
} else if (e.key === 'Backspace' || e.key === 'Delete') {
// For delete keys, start with empty value
valueInput.value = '';
}
}
}, 10);
}
}
});
// Filter badge remove click
document.addEventListener('click', (e) => {
if (e.target.classList.contains('filter-badge-remove')) {
const id = parseInt(e.target.dataset.id);
removeFilter(id);
}
});
// Filter badge remove keyboard
document.addEventListener('keydown', (e) => {
if ((e.key === 'Enter' || e.key === ' ') && e.target.classList.contains('filter-badge-remove')) {
e.preventDefault();
const id = parseInt(e.target.dataset.id);
removeFilter(id);
}
});
// Apply value button
document.getElementById('applyValueButton').addEventListener('click', () => {
applyValueChange();
});
// Cancel button
document.getElementById('cancelButton').addEventListener('click', () => {
closeValuePopover();
});
// Enter key in value input
document.getElementById('valueInput').addEventListener('keydown', (e) => {
if (e.key === 'Enter') {
e.preventDefault();
applyValueChange();
}
if (e.key === 'Escape') {
closeValuePopover();
}
});
// Close popovers when clicking outside
document.addEventListener('click', (e) => {
const isPopover = e.target.closest('.filter-popover');
const isFilterValue = e.target.classList.contains('filter-badge-value');
if (!isPopover && !isFilterValue) {
closeValuePopover();
}
});
}
// Show value popover
function showValuePopover(targetElement) {
// If popover is already active, don't reinitialize
if (valuePopover.classList.contains('active')) {
return;
}
const rect = targetElement.getBoundingClientRect();
// Calculate available space on the right
const viewportWidth = window.innerWidth;
const rightSpace = viewportWidth - rect.left - window.scrollX;
// Check if there's enough space to the right
if (rightSpace < 250) { // 250px is approximate popover width
// Not enough space on right, position to the left of target
valuePopover.style.left = `${Math.max(rect.left + window.scrollX - 200, 10)}px`;
} else {
// Enough space on right, position at target left
valuePopover.style.left = `${rect.left + window.scrollX}px`;
}
valuePopover.style.top = `${rect.bottom + window.scrollY + 10}px`;
// Set the current value
const valueInput = document.getElementById('valueInput');
if (activeFilter && activeFilter.value) {
valueInput.value = activeFilter.value;
} else {
valueInput.value = '';
}
valuePopover.classList.add('active');
valueInput.focus();
}
// Close value popover
function closeValuePopover() {
valuePopover.classList.remove('active');
// Return focus to the value element that opened it
if (activeFilter) {
const valueId = `filter-value-${activeFilter.id}`;
const valueElement = document.getElementById(valueId);
if (valueElement) {
valueElement.focus();
lastFocusedElementId = valueId;
}
}
}
// Apply value change
function applyValueChange() {
const valueInput = document.getElementById('valueInput');
if (activeFilter) {
activeFilter.value = valueInput.value;
// Update the display text without full re-render
const valueId = `filter-value-${activeFilter.id}`;
const valueElement = document.getElementById(valueId);
if (valueElement) {
valueElement.textContent = activeFilter.value;
closeValuePopover();
valueElement.focus();
lastFocusedElementId = valueId;
} else {
closeValuePopover();
}
}
}
// Remove filter
function removeFilter(id) {
const index = filters.findIndex(f => f.id === id);
if (index !== -1) {
// Find next filter to focus on
let nextFocusFilter;
if (index < filters.length - 1) {
nextFocusFilter = filters[index + 1];
} else if (index > 0) {
nextFocusFilter = filters[index - 1];
}
// Remove the filter
filters.splice(index, 1);
// Render and set focus
renderFilterBadges();
// If there are no filters left, focus the add button
if (filters.length === 0) {
addFilterBadge.focus();
lastFocusedElementId = addFilterBadge.id;
}
// Otherwise focus a related filter
else if (nextFocusFilter) {
const columnId = `filter-column-${nextFocusFilter.id}`;
const columnElement = document.getElementById(columnId);
if (columnElement) {
columnElement.focus();
lastFocusedElementId = columnId;
}
}
}
}
// Initialize the UI
initUI();
// Expose for the cancel button
window.closeValuePopover = closeValuePopover;
</script>
</body>
</html>