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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

HTML

            
              <label for="select-el" class="combo-label">Native select element</label>
  <select id="select-el" class="combo combo-input" multiple>
    <option>Apple</option>
    <option>Apricot</option>
    <option>Banana</option>
    <option>Blackberry</option>
    <option>Blueberry</option>
    <option>Cantaloupe</option>
    <option>Cherry</option>
    <option>Date</option>
    <option>Durian</option>
    <option>Eggplant</option>
    <option>Fig</option>
    <option>Grape</option>
    <option>Guava</option>
    <option>Huckleberry</option>
  </select>

  <label for="combo1" class="combo-label">Multiselect with comma-separated values</label>
  <div class="combo js-csv">
    <div role="combobox" aria-haspopup="listbox" aria-expanded="false" aria-owns="listbox1" class="input-wrapper">
      <input
        aria-activedescendant=""
        aria-autocomplete="list"
        id="combo1"
        class="combo-input"
        type="text">
    </div>
    <div class="combo-menu" role="listbox" aria-multiselectable="true" id="listbox1"></div>
  </div>

  <label id="combo2-label" class="combo-label">Multiselect with buttons</label>
  <span id="combo2-remove" style="display: none">remove</span> <!-- used as descriptive text for option buttons; if used within the button text itself, it ends up being read with the input name -->
  <ul class="selected-options" id="combo2-selected"></ul>
  <div class="combo js-multi-buttons">
    <div role="combobox" aria-haspopup="listbox" aria-expanded="false" aria-owns="listbox2" class="input-wrapper">
      <input
        aria-activedescendant=""
        aria-autocomplete="list"
        aria-labelledby="combo2-label combo2-selected"
        id="combo2"
        class="combo-input"
        type="text">
    </div>
    <div class="combo-menu" role="listbox" aria-multiselectable="true" id="listbox2"></div>
  </div>

  <label id="combo3-label" class="combo-label">Multiselect with inline buttons</label>
  <span id="combo3-remove" style="display: none">remove</span> <!-- used as descriptive text for option buttons; if used within the button text itself, it ends up being read with the input name -->
  <div class="combo js-inline-buttons">
    <div role="combobox" aria-haspopup="listbox" aria-expanded="false" aria-owns="listbox3" class="input-wrapper multiselect-inline">
      <ul class="selected-options" aria-live="assertive" aria-atomic="false" aria-relevant="additions removals" id="combo3-selected"></ul>
      <input
        aria-activedescendant=""
        aria-autocomplete="list"
        aria-labelledby="combo3-label combo3-selected"
        id="combo3"
        class="combo-input"
        type="text">
    </div>
    <div class="combo-menu" role="listbox" aria-multiselectable="true" id="listbox3"></div>
  </div>
            
          
!

CSS

            
              *, *::before, *::after {
  box-sizing: border-box;
}

body {
  background-color: #f5f5f5;
  font-family: "Segoe UI", SegoeUI, "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 120%;
  line-height: 1.4;
  margin: 0;
  padding: 2em;
}

.combo {
  display: block;
  margin-bottom: 1.5em;
  max-width: 400px;
  position: relative;
}

.combo::after {
  border-bottom: 2px solid rgba(0,0,0,.5);
  border-right: 2px solid rgba(0,0,0,.5);
  content: '';
  display: block;
  height: 12px;
  pointer-events: none;
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translate(0, -65%) rotate(45deg);
  width: 12px;
}

.input-wrapper {
  border-radius: 4px;
}

.combo-input {
  background-color: #f5f5f5;
  border: 2px solid rgba(0,0,0,.5);
  border-radius: 4px;
  display: block;
  font-size: 1em;
  min-height: calc(1.4em + 26px);
  padding: 12px 16px 14px;
  text-align: left;
  width: 100%;
}

select.combo-input {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
}

.open .combo-input {
  border-radius: 4px 4px 0 0;
}

.combo-input:focus {
  border-color: #0067b8;
  box-shadow: 0 0 4px 2px #0067b8;
  outline: 5px solid transparent;
}

.combo-label {
  display: block;
  font-size: 20px;
  font-weight: 100;
  margin-bottom: 0.25em;
}

.combo-menu {
  background-color: #f5f5f5;
  border: 1px solid rgba(0,0,0,.42);
  border-radius: 0 0 4px 4px;
  display: none;
  max-height: 300px;
  overflow-y:scroll;
  left: 0;
  position: absolute;
  top: 100%;
  width: 100%;
  z-index: 100;
}

.open .combo-menu {
  display: block;
}

.combo-option {
  padding: 10px 12px 12px;
}

.combo-option.option-current,
.combo-option:hover {
  background-color: rgba(0,0,0,0.1);
}

.combo-option.option-selected {
  padding-right: 30px;
  position: relative;
}

.combo-option.option-selected::after {
  border-bottom: 2px solid #000;
  border-right: 2px solid #000;
  content: '';
  height: 16px;
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translate(0, -50%) rotate(45deg);
  width: 8px;
}

/* multiselect list of selected options */
.selected-options {
  list-style-type: none;
  margin: 0;
  max-width: 400px;
  padding: 0;
}

.selected-options li {
  display: inline-block;
  margin-bottom: 5px;
}

.remove-option {
  background-color: #6200ee;
  border: 1px solid #6200ee;
  border-radius: 3px;
  color: #fff;
  font-size: 0.75em;
  font-weight: bold;
  margin-bottom: 6px;
  margin-right: 6px;
  padding: 0.25em 1.75em 0.25em 0.25em;
  position: relative;
}

.remove-option:focus {
  border-color: #baa1dd;
  box-shadow: 0 0 3px 1px #6200ee;
  outline: 3px solid transparent;
}

.remove-option::before,
.remove-option::after {
  border-right: 2px solid #fff;
  content: "";
  height: 1em;
  right: 0.75em;
  position: absolute;
  top: 50%;
  width: 0;
}

.remove-option::before {
  transform: translate(0, -50%) rotate(45deg);
}

.remove-option::after {
  transform: translate(0, -50%) rotate(-45deg);
}


.multiselect-inline {
  align-items: center;
  background-color: #f5f5f5;
  border: 2px solid rgba(0,0,0,.42);
  border-radius: 4px;
  display: flex;
  flex-wrap: wrap;
  min-height: calc(1.4em + 26px);
  padding: 12px 16px 14px;
}

.multiselect-inline .selected-options {
  flex: 0 1 auto;
}

.multiselect-inline .selected-options li {
  margin-bottom: 0;
}

.multiselect-inline .combo-input {
  border: none;
  flex: 1 1 35%;
  min-height: calc(1.4em - 2px);
  padding: 0;
}

.multiselect-inline .combo-input:focus {
  box-shadow: none;
  outline: none;
}

.multiselect-inline:focus-within {
  box-shadow: 0 0 3px 2px #0067b8;
  outline: 5px solid transparent;
}
            
          
!

JS

            
              // options for all examples
const options = ['Apple', 'Apricot', 'Banana', 'Blackberry', 'Blueberry', 'Cantaloupe', 'Cherry', 'Date', 'Durian', 'Eggplant', 'Fig', 'Grape', 'Guava', 'Huckleberry'];

/*
 * Helper constants and functions
 */

// make it easier for ourselves by putting some values in objects
// in TypeScript, these would be enums
const Keys = {
  Backspace: 'Backspace',
  Clear: 'Clear',
  Down: 'ArrowDown',
  End: 'End',
  Enter: 'Enter',
  Escape: 'Escape',
  Home: 'Home',
  Left: 'ArrowLeft',
  PageDown: 'PageDown',
  PageUp: 'PageUp',
  Right: 'ArrowRight',
  Space: ' ',
  Tab: 'Tab',
  Up: 'ArrowUp'
}

const MenuActions = {
  Close: 0,
  CloseSelect: 1,
  First: 2,
  Last: 3,
  Next: 4,
  Open: 5,
  Previous: 6,
  Select: 7,
  Space: 8,
  Type: 9
}

// filter an array of options against an input string
// returns an array of options that begin with the filter string, case-independent
function filterOptions(options = [], filter, exclude = []) {
  return options.filter((option) => {
    const matches = option.toLowerCase().indexOf(filter.toLowerCase()) === 0;
    return matches && exclude.indexOf(option) < 0;
  });
}

// return an array of exact option name matches from a comma-separated string
function findMatches(options, search) {
  const names = search.split(',');
  return names.map((name) => {
    const match = options.filter((option) => name.trim().toLowerCase() === option.toLowerCase());
    return match.length > 0 ? match[0] : null;
  })
  .filter((option) => option !== null);
}

// return combobox action from key press
function getActionFromKey(key, menuOpen) {
  // handle opening when closed
  if (!menuOpen && key === Keys.Down) {
    return MenuActions.Open;
  }

  // handle keys when open
  if (key === Keys.Down) {
    return MenuActions.Next;
  }
  else if (key === Keys.Up) {
    return MenuActions.Previous;
  }
  else if (key === Keys.Home) {
    return MenuActions.First;
  }
  else if (key === Keys.End) {
    return MenuActions.Last;
  }
  else if (key === Keys.Escape) {
    return MenuActions.Close;
  }
  else if (key === Keys.Enter) {
    return MenuActions.CloseSelect;
  }
  else if (key === Keys.Backspace || key === Keys.Clear || key.length === 1) {
    return MenuActions.Type;
  }
}

// get index of option that matches a string
function getIndexByLetter(options, filter) {
  const firstMatch = filterOptions(options, filter)[0];
  return firstMatch ? options.indexOf(firstMatch) : -1;
}

// get updated option index
function getUpdatedIndex(current, max, action) {
  switch(action) {
    case MenuActions.First:
      return 0;
    case MenuActions.Last:
      return max;
    case MenuActions.Previous:
      return Math.max(0, current - 1);
    case MenuActions.Next:
      return Math.min(max, current + 1);
    default:
      return current;
  }
}

// check if an element is currently scrollable
function isScrollable(element) {
  return element && element.clientHeight < element.scrollHeight;
}

// ensure given child element is within the parent's visible scroll area
function maintainScrollVisibility(activeElement, scrollParent) {
  const { offsetHeight, offsetTop } = activeElement;
  const { offsetHeight: parentOffsetHeight, scrollTop } = scrollParent;

  const isAbove = offsetTop < scrollTop;
  const isBelow = (offsetTop + offsetHeight) > (scrollTop + parentOffsetHeight);

  if (isAbove) {
    scrollParent.scrollTo(0, offsetTop);
  }
  else if (isBelow) {
    scrollParent.scrollTo(0, offsetTop - parentOffsetHeight + offsetHeight);
  }
}

/*
 * Multiselect CSV code
 */
 const MultiselectCSV = function(el, options) {
  // element refs
  this.el = el;
  this.comboEl = el.querySelector('[role=combobox]');
  this.inputEl = el.querySelector('input');
  this.listboxEl = el.querySelector('[role=listbox]');

  // data
  this.idBase = this.inputEl.id;
  this.options = options;
  this.filteredOptions = options;
  this.selectedOptions = [];

  // state
  this.activeIndex = 0;
  this.open = false;
}

MultiselectCSV.prototype.init = function() {

  this.inputEl.addEventListener('input', this.onInput.bind(this));
  this.inputEl.addEventListener('blur', this.onInputBlur.bind(this));
  this.inputEl.addEventListener('click', () => this.updateMenuState(true));
  this.inputEl.addEventListener('keydown', this.onInputKeyDown.bind(this));

  this.options.map((option, index) => {
    const optionEl = document.createElement('div');
    optionEl.setAttribute('role', 'option');
    optionEl.id = `${this.idBase}-${index}`;
    optionEl.className = index === 0 ? 'combo-option option-current' : 'combo-option';
    optionEl.setAttribute('aria-selected', 'false');
    optionEl.innerText = option;

    optionEl.addEventListener('click', () => { this.onOptionClick(index); });
    optionEl.addEventListener('mousedown', this.onOptionMouseDown.bind(this));

    this.listboxEl.appendChild(optionEl);
  });
}

MultiselectCSV.prototype.filterOptions = function(value, excludeOptions = []) {
  this.filteredOptions = filterOptions(this.options, value, excludeOptions);

  // hide/show options based on filtering
  const options = this.el.querySelectorAll('[role=option]');
  [...options].forEach((optionEl) => {
    const value = optionEl.innerText;
    if (this.filteredOptions.indexOf(value) > -1) {
      optionEl.style.display = 'block';
    }
    else {
      optionEl.style.display = 'none';
    }
  });
}

MultiselectCSV.prototype.onInput = function() {
  const curValue = this.inputEl.value;
  const currentSearch = curValue.split(',').pop().replace(/^\s+/, '');
  const matchingOptions = findMatches(this.options, curValue);
  this.updateSelectedOptions(matchingOptions, false);
  this.filterOptions(currentSearch, this.selectedOptions);

  // if active option is not in filtered options, set it to first filtered option
  if (this.filteredOptions.indexOf(this.options[this.activeIndex]) < 0) {
    const firstFilteredIndex = Math.max(this.options.indexOf(this.filteredOptions[0]), 0);
    this.onOptionChange(firstFilteredIndex);
  }

  const menuState = this.filteredOptions.length > 0;
  if (this.open !== menuState) {
    this.updateMenuState(menuState, false);
  }
}

MultiselectCSV.prototype.onInputKeyDown = function(event) {
  const { key } = event;

  const max = this.filteredOptions.length - 1;
  const activeFilteredIndex = this.filteredOptions.indexOf(this.options[this.activeIndex]);

  const action = getActionFromKey(key, this.open);

  switch(action) {
    case MenuActions.Next:
    case MenuActions.Last:
    case MenuActions.First:
    case MenuActions.Previous:
      event.preventDefault();
      const nextFilteredIndex = getUpdatedIndex(activeFilteredIndex, max, action);
      const nextRealIndex = this.options.indexOf(this.filteredOptions[nextFilteredIndex]);
      return this.onOptionChange(nextRealIndex);
    case MenuActions.CloseSelect:
      event.preventDefault();
      this.updateOption(this.activeIndex);
      return this.updateMenuState(false);
    case MenuActions.Close:
      event.preventDefault();
      return this.updateMenuState(false);
    case MenuActions.Open:
      return this.updateMenuState(true);
  }
}

MultiselectCSV.prototype.onInputBlur = function() {
  if (this.ignoreBlur) {
    this.ignoreBlur = false;
    return;
  }

  if (this.open) {
    this.processInputString(this.inputEl.value);
    this.updateMenuState(false, false);
  }
}

MultiselectCSV.prototype.onOptionChange = function(index) {
  this.activeIndex = index;
  this.inputEl.setAttribute('aria-activedescendant', `${this.idBase}-${index}`);

  // update active style
  const options = this.el.querySelectorAll('[role=option]');
  [...options].forEach((optionEl) => {
    optionEl.classList.remove('option-current');
  });
  options[index].classList.add('option-current');

  if (this.open && isScrollable(this.listboxEl)) {
    maintainScrollVisibility(options[index], this.listboxEl);
  }
}

MultiselectCSV.prototype.onOptionClick = function(index) {
  this.onOptionChange(index);
  this.updateOption(index);
  this.inputEl.focus();
}

MultiselectCSV.prototype.onOptionMouseDown = function() {
  this.ignoreBlur = true;
}

MultiselectCSV.prototype.processInputString = function(inputString) {
  const options = findMatches(this.options, inputString);
  this.updateSelectedOptions(options, true);
}

MultiselectCSV.prototype.updateOption = function(index) {
  const option = this.options[index];
  const selectedIndex = this.selectedOptions.indexOf(option);
  const isSelected = selectedIndex > -1;
  this.filterOptions('');

  if (isSelected) {
    this.selectedOptions.splice(selectedIndex, 1);
    this.updateSelectedOptions(this.selectedOptions, true);
  }

  else {
    this.updateSelectedOptions([...this.selectedOptions, option], true);
  }
}

MultiselectCSV.prototype.updateMenuState = function(open, callFocus = true) {
  this.open = open;

  this.comboEl.setAttribute('aria-expanded', `${open}`);
  open ? this.el.classList.add('open') : this.el.classList.remove('open');
  callFocus && this.inputEl.focus();
}

MultiselectCSV.prototype.updateSelectedOptions = function(options, setInputValue) {
  this.selectedOptions = options;

  if (setInputValue) {
    this.inputEl.value = this.selectedOptions.join(', ');
  }

  // update aria-selected
  const optionEls = this.el.querySelectorAll('[role=option]');
  [...optionEls].forEach((optionEl) => {
    const optionSelected = this.selectedOptions.indexOf(optionEl.innerText) > -1;
    optionEl.setAttribute('aria-selected', `${optionSelected}`);
    optionSelected ? optionEl.classList.add('option-selected') : optionEl.classList.remove('option-selected');
  });

  this.filterOptions('');
}

// init combo
const csvEl = document.querySelector('.js-csv');
const csvComponent = new MultiselectCSV(csvEl, options);
csvComponent.init();

/*
 * Multiselect Combobox w/ Buttons code
 */
 const MultiselectButtons = function(el, options) {
  // element refs
  this.el = el;
  this.comboEl = el.querySelector('[role=combobox]');
  this.inputEl = el.querySelector('input');
  this.listboxEl = el.querySelector('[role=listbox]');

  this.idBase = this.inputEl.id;
  this.selectedEl = document.getElementById(`${this.idBase}-selected`);

  // data
  this.options = options;
  this.filteredOptions = options;

  // state
  this.activeIndex = 0;
  this.open = false;
}

MultiselectButtons.prototype.init = function() {

  this.inputEl.addEventListener('input', this.onInput.bind(this));
  this.inputEl.addEventListener('blur', this.onInputBlur.bind(this));
  this.inputEl.addEventListener('click', () => this.updateMenuState(true));
  this.inputEl.addEventListener('keydown', this.onInputKeyDown.bind(this));

  this.options.map((option, index) => {
    const optionEl = document.createElement('div');
    optionEl.setAttribute('role', 'option');
    optionEl.id = `${this.idBase}-${index}`;
    optionEl.className = index === 0 ? 'combo-option option-current' : 'combo-option';
    optionEl.setAttribute('aria-selected', 'false');
    optionEl.innerText = option;

    optionEl.addEventListener('click', () => { this.onOptionClick(index); });
    optionEl.addEventListener('mousedown', this.onOptionMouseDown.bind(this));

    this.listboxEl.appendChild(optionEl);
  });
}

MultiselectButtons.prototype.filterOptions = function(value) {
  this.filteredOptions = filterOptions(this.options, value);

  // hide/show options based on filtering
  const options = this.el.querySelectorAll('[role=option]');
  [...options].forEach((optionEl) => {
    const value = optionEl.innerText;
    if (this.filteredOptions.indexOf(value) > -1) {
      optionEl.style.display = 'block';
    }
    else {
      optionEl.style.display = 'none';
    }
  });
}

MultiselectButtons.prototype.onInput = function() {
  const curValue = this.inputEl.value;
  this.filterOptions(curValue);

  // if active option is not in filtered options, set it to first filtered option
  if (this.filteredOptions.indexOf(this.options[this.activeIndex]) < 0) {
    const firstFilteredIndex = this.options.indexOf(this.filteredOptions[0]);
    this.onOptionChange(firstFilteredIndex);
  }

  const menuState = this.filteredOptions.length > 0;
  if (this.open !== menuState) {
    this.updateMenuState(menuState, false);
  }
}

MultiselectButtons.prototype.onInputKeyDown = function(event) {
  const { key } = event;

  const max = this.filteredOptions.length - 1;
  const activeFilteredIndex = this.filteredOptions.indexOf(this.options[this.activeIndex]);

  const action = getActionFromKey(key, this.open);

  switch(action) {
    case MenuActions.Next:
    case MenuActions.Last:
    case MenuActions.First:
    case MenuActions.Previous:
      event.preventDefault();
      const nextFilteredIndex = getUpdatedIndex(activeFilteredIndex, max, action);
      const nextRealIndex = this.options.indexOf(this.filteredOptions[nextFilteredIndex]);
      return this.onOptionChange(nextRealIndex);
    case MenuActions.CloseSelect:
      event.preventDefault();
      return this.updateOption(this.activeIndex);
    case MenuActions.Close:
      event.preventDefault();
      return this.updateMenuState(false);
    case MenuActions.Open:
      return this.updateMenuState(true);
  }
}

MultiselectButtons.prototype.onInputBlur = function() {
  if (this.ignoreBlur) {
    this.ignoreBlur = false;
    return;
  }

  if (this.open) {
    this.updateMenuState(false, false);
  }
}

MultiselectButtons.prototype.onOptionChange = function(index) {
  this.activeIndex = index;
  this.inputEl.setAttribute('aria-activedescendant', `${this.idBase}-${index}`);

  // update active style
  const options = this.el.querySelectorAll('[role=option]');
  [...options].forEach((optionEl) => {
    optionEl.classList.remove('option-current');
  });
  options[index].classList.add('option-current');

  if (this.open && isScrollable(this.listboxEl)) {
    maintainScrollVisibility(options[index], this.listboxEl);
  }
}

MultiselectButtons.prototype.onOptionClick = function(index) {
  this.onOptionChange(index);
  this.updateOption(index);
  this.inputEl.focus();
}

MultiselectButtons.prototype.onOptionMouseDown = function() {
  this.ignoreBlur = true;
}

MultiselectButtons.prototype.removeOption = function(index) {
  const option = this.options[index];

  // update aria-selected
  const options = this.el.querySelectorAll('[role=option]');
  options[index].setAttribute('aria-selected', 'false');
  options[index].classList.remove('option-selected');

  // remove button
  const buttonEl = document.getElementById(`${this.idBase}-remove-${index}`);
  this.selectedEl.removeChild(buttonEl.parentElement);
}

MultiselectButtons.prototype.selectOption = function(index) {
  const selected = this.options[index];
  this.activeIndex = index;

  // update aria-selected
  const options = this.el.querySelectorAll('[role=option]');
  options[index].setAttribute('aria-selected', 'true');
  options[index].classList.add('option-selected');

  // add remove option button
  const buttonEl = document.createElement('button');
  const listItem = document.createElement('li');
  buttonEl.className = 'remove-option';
  buttonEl.type = 'button';
  buttonEl.id = `${this.idBase}-remove-${index}`;
  buttonEl.setAttribute('aria-describedby', `${this.idBase}-remove`);
  buttonEl.addEventListener('click', () => { this.removeOption(index); });
  buttonEl.innerHTML = selected + ' ';

  listItem.appendChild(buttonEl);
  this.selectedEl.appendChild(listItem);
}

MultiselectButtons.prototype.updateOption = function(index) {
  const option = this.options[index];
  const optionEls = this.el.querySelectorAll('[role=option]');
  const optionEl = optionEls[index];
  const isSelected = optionEl.getAttribute('aria-selected') === 'true';

  if (isSelected) {
    this.removeOption(index);
  }

  else {
    this.selectOption(index);
  }

  this.inputEl.value = '';
  this.filterOptions('');
}

MultiselectButtons.prototype.updateMenuState = function(open, callFocus = true) {
  this.open = open;

  this.comboEl.setAttribute('aria-expanded', `${open}`);
  open ? this.el.classList.add('open') : this.el.classList.remove('open');
  callFocus && this.inputEl.focus();
}

// init multiselect w/ top buttons
const multiButtonEl = document.querySelector('.js-multi-buttons');
const multiButtonComponent = new MultiselectButtons(multiButtonEl, options);
multiButtonComponent.init();

// init multiselect w/ inline buttons
const inlineButtonEl = document.querySelector('.js-inline-buttons');
const inlineButtonComponent = new MultiselectButtons(inlineButtonEl, options);
inlineButtonComponent.init();

            
          
!
999px

Console