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How to use allSelectedItemElements method in Best

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MultiSelectAutocomplete.jsx

Source:MultiSelectAutocomplete.jsx

1/* eslint-disable jsx-a11y/interactive-supports-focus, jsx-a11y/role-has-required-aria-props */2// Disabled due to the linter being out of date for combobox role: https://github.com/jsx-eslint/eslint-plugin-jsx-a11y/issues/7893import { h, Fragment } from 'preact';4import { useEffect, useRef, useReducer } from 'preact/hooks';5import { Icon, Button } from '@crayons';6import { Close } from '@images/x.svg';7const KEYS = {8  UP: 'ArrowUp',9  DOWN: 'ArrowDown',10  ENTER: 'Enter',11  ESCAPE: 'Escape',12  DELETE: 'Backspace',13  COMMA: ',',14  SPACE: ' ',15};16const ALLOWED_CHARS_REGEX = /([a-zA-Z0-9])/;17const reducer = (state, action) => {18  switch (action.type) {19    case 'setSelectedItems':20      return {21        ...state,22        selectedItems: action.payload,23        suggestions: [],24        activeDescendentIndex: null,25      };26    case 'setSuggestions':27      return {28        ...state,29        suggestions: action.payload,30        activeDescendentIndex: null,31      };32    case 'updateEditState':33      return {34        ...state,35        editValue: action.payload.editValue,36        inputPosition: action.payload.inputPosition,37      };38    case 'setActiveDescendentIndex':39      return { ...state, activeDescendentIndex: action.payload };40    case 'setIgnoreBlur':41      return { ...state, ignoreBlur: action.payload };42    default:43      return state;44  }45};46export const MultiSelectAutocomplete = ({ labelText, fetchSuggestions }) => {47  const [state, dispatch] = useReducer(reducer, {48    suggestions: [],49    selectedItems: [],50    inputPosition: null,51    editValue: '',52    activeDescendentIndex: null,53    ignoreBlur: false,54  });55  const {56    selectedItems,57    suggestions,58    inputPosition,59    editValue,60    activeDescendentIndex,61    ignoreBlur,62  } = state;63  const inputRef = useRef(null);64  const inputSizerRef = useRef(null);65  const selectedItemsRef = useRef(null);66  const handleInputBlur = () => {67    // Since the input is sometimes removed and rendered in a new location on blur, it's possible that inputRef.current may be null when we complete this check.68    const currentValue = inputRef.current ? inputRef.current.value : '';69    // The input will blur when user selects an option from the dropdown via mouse click. The ignoreBlur boolean lets us know we can ignore this event.70    if (!ignoreBlur && currentValue !== '') {71      selectItem({ selectedItem: currentValue, focusInput: false });72    } else {73      dispatch({ type: 'setSuggestions', payload: [] });74    }75    dispatch({ type: 'setIgnoreBlur', payload: false });76  };77  useEffect(() => {78    const { current: input } = inputRef;79    if (inputPosition !== null) {80      resizeInputToContentSize();81      input.value = editValue;82      const { length: cursorPosition } = editValue;83      input.focus();84      input.setSelectionRange(cursorPosition, cursorPosition);85    } else {86      // Remove inline style added to size the input87      input.style.width = '';88      input.focus();89    }90  }, [inputPosition, editValue]);91  const enterEditState = (editItem, editItemIndex) => {92    inputSizerRef.current.innerText = editItem;93    deselectItem(editItem);94    dispatch({95      type: 'updateEditState',96      payload: { editValue: editItem, inputPosition: editItemIndex },97    });98  };99  const exitEditState = (nextInputValue = '') => {100    inputSizerRef.current.innerText = nextInputValue;101    dispatch({102      type: 'updateEditState',103      payload: {104        editValue: nextInputValue,105        inputPosition: nextInputValue === '' ? null : inputPosition + 1,106      },107    });108  };109  const resizeInputToContentSize = () => {110    inputRef.current.style.width = `${inputSizerRef.current.clientWidth}px`;111  };112  const handleInputChange = async ({ target: { value } }) => {113    // When the input appears inline in "edit" mode, we need to dynamically calculate the width to ensure it occupies the right space114    // (an input cannot resize based on its text content). We use a hidden <span> to track the size.115    inputSizerRef.current.innerText = value;116    if (inputPosition !== null) {117      resizeInputToContentSize();118    }119    const results = await fetchSuggestions(value);120    dispatch({121      type: 'setSuggestions',122      payload: results.filter((item) => !selectedItems.includes(item)),123    });124  };125  const clearInput = () => {126    inputRef.current.value = '';127    dispatch({ type: 'setSuggestions', payload: [] });128  };129  const handleKeyDown = (e) => {130    const { selectionStart, value: currentValue } = inputRef.current;131    switch (e.key) {132      case KEYS.DOWN:133        e.preventDefault();134        if (135          activeDescendentIndex !== null &&136          activeDescendentIndex < suggestions.length - 1137        ) {138          dispatch({139            type: 'setActiveDescendentIndex',140            payload: activeDescendentIndex + 1,141          });142        } else {143          dispatch({ type: 'setActiveDescendentIndex', payload: 0 });144        }145        break;146      case KEYS.UP:147        e.preventDefault();148        dispatch({149          type: 'setActiveDescendentIndex',150          payload:151            activeDescendentIndex >= 1152              ? activeDescendentIndex - 1153              : suggestions.length - 1,154        });155        break;156      case KEYS.ENTER:157        e.preventDefault();158        if (activeDescendentIndex !== null) {159          selectItem({ selectedItem: suggestions[activeDescendentIndex] });160        }161        break;162      case KEYS.ESCAPE:163        e.preventDefault();164        // Clear the input and suggestions165        clearInput();166        break;167      case KEYS.COMMA:168      case KEYS.SPACE:169        e.preventDefault();170        // Accept whatever is in the input before the comma or space.171        // If any text remains after the comma or space, the edit will continue separately172        if (currentValue !== '') {173          selectItem({174            selectedItem: currentValue.slice(0, selectionStart),175            nextInputValue: currentValue.slice(selectionStart),176          });177        }178        break;179      case KEYS.DELETE:180        if (currentValue === '') {181          e.preventDefault();182          editPreviousSelectionIfExists();183        }184        break;185      default:186        if (!ALLOWED_CHARS_REGEX.test(e.key)) {187          e.preventDefault();188        }189    }190  };191  // If there is a previous selection, then pop it into edit mode192  const editPreviousSelectionIfExists = () => {193    if (selectedItems.length > 0 && inputPosition !== 0) {194      const nextEditIndex =195        inputPosition !== null ? inputPosition - 1 : selectedItems.length - 1;196      const item = selectedItems[nextEditIndex];197      deselectItem(item);198      enterEditState(item, nextEditIndex);199    }200  };201  const selectItem = ({202    selectedItem,203    nextInputValue = '',204    focusInput = true,205  }) => {206    // If a user has manually typed an item already selected, reset207    if (selectedItems.includes(selectedItem)) {208      clearInput();209      return;210    }211    // If an item was edited, we want to keep it in the same position in the list212    const insertIndex =213      inputPosition !== null ? inputPosition : selectedItems.length;214    const newSelections = [215      ...selectedItems.slice(0, insertIndex),216      selectedItem,217      ...selectedItems.slice(insertIndex),218    ];219    // We update the hidden selected items list, so additions are announced to screen reader users220    const listItem = document.createElement('li');221    listItem.innerText = selectedItem;222    selectedItemsRef.current.appendChild(listItem);223    exitEditState(nextInputValue);224    dispatch({ type: 'setSelectedItems', payload: newSelections });225    // Clear the text input226    const { current: input } = inputRef;227    input.value = nextInputValue;228    focusInput && input.focus();229  };230  const deselectItem = (deselectedItem) => {231    dispatch({232      type: 'setSelectedItems',233      payload: selectedItems.filter((item) => item !== deselectedItem),234    });235    // We also update the hidden selected items list, so removals are announced to screen reader users236    selectedItemsRef.current.querySelectorAll('li').forEach((selectionNode) => {237      if (selectionNode.innerText === deselectedItem) {238        selectionNode.remove();239      }240    });241  };242  const allSelectedItemElements = selectedItems.map((item, index) => (243    <li key={item} className="w-max">244      <div role="group" aria-label={item} className="flex mr-1 mb-1 w-max">245        <Button246          variant="secondary"247          className="c-autocomplete--multi__selected p-1 cursor-text"248          aria-label={`Edit ${item}`}249          onClick={() => enterEditState(item, index)}250        >251          {item}252        </Button>253        <Button254          variant="secondary"255          className="c-autocomplete--multi__selected p-1"256          aria-label={`Remove ${item}`}257          onClick={() => deselectItem(item)}258        >259          <Icon src={Close} />260        </Button>261      </div>262    </li>263  ));264  // When a user edits a tag, we need to move the input inside the selected items265  const splitSelectionsAt =266    inputPosition !== null ? inputPosition : selectedItems.length;267  const input = (268    <li className="self-center">269      <input270        ref={inputRef}271        autocomplete="off"272        className="c-autocomplete--multi__input"273        aria-activedescendant={274          activeDescendentIndex !== null275            ? suggestions[activeDescendentIndex]276            : null277        }278        aria-autocomplete="list"279        aria-labelledby="multi-select-label selected-items-list"280        type="text"281        onChange={handleInputChange}282        onKeyDown={handleKeyDown}283        onBlur={handleInputBlur}284      />285    </li>286  );287  return (288    <Fragment>289      <span290        ref={inputSizerRef}291        aria-hidden="true"292        className="absolute pointer-events-none opacity-0 p-2"293      />294      <label id="multi-select-label">{labelText}</label>295      {/* A visually hidden list provides confirmation messages to screen reader users as an item is selected or removed */}296      <div className="screen-reader-only">297        <p>Selected items:</p>298        <ul299          ref={selectedItemsRef}300          className="screen-reader-only list-none"301          aria-live="assertive"302          aria-atomic="false"303          aria-relevant="additions removals"304        />305      </div>306      <div className="c-autocomplete--multi relative">307        {/* disabled as the inner input forms the tab stop (this click handler ensures _any_ click on the wrapper focuses the input which may be less wide) */}308        {/* eslint-disable-next-line jsx-a11y/click-events-have-key-events */}309        <div310          role="combobox"311          aria-haspopup="listbox"312          aria-expanded={suggestions.length > 0}313          aria-owns="listbox1"314          className="c-autocomplete--multi__wrapper flex items-center crayons-textfield cursor-text"315          onClick={() => inputRef.current.focus()}316        >317          <ul id="combo-selected" className="list-none flex flex-wrap w-100">318            {allSelectedItemElements.slice(0, splitSelectionsAt)}319            {inputPosition !== null && input}320            {allSelectedItemElements.slice(splitSelectionsAt)}321            {inputPosition === null && input}322          </ul>323        </div>324        {suggestions.length > 0 ? (325          <ul326            className="c-autocomplete--multi__popover"327            aria-labelledby="multi-select-label"328            role="listbox"329            aria-multiselectable="true"330            id="listbox1"331          >332            {suggestions.map((suggestion, index) => (333              // Focus remains in the input during keyboard use, and event handler is attached to that input334              // eslint-disable-next-line jsx-a11y/click-events-have-key-events335              <li336                id={suggestion}337                role="option"338                aria-selected={index === activeDescendentIndex}339                key={suggestion}340                onClick={() => selectItem({ selectedItem: suggestion })}341                onMouseDown={() =>342                  dispatch({ type: 'setIgnoreBlue', payload: true })343                }344              >345                {suggestion}346              </li>347            ))}348          </ul>349        ) : null}350      </div>351    </Fragment>352  );...

MultiInput.jsx

Source:MultiInput.jsx

1import { h, Fragment } from 'preact';2import PropTypes from 'prop-types';3import { useRef, useState, useEffect } from 'preact/hooks';4import { DefaultSelectionTemplate } from '../../shared/components/defaultSelectionTemplate';5const KEYS = {6  ENTER: 'Enter',7  COMMA: ',',8  SPACE: ' ',9  DELETE: 'Backspace',10};11/**12 * Component allowing users to add multiple entries for a given input field that get displayed as destructive pills13 *14 * @param {Object} props15 * @param {string} props.labelText The text for the input's label16 * @param {boolean} props.showLabel Whether the label text should be visible or hidden (for assistive tech users only)17 * @param {string} props.placeholder Input placeholder text18 * @param {string} props.inputRegex Optional regular expression used to restrict the input19 * @param {string} props.validationRegex Optional regular expression used to validate the value of the input20 * @param {Function} props.SelectionTemplate Optional Preact component to render selected items21 */22export const MultiInput = ({23  placeholder,24  inputRegex,25  validationRegex,26  showLabel = true,27  labelText,28  SelectionTemplate = DefaultSelectionTemplate,29}) => {30  const inputRef = useRef(null);31  const inputSizerRef = useRef(null);32  const selectedItemsRef = useRef(null);33  const [items, setItems] = useState([]);34  const [editValue, setEditValue] = useState(null);35  const [inputPosition, setInputPosition] = useState(null);36  useEffect(() => {37    // editValue defaults to null when component is first rendered.38    // This ensures we do not autofocus the input before the user has started interacting with the component.39    if (editValue === null) {40      return;41    }42    const { current: input } = inputRef;43    if (input && inputPosition !== null) {44      // Entering 'edit' mode45      resizeInputToContentSize();46      input.value = editValue;47      const { length: cursorPosition } = editValue;48      input.focus();49      // This will set the cursor position at the end of the text.50      input.setSelectionRange(cursorPosition, cursorPosition);51    }52  }, [inputPosition, editValue]);53  const handleInputBlur = ({ target: { value } }) => {54    addItemToList(value);55    clearInput();56  };57  const handleInputChange = async ({ target: { value } }) => {58    // When the input appears inline in "edit" mode, we need to dynamically calculate the width to ensure it occupies the right space59    // (an input cannot resize based on its text content). We use a hidden <span> to track the size.60    inputSizerRef.current.innerText = value;61    if (inputPosition !== null) {62      resizeInputToContentSize();63    }64  };65  const handleKeyDown = (e) => {66    const { value: currentValue } = inputRef.current;67    switch (e.key) {68      case KEYS.SPACE:69      case KEYS.ENTER:70      case KEYS.COMMA:71        e.preventDefault();72        addItemToList(e.target.value);73        clearInput();74        break;75      case KEYS.DELETE:76        if (currentValue === '') {77          e.preventDefault();78          editPreviousSelectionIfExists();79        }80        break;81      default:82        if (inputRegex && !inputRegex.test(e.key)) {83          e.preventDefault();84        }85    }86  };87  const addItemToList = (value) => {88    if (value.trim().length > 0) {89      // If an item was edited, we want to keep it in the same position in the list90      const insertIndex = inputPosition !== null ? inputPosition : items.length;91      // if we do not pass in a validationRegex we can assume that anything is valid92      const valid = validationRegex ? checkValidity(value) : true;93      const newSelections = [94        ...items.slice(0, insertIndex),95        { value, valid },96        ...items.slice(insertIndex),97      ];98      // We update the hidden selected items list, so additions are announced to screen reader users99      const listItem = document.createElement('li');100      listItem.innerText = value;101      selectedItemsRef.current.appendChild(listItem);102      setItems([...newSelections]);103      exitEditState({});104    }105  };106  const checkValidity = (value) => {107    return validationRegex.test(value);108  };109  const clearInput = () => {110    inputRef.current.value = '';111  };112  const resizeInputToContentSize = () => {113    const { current: input } = inputRef;114    if (input) {115      input.style.width = `${inputSizerRef.current.clientWidth}px`;116    }117  };118  const deselectItem = (clickedItem) => {119    const newArr = items.filter((item) => item.value !== clickedItem);120    setItems(newArr);121    // We also update the hidden selected items list, so removals are announced to screen reader users122    selectedItemsRef.current.querySelectorAll('li').forEach((selectionNode) => {123      if (selectionNode.innerText === clickedItem) {124        selectionNode.remove();125      }126    });127  };128  // If there is a previous selection, then pop it into edit mode129  const editPreviousSelectionIfExists = () => {130    if (items.length > 0 && inputPosition !== 0) {131      const nextEditIndex =132        inputPosition !== null ? inputPosition - 1 : items.length - 1;133      const item = items[nextEditIndex];134      enterEditState(item.value, nextEditIndex);135    }136  };137  const enterEditState = (editItem, editItemIndex) => {138    inputSizerRef.current.innerText = editItem;139    deselectItem(editItem);140    setEditValue(editItem);141    setInputPosition(editItemIndex);142  };143  const exitEditState = ({ nextInputValue = '' }) => {144    // Reset 'edit mode' input resizing145    inputRef.current?.style?.removeProperty('width');146    inputSizerRef.current.innerText = nextInputValue;147    setEditValue(nextInputValue);148    setInputPosition(nextInputValue === '' ? null : inputPosition + 1);149    // Blurring away while clearing the input150    if (nextInputValue === '') {151      inputRef.current.value = '';152    }153  };154  const allSelectedItemElements = items.map((item, index) => {155    // When we are in "edit mode" we visually display the input between the other selections156    // If the item being edited appears before the item being rendered then we set its position to157    // the index + 1 which matches the order, however, any items that appear after the item that is158    // being edited will need to increment their position by one to make place for the item being edited.159    // at this point the position is already set160    const defaultPosition = index + 1;161    const appearsBeforeInput = inputPosition === null || index < inputPosition;162    const position = appearsBeforeInput ? defaultPosition : defaultPosition + 1;163    return (164      <li165        key={index}166        className="c-input--multi__selection-list-item w-max"167        style={{ order: position }}168      >169        <SelectionTemplate170          name={item.value}171          className={`c-input--multi__selected ${172            !item.valid ? 'c-input--multi__selected-invalid' : ''173          }`}174          enableValidation={true}175          valid={item.valid}176          onEdit={() => enterEditState(item.value, index)}177          onDeselect={() => deselectItem(item.value)}178        />179      </li>180    );181  });182  return (183    <Fragment>184      <span185        ref={inputSizerRef}186        aria-hidden="true"187        className="absolute pointer-events-none opacity-0 p-2"188      />189      <label190        id="multi-select-label"191        className={showLabel ? '' : 'screen-reader-only'}192      >193        {labelText}194      </label>195      {/* A visually hidden list provides confirmation messages to screen reader users as an item is selected or removed */}196      <div className="screen-reader-only">197        <p>Selected items:</p>198        <ul199          ref={selectedItemsRef}200          className="screen-reader-only list-none"201          aria-live="assertive"202          aria-atomic="false"203          aria-relevant="additions removals"204        />205      </div>206      <div class="c-input--multi relative">207        <div class="c-input--multi__wrapper-border crayons-textfield flex items-center cursor-text pb-9">208          <ul class="list-none flex flex-wrap w-100">209            {allSelectedItemElements}210            <li211              class="self-center"212              style={{213                order:214                  inputPosition === null ? items.length + 1 : inputPosition + 1,215              }}216            >217              <input218                autocomplete="off"219                class="c-input--multi__input"220                type="text"221                aria-labelledby="multi-select-label"222                onBlur={handleInputBlur}223                onKeyDown={handleKeyDown}224                placeholder={inputPosition === null ? placeholder : null}225                onChange={handleInputChange}226                ref={inputRef}227              />228            </li>229          </ul>230        </div>231      </div>232    </Fragment>233  );234};235MultiInput.propTypes = {236  labelText: PropTypes.string.isRequired,237  showLabel: PropTypes.bool,238  placeholder: PropTypes.string,239  inputRegex: PropTypes.string,240  validationRegex: PropTypes.string,241  SelectionTemplate: PropTypes.func,...

dropdown.spec.js

Source:dropdown.spec.js

1import { createElement } from 'lwc';2import Dropdown from 'component/dropdown';3describe('component-dropdown', () => {4    afterEach(() => {5        // The jsdom instance is shared across test cases in a single file so reset the DOM6        while (document.body.firstChild) {7            document.body.removeChild(document.body.firstChild);8        }9    });10    it('display correct text and data-index with one selected item', () => {11        const selectedItem = {12            title: 'First Selected Item',13            id: 'item-one',14        };15        const items = [16            selectedItem,17            {18                title: 'Second Item',19                id: 'item-two',20            },21            {22                title: 'Third Item',23                id: 'item-three',24            },25        ];26        const element = createElement('component-dropdown', { is: Dropdown });27        element.options = {28            multiple: false,29            items,30            selectedItems: [selectedItem],31        };32        document.body.appendChild(element);33        return Promise.resolve().then(() => {34            expect(element).toMatchSnapshot();35            const selectedItemElement = element.shadowRoot.querySelector('.selected-item');36            expect(selectedItemElement.textContent).toBe(selectedItem.title);37            expect(parseInt(selectedItemElement.dataset.index, 10)).toBe(0);38        });39    });40    it('displays no selected items when none are provided', () => {41        const items = [42            {43                title: 'First Selected Item',44                id: 'item-one',45            },46            {47                title: 'Second Item',48                id: 'item-two',49            },50            {51                title: 'Third Item',52                id: 'item-three',53            },54        ];55        const element = createElement('component-dropdown', { is: Dropdown });56        element.options = {57            multiple: false,58            items,59            selectedItems: [],60        };61        document.body.appendChild(element);62        return Promise.resolve().then(() => {63            expect(element).toMatchSnapshot();64            const allSelectedItemElements = element.shadowRoot.querySelectorAll('.selected-item');65            expect(allSelectedItemElements).toHaveLength(0);66        });67    });68    it('displays no items when none are provided', () => {69        const element = createElement('component-dropdown', { is: Dropdown });70        element.options = {71            multiple: false,72            items: [],73            selectedItems: [],74        };75        document.body.appendChild(element);76        return Promise.resolve().then(() => {77            expect(element).toMatchSnapshot();78            const allItemElements = element.shadowRoot.querySelectorAll('.item');79            expect(allItemElements).toHaveLength(0);80        });81    });82    it('displays items in correct order', () => {83        const items = [84            {85                title: 'First Selected Item',86                id: 'item-one',87            },88            {89                title: 'Second Item',90                id: 'item-two',91            },92            {93                title: 'Third Item',94                id: 'item-three',95            },96        ];97        const element = createElement('component-dropdown', { is: Dropdown });98        element.options = {99            multiple: false,100            items,101            selectedItems: [],102        };103        document.body.appendChild(element);104        return Promise.resolve().then(() => {105            expect(element).toMatchSnapshot();106            const allItemElements = element.shadowRoot.querySelectorAll('.item');107            expect(allItemElements).toHaveLength(items.length);108            items.forEach((item, index) => {109                const itemElement = allItemElements[index];110                expect(itemElement.textContent).toBe(item.title);111                expect(parseInt(itemElement.dataset.index, 10)).toBe(index);112            });113        });114    });115    it('fires selection event when item is clicked', () => {116        const items = [117            {118                title: 'First Selected Item',119                id: 'item-one',120            },121            {122                title: 'Second Item',123                id: 'item-two',124            },125            {126                title: 'Third Item',127                id: 'item-three',128            },129        ];130        const element = createElement('component-dropdown', { is: Dropdown });131        element.options = {132            multiple: false,133            items,134            selectedItems: [],135        };136        const evtListenerMock = jest.fn();137        element.addEventListener('selection', evtListenerMock);138        document.body.appendChild(element);139        return Promise.resolve().then(() => {140            const itemElement = element.shadowRoot.querySelector('.item');141            itemElement.click();142            expect(evtListenerMock).toHaveBeenCalledTimes(1);143        });144    });...

Using AI Code Generation

1const BestBuy = require("./BestBuy.js");2const bestBuy = new BestBuy();3const allItems = bestBuy.allSelectedItemElements();4for (let i = 0; i < allItems.length; i++) {5  console.log(allItems[i].getText());6}

Using AI Code Generation

1const BestBuy = require('./BestBuy');2const bestBuy = new BestBuy();3const allSelectedItemsElements = bestBuy.allSelectedItemElements();4allSelectedItemsElements.then(function (result) {5    console.log(result);6});

Using AI Code Generation

1const bestBuy = require('../src/bestBuy');2const assert = require('assert');3describe('allSelectedItemElements', () => {4    it('should return an array of all items selected', () => {5        const result = bestBuy.allSelectedItemElements();6        assert.strictEqual(Array.isArray(result), true);7    });8});

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