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Fix dropdown escape propagation #33479

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merged 5 commits into from Apr 1, 2021
Merged

Fix dropdown escape propagation #33479

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f307fdd
refactor: extract the menu item selection logic into its own function
alpadev Mar 25, 2021
0eaa413
test: add test case for dropdown escape key propagation
alpadev Mar 25, 2021
04022c9
fix: escape key should not be handled when the dropdown is closed
alpadev Mar 25, 2021
3f658e5
refactor: changed getButton to getToggleButton
alpadev Mar 30, 2021
8326bb5
Merge branch 'main' into fix-dropdown-escape-propagation
XhmikosR Apr 1, 2021
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63 changes: 35 additions & 28 deletions js/src/dropdown.js
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Expand Up @@ -443,6 +443,31 @@ class Dropdown extends BaseComponent {
}
}

static selectMenuItem(parent, event) {
const items = SelectorEngine.find(SELECTOR_VISIBLE_ITEMS, parent).filter(isVisible)

if (!items.length) {
return
}

let index = items.indexOf(event.target)

// Up
if (event.key === ARROW_UP_KEY && index > 0) {
index--
}

// Down
if (event.key === ARROW_DOWN_KEY && index < items.length - 1) {
index++
}

// index is -1 if the first keydown is an ArrowUp
index = index === -1 ? 0 : index

items[index].focus()
}

static getParentFromElement(element) {
return getElementFromSelector(element) || element.parentNode
}
Expand All @@ -463,26 +488,29 @@ class Dropdown extends BaseComponent {
return
}

const isActive = this.classList.contains(CLASS_NAME_SHOW)

if (!isActive && event.key === ESCAPE_KEY) {
return
}

event.preventDefault()
event.stopPropagation()

if (isDisabled(this)) {
return
}

const parent = Dropdown.getParentFromElement(this)
const isActive = this.classList.contains(CLASS_NAME_SHOW)
const getToggleButton = () => this.matches(SELECTOR_DATA_TOGGLE) ? this : SelectorEngine.prev(this, SELECTOR_DATA_TOGGLE)[0]

if (event.key === ESCAPE_KEY) {
const button = this.matches(SELECTOR_DATA_TOGGLE) ? this : SelectorEngine.prev(this, SELECTOR_DATA_TOGGLE)[0]
button.focus()
getToggleButton().focus()
Dropdown.clearMenus()
return
}

if (!isActive && (event.key === ARROW_UP_KEY || event.key === ARROW_DOWN_KEY)) {
const button = this.matches(SELECTOR_DATA_TOGGLE) ? this : SelectorEngine.prev(this, SELECTOR_DATA_TOGGLE)[0]
button.click()
getToggleButton().click()
return
}

Expand All @@ -491,28 +519,7 @@ class Dropdown extends BaseComponent {
return
}

const items = SelectorEngine.find(SELECTOR_VISIBLE_ITEMS, parent).filter(isVisible)

if (!items.length) {
return
}

let index = items.indexOf(event.target)

// Up
if (event.key === ARROW_UP_KEY && index > 0) {
index--
}

// Down
if (event.key === ARROW_DOWN_KEY && index < items.length - 1) {
index++
}

// index is -1 if the first keydown is an ArrowUp
index = index === -1 ? 0 : index

items[index].focus()
Dropdown.selectMenuItem(Dropdown.getParentFromElement(this), event)
}
}

Expand Down
33 changes: 33 additions & 0 deletions js/tests/unit/dropdown.spec.js
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Expand Up @@ -1671,6 +1671,39 @@ describe('Dropdown', () => {
done()
}, 20)
})

it('should propagate escape key events if dropdown is closed', done => {
fixtureEl.innerHTML = [
'<div class="parent">',
' <div class="dropdown">',
' <button class="btn dropdown-toggle" data-bs-toggle="dropdown">Dropdown</button>',
' <div class="dropdown-menu">',
' <a class="dropdown-item" href="#">Some Item</a>',
' </div>',
' </div>',
'</div>'
]

const parent = fixtureEl.querySelector('.parent')
const toggle = fixtureEl.querySelector('[data-bs-toggle="dropdown"]')

const parentKeyHandler = jasmine.createSpy('parentKeyHandler')

parent.addEventListener('keydown', parentKeyHandler)
parent.addEventListener('keyup', () => {
expect(parentKeyHandler).toHaveBeenCalled()
done()
})

const keydownEscape = createEvent('keydown', { bubbles: true })
keydownEscape.key = 'Escape'
const keyupEscape = createEvent('keyup', { bubbles: true })
keyupEscape.key = 'Escape'

toggle.focus()
toggle.dispatchEvent(keydownEscape)
toggle.dispatchEvent(keyupEscape)
})
})

describe('jQueryInterface', () => {
Expand Down