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bootstrap.native.mjs
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/*!
* Native JavaScript for Bootstrap v3.0.0 (https://thednp.github.io/bootstrap.native/)
* Copyright 2015-2020 © dnp_theme
* Licensed under MIT (https://github.com/thednp/bootstrap.native/blob/master/LICENSE)
*/
const BSN = {},
supports = [],
DC = document,
WD = window,
DCEl = DC.Element,
isUndefined = arg => {
return arg === void 0
},
isElement = obj => {
try {
return (obj.constructor.__proto__.prototype.constructor.name) ? true : false
} catch(_) {
return false
}
},
addClass = (element, classNAME) => {
let list = classNAME.trim().split(' ')
list.forEach(item => {
element.classList.add(item)
})
},
removeClass = (element, classNAME) => {
let list = classNAME.trim().split(' ')
list.forEach(item => {
element.classList.remove(item)
})
},
hasClass = (element, classNAME) => {
return element.classList.contains(classNAME)
},
// event names
touchEvents = {
start: 'touchstart',
end: 'touchend',
move: 'touchmove',
cancel: 'touchcancel'
},
mouseHover = ('onmouseleave' in document) ? ['mouseenter', 'mouseleave'] : ['mouseover', 'mouseout'], // attach | detach handlers
on = (element, event, handler, options) => {
options = options || false
element.addEventListener(event, handler, options)
},
off = (element, event, handler, options) => {
options = options || false;
element.removeEventListener(event, handler, options)
},
one = (element, event, handler, options) => {
on(element, event, function handlerWrapper(e) {
if ( e.target === element ) {
handler(e)
off(element, event, handlerWrapper, options)
}
}, options)
}, // custom events
CE = (eventName, componentName, related) => {
let OriginalCustomEvent = new CustomEvent(eventName + '.bs.' + componentName, {
cancelable: true
})
OriginalCustomEvent.relatedTarget = related
return OriginalCustomEvent
},
dispatchCustomEvent = function(customEvent) {
this.dispatchEvent(customEvent)
}, // determine support for passive events
// determine support for passive events
supportPassive = (() => {
// Test via a getter in the options object to see if the passive property is accessed
let result = false
try {
let opts = Object.defineProperty({}, 'passive', {
get: function() {
result = true
}
})
one(WD, 'testPassive', null, opts)
off(WD, 'testPassive', null, opts)
} catch (e) {}
return result
})(),
// event options
// https://github.com/WICG/EventListenerOptions/blob/gh-pages/explainer.md#feature-detection
passiveHandler = supportPassive ? { passive: true } : false,
getCN = (element, classNAME) => {
// returns Array
return [].slice.call(element.getElementsByClassName(classNAME))
},
queryElement = (selector, parent) => {
let lookUp = parent ? parent : DC
return selector instanceof Element ? selector : lookUp.querySelector(selector)
},
supportTransitions = 'webkitTransition' in DC.body.style || 'transition' in DC.body.style,
transitionEndEvent = 'webkitTransition' in DC.body.style ? 'webkitTransitionEnd' : 'transitionend',
transitionDuration = 'webkitTransition' in DC.body.style ? 'webkitTransitionDuration' : 'transitionDuration',
getTransitionDurationFromElement = element => {
let duration = supportTransitions ? WD.getComputedStyle(element)[transitionDuration] : 0
duration = parseFloat(duration)
duration = typeof duration === 'number' && !isNaN(duration) ? duration * 1000 : 0
return duration // we take a short offset to make sure we fire on the next frame after animation
},
emulateTransitionEnd = (element, handler) => {
// emulateTransitionEnd since 2.0.4
let called = 0,
duration = getTransitionDurationFromElement(element)
duration ? one(element, transitionEndEvent, function(e) {
!called && handler(e), called = 1
}) : setTimeout(function() {
!called && handler(), called = 1
}, 17)
}
/* Native JavaScript for Bootstrap 4 | Alert
-------------------------------------------- */
function Alert(element) {
element = queryElement(element) // initialization element
element.Alert && element.Alert.dispose() // reset on re-init
/* CONSTANTS */
let self = this,
closeCustomEvent = CE('close', 'alert'),
closedCustomEvent = CE('closed', 'alert'),
triggerHandler = function triggerHandler() {
hasClass(alert, 'fade') ? emulateTransitionEnd(alert, transitionEndHandler) : transitionEndHandler()
},
clickHandler = function clickHandler(e) {
alert = e.target.closest(".alert")
element = queryElement("[data-dismiss=\"alert\"]", alert)
element && alert && (element === e.target || element.contains(e.target)) && self.close()
},
transitionEndHandler = function transitionEndHandler() {
off(element, 'click', clickHandler) // detach it's listener
alert.parentNode.removeChild(alert)
dispatchCustomEvent.call(alert, closedCustomEvent)
}
/* PUBLIC METHODS
-----------------*/
self.close = () => {
if ( alert && element && hasClass(alert, 'show') ) {
dispatchCustomEvent.call(alert, closeCustomEvent)
if ( closeCustomEvent.defaultPrevented ) {
return
}
self.dispose()
}
}
self.dispose = () => {
alert && (removeClass(alert, 'show'), triggerHandler())
off(element, 'click', clickHandler)
delete element.Alert
}
/* INIT
* prevent adding event handlers twice */
if ( !element.Alert ) {
//
on(element, 'click', clickHandler)
}
/* find the parent alert */
let alert = element.closest(".alert")
/* store init object within target element */
self.element = element
element.Alert = self
}
/* Native JavaScript for Bootstrap 4 | Button
---------------------------------------------*/
function Button(element) {
// initialization element
element = queryElement(element) // reset on re-init
element.Button && element.Button.dispose() // constant
let toggled = false, // toggled makes sure to prevent triggering twice the change.bs.button events
// bind
self = this,
// changeEvent
changeCustomEvent = CE('change', 'button'),
// private methods
keyHandler = function keyHandler(e) {
let key = e.which || e.keyCode
key === 32 && e.target === DC.activeElement && toggle(e)
},
preventScroll = function preventScroll(e) {
let key = e.which || e.keyCode
key === 32 && e.preventDefault()
},
toggle = function toggle(e) {
let label = e.target.tagName === 'LABEL' ? e.target : e.target.parentNode.tagName === 'LABEL' ? e.target.parentNode : null // the .btn label
if ( !label ) {
return //react if a label or its immediate child is clicked
}
// all the button group buttons
let labels = getCN(label.parentNode, 'btn'),
input = label.getElementsByTagName('INPUT')[0]
if ( !input ) {
return // return if no input found
}
dispatchCustomEvent.call(input, changeCustomEvent) // trigger the change for the input
dispatchCustomEvent.call(element, changeCustomEvent) // trigger the change for the btn-group
// manage the dom manipulation
if ( input.type === 'checkbox' ) {
//checkboxes
if ( changeCustomEvent.defaultPrevented ) {
return // discontinue when defaultPrevented is true
}
if ( !input.checked ) {
addClass(label, 'active')
input.getAttribute('checked')
input.setAttribute('checked', 'checked')
input.checked = true
} else {
removeClass(label, 'active')
input.getAttribute('checked')
input.removeAttribute('checked')
input.checked = false
}
if ( !toggled ) {
// prevent triggering the event twice
toggled = true;
}
}
if ( input.type === 'radio' && !toggled ) {
// radio buttons
if ( changeCustomEvent.defaultPrevented ) {
return // don't trigger if already active (the OR condition is a hack to check if the buttons were selected with key press and NOT mouse click)
}
if ( !input.checked || e.screenX === 0 && e.screenY == 0 ) {
addClass(label, 'active')
addClass(label, 'focus')
input.setAttribute('checked', 'checked')
input.checked = true
toggled = true
for (let i = 0, ll = labels.length; i < ll; i++) {
let otherLabel = labels[i],
otherInput = otherLabel.getElementsByTagName('INPUT')[0]
if ( otherLabel !== label && hasClass(otherLabel, 'active') ) {
dispatchCustomEvent.call(otherInput, changeCustomEvent) // trigger the change
removeClass(otherLabel, 'active')
otherInput.removeAttribute('checked')
otherInput.checked = false
}
}
}
}
setTimeout(() => {
toggled = false
}, 50)
},
focusHandler = function focusHandler(e) {
addClass(e.target.parentNode, 'focus')
},
blurHandler = function blurHandler(e) {
removeClass(e.target.parentNode, 'focus')
},
toggleEvents = function toggleEvents(action) {
action(element, 'click', toggle)
action(element, 'keyup', keyHandler), action(element, 'keydown', preventScroll)
let allBtns = getCN(element, 'btn')
for (let i = 0; i < allBtns.length; i++) {
let input = allBtns[i].getElementsByTagName('INPUT')[0]
action(input, 'focus', focusHandler), action(input, 'blur', blurHandler)
}
}; // public method
self.dispose = function() {
toggleEvents(off);
delete element.Button
}; // init
if ( !element.Button ) {
// prevent adding event handlers twice
toggleEvents(on);
} // activate items on load
let labelsToACtivate = getCN(element, 'btn'),
lbll = labelsToACtivate.length
for (let i = 0; i < lbll; i++) {
!hasClass(labelsToACtivate[i], 'active') && queryElement('input:checked', labelsToACtivate[i]) && addClass(labelsToACtivate[i], 'active')
} // associate target with init object
self.element = element
element.Button = self
}
/* Native JavaScript for Bootstrap 4 | Carousel
----------------------------------------------*/
// ===================
function Carousel(element, options = {}) {
// initialization element
element = queryElement(element) // reset on re-init
element.Carousel && element.Carousel.dispose() // set options
let self = this,
// DATA API
intervalAttribute = element.getAttribute('data-interval'),
intervalOption = options.interval,
intervalData = intervalAttribute === 'false' ? 0 : parseInt(intervalAttribute),
pauseData = element.getAttribute('data-pause') === 'hover' || false,
keyboardData = element.getAttribute('data-keyboard') === 'true' || false,
// carousel elements
slides = getCN(element, 'carousel-item'),
total = slides.length,
leftArrow = getCN(element, "carousel-control-prev")[0],
rightArrow = getCN(element, "carousel-control-next")[0],
indicator = queryElement(".carousel-indicators", element),
indicators = indicator && indicator.getElementsByTagName("LI") || [] // invalidate when not enough items
if ( total < 2 ) {
return;
} // set instance options
self.options = {}
self.options.keyboard = options.keyboard === true || keyboardData
self.options.pause = options.pause === 'hover' || pauseData ? 'hover' : false // false / hover
// bootstrap carousel default interval
self.options.interval = typeof intervalOption === 'number' ? intervalOption : intervalOption === false || intervalData === 0 || intervalData === false ? 0 : isNaN(intervalData) ? 5000 : intervalData // lets, index, timer
let index = element.index = 0,
timer = element.timer = 0,
isSliding = false,
// isSliding prevents click event handlers when animation is running
// touch and event coordinates
isTouch = false,
startXPosition = null,
currentXPosition = null,
endXPosition = null,
slideDirection = self.direction = 'left',
// custom events
slideCustomEvent,
slidCustomEvent, // handlers
pauseHandler = function pauseHandler() {
if ( self.options.interval !== false && !hasClass(element, 'paused') ) {
addClass(element, 'paused')
!isSliding && (clearInterval(timer), timer = null)
}
},
resumeHandler = function resumeHandler() {
if ( self.options.interval !== false && hasClass(element, 'paused') ) {
removeClass(element, 'paused')
!isSliding && (clearInterval(timer), timer = null)
!isSliding && self.cycle()
}
},
indicatorHandler = function indicatorHandler(e) {
e.preventDefault();
if ( isSliding ) {
return
}
let eventTarget = e.target // event target | the current active item
if ( eventTarget && !hasClass(eventTarget, 'active') && eventTarget.getAttribute('data-slide-to') ) {
index = parseInt(eventTarget.getAttribute('data-slide-to'), 10)
} else {
return false
}
self.slideTo(index) //Do the slide
},
controlsHandler = function controlsHandler(e) {
e.preventDefault()
if ( isSliding ) {
return
}
let eventTarget = e.currentTarget || e.srcElement
if ( eventTarget === rightArrow ) {
index++
} else if ( eventTarget === leftArrow ) {
index--
}
self.slideTo(index) //Do the slide
},
keyHandler = function keyHandler(_ref) {
let which = _ref.which
if ( isSliding ) {
return
}
switch (which) {
case 39:
index++
break;
case 37:
index--
break;
default:
return;
}
self.slideTo(index) //Do the slide
},
toggleEvents = function toggleEvents(action) {
if ( self.options.pause && self.options.interval ) {
action(element, mouseHover[0], pauseHandler)
action(element, mouseHover[1], resumeHandler)
action(element, touchEvents.start, pauseHandler, passiveHandler)
action(element, touchEvents.end, resumeHandler, passiveHandler)
}
slides.length > 1 && action(element, touchEvents.start, touchDownHandler, passiveHandler)
rightArrow && action(rightArrow, 'click', controlsHandler)
leftArrow && action(leftArrow, 'click', controlsHandler)
indicator && action(indicator, 'click', indicatorHandler)
self.options.keyboard && action(WD, 'keydown', keyHandler)
},
// touch events
toggleTouchEvents = function toggleTouchEvents(action) {
action(element, touchEvents.move, touchMoveHandler, passiveHandler)
action(element, touchEvents.end, touchEndHandler, passiveHandler)
},
touchDownHandler = function touchDownHandler(e) {
if ( isTouch ) {
return
}
startXPosition = parseInt(e.touches[0].pageX)
if ( element.contains(e.target) ) {
isTouch = true
toggleTouchEvents(on)
}
},
touchMoveHandler = function touchMoveHandler(e) {
if ( !isTouch ) {
e.preventDefault()
return
}
currentXPosition = parseInt(e.touches[0].pageX) //cancel touch if more than one touches detected
if ( e.type === 'touchmove' && e.touches.length > 1 ) {
e.preventDefault()
return false
}
},
touchEndHandler = function touchEndHandler(e) {
if ( !isTouch || isSliding ) {
return
}
endXPosition = currentXPosition || parseInt(e.touches[0].pageX)
if ( isTouch ) {
if ( (!element.contains(e.target) || !element.contains(e.relatedTarget)) && Math.abs(startXPosition - endXPosition) < 75 ) {
return false
} else {
if ( currentXPosition < startXPosition ) {
index++
} else if ( currentXPosition > startXPosition ) {
index--
}
isTouch = false
self.slideTo(index)
}
toggleTouchEvents(off)
}
},
// private methods
isElementInScrollRange = function isElementInScrollRange() {
let rect = element.getBoundingClientRect(),
viewportHeight = WD.innerHeight || DCEl.clientHeight
return rect.top <= viewportHeight && rect.bottom >= 0 // bottom && top
},
setActivePage = function setActivePage(pageIndex) {
//indicators
for (let i = 0, icl = indicators.length; i < icl; i++) {
removeClass(indicators[i], 'active');
}
if ( indicators[pageIndex] ) {
addClass(indicators[pageIndex], 'active')
}
}
// public methods
self.cycle = function () {
if ( timer ) {
clearInterval(timer)
timer = null
}
timer = setInterval(() => {
isElementInScrollRange() && (index++, self.slideTo(index))
}, self.options.interval)
}
self.slideTo = function (next) {
if ( isSliding ) {
return // when controled via methods, make sure to check again
}
// the current active and orientation
let activeItem = self.getActiveIndex(),
orientation // first return if we're on the same item #227
if ( activeItem === next ) {
return // or determine slideDirection
} else if ( activeItem < next || activeItem === 0 && next === total - 1 ) {
slideDirection = self.direction = 'left' // next
} else if ( activeItem > next || activeItem === total - 1 && next === 0 ) {
slideDirection = self.direction = 'right' // prev
} // find the right next index
if ( next < 0 ) {
next = total - 1;
} else if ( next >= total ) {
next = 0;
} // update index
index = next;
orientation = slideDirection === 'left' ? 'next' : 'prev'; // determine type
slideCustomEvent = CE('slide', 'carousel', slides[next]);
slidCustomEvent = CE('slid', 'carousel', slides[next]);
dispatchCustomEvent.call(element, slideCustomEvent); // here we go with the slide
if (slideCustomEvent.defaultPrevented) return; // discontinue when prevented
isSliding = true;
clearInterval(timer);
timer = null;
setActivePage(next);
if (supportTransitions && hasClass(element, 'slide')) {
addClass(slides[next], "carousel-item-".concat(orientation));
slides[next].offsetWidth;
addClass(slides[next], "carousel-item-".concat(slideDirection));
addClass(slides[activeItem], "carousel-item-".concat(slideDirection));
emulateTransitionEnd(slides[next], function (e) {
let timeout = e && e.target !== slides[next] ? e.elapsedTime * 1000 + 100 : 20;
isSliding && setTimeout(function () {
isSliding = false;
addClass(slides[next], 'active');
removeClass(slides[activeItem], 'active');
removeClass(slides[next], "carousel-item-".concat(orientation));
removeClass(slides[next], "carousel-item-".concat(slideDirection));
removeClass(slides[activeItem], "carousel-item-".concat(slideDirection));
dispatchCustomEvent.call(element, slidCustomEvent);
if (!DC.hidden && self.options.interval && !hasClass(element, 'paused')) {
self.cycle();
}
}, timeout);
});
} else {
addClass(slides[next], 'active');
slides[next].offsetWidth;
removeClass(slides[activeItem], 'active');
setTimeout(function () {
isSliding = false;
if (self.options.interval && !hasClass(element, 'paused')) {
self.cycle();
}
dispatchCustomEvent.call(element, slidCustomEvent);
}, 100);
}
};
self.getActiveIndex = function() {
return slides.indexOf(getCN(element, 'carousel-item active')[0]) || 0
}
self.dispose = function() {
toggleEvents(off)
clearInterval(timer)
delete element.Carousel
} // init
if ( !element.Carousel ) {
// prevent adding event handlers twice
toggleEvents(on)
} // set first slide active if none
if ( self.getActiveIndex() < 0 ) {
slides.length && addClass(slides[0], 'active')
indicators.length && setActivePage(0)
} // start to cycle if set
if ( self.options.interval ) {
self.cycle()
} // associate init object to target
self.element = element
element.Carousel = self
}
/* Native JavaScript for Bootstrap 4 | Collapse
-----------------------------------------------*/
// ===================
function Collapse(element, options) {
// initialization element
element = queryElement(element); // reset on re-init
element.Collapse && element.Collapse.dispose(); // set options
options = options || {}; // target practice
let accordion = null,
collapse = null,
activeCollapse,
activeElement; // bind, event targets and constants
let self = this,
// DATA API
accordionData = element.getAttribute('data-parent'),
// custom events
showCustomEvent = CE('show', 'collapse'),
shownCustomEvent = CE('shown', 'collapse'),
hideCustomEvent = CE('hide', 'collapse'),
hiddenCustomEvent = CE('hidden', 'collapse'),
// private methods
openAction = function openAction(collapseElement, toggle) {
dispatchCustomEvent.call(collapseElement, showCustomEvent);
if (showCustomEvent.defaultPrevented) return;
collapseElement.isAnimating = true;
addClass(collapseElement, 'collapsing');
removeClass(collapseElement, 'collapse');
collapseElement.style.height = "".concat(collapseElement.scrollHeight, "px");
emulateTransitionEnd(collapseElement, function () {
collapseElement.isAnimating = false;
collapseElement.setAttribute('aria-expanded', 'true');
toggle.setAttribute('aria-expanded', 'true');
removeClass(collapseElement, 'collapsing');
addClass(collapseElement, 'collapse');
addClass(collapseElement, 'show');
collapseElement.style.height = '';
dispatchCustomEvent.call(collapseElement, shownCustomEvent);
});
},
closeAction = function closeAction(collapseElement, toggle) {
dispatchCustomEvent.call(collapseElement, hideCustomEvent);
if (hideCustomEvent.defaultPrevented) return;
collapseElement.isAnimating = true;
collapseElement.style.height = "".concat(collapseElement.scrollHeight, "px"); // set height first
removeClass(collapseElement, 'collapse');
removeClass(collapseElement, 'show');
addClass(collapseElement, 'collapsing');
collapseElement.offsetWidth; // force reflow to enable transition
collapseElement.style.height = '0px';
emulateTransitionEnd(collapseElement, function () {
collapseElement.isAnimating = false;
collapseElement.setAttribute('aria-expanded', 'false');
toggle.setAttribute('aria-expanded', 'false');
removeClass(collapseElement, 'collapsing');
addClass(collapseElement, 'collapse');
collapseElement.style.height = '';
dispatchCustomEvent.call(collapseElement, hiddenCustomEvent);
});
},
getTarget = function getTarget() {
let href = element.href && element.getAttribute('href'),
parent = element.getAttribute('data-target'),
id = href || parent && parent.charAt(0) === '#' && parent;
return id && queryElement(id);
}; // public methods
self.toggle = function (e) {
e.preventDefault();
if (!hasClass(collapse, 'show')) {
self.show();
} else {
self.hide();
}
};
self.hide = function () {
if (collapse.isAnimating) return;
closeAction(collapse, element);
addClass(element, 'collapsed');
};
self.show = function () {
if (accordion) {
activeCollapse = queryElement(".collapse.show", accordion);
activeElement = activeCollapse && (queryElement("[data-target=\"#".concat(activeCollapse.id, "\"]"), accordion) || queryElement("[href=\"#".concat(activeCollapse.id, "\"]"), accordion));
}
if (!collapse.isAnimating || activeCollapse && !activeCollapse.isAnimating) {
if (activeElement && activeCollapse !== collapse) {
closeAction(activeCollapse, activeElement);
addClass(activeElement, 'collapsed');
}
openAction(collapse, element);
removeClass(element, 'collapsed');
}
};
self.dispose = function () {
off(element, 'click', self.toggle);
delete element.Collapse;
}; // init
// prevent adding event handlers twice
if (!element.Collapse) {
on(element, 'click', self.toggle);
} // determine targets
collapse = getTarget();
collapse.isAnimating = false;
accordion = queryElement(options.parent) || accordionData && element.closest(accordionData); // associations
collapse && (self.collapse = collapse);
accordion && (self.options = {}, self.options.parent = accordion); // associate target to init object
self.element = element;
element.Collapse = self;
}
function setFocus(element) {
element.focus ? element.focus() : element.setActive();
}
function getScroll() {
// also Affix and ScrollSpy uses it
return {
y: WD.pageYOffset || DCEl.scrollTop,
x: WD.pageXOffset || DCEl.scrollLeft
};
}
let tipPositions = /\b(top|bottom|left|right)+/;
function styleTip(link, element, position, parent) {
// both popovers and tooltips (target,tooltip,placement,elementToAppendTo)
let elementDimensions = {
w: element.offsetWidth,
h: element.offsetHeight
},
windowWidth = DCEl.clientWidth || DC.body.clientWidth,
windowHeight = DCEl.clientHeight || DC.body.clientHeight,
rect = link.getBoundingClientRect(),
scroll = parent === DC.body ? getScroll() : {
x: parent.offsetLeft + parent.scrollLeft,
y: parent.offsetTop + parent.scrollTop
},
linkDimensions = {
w: rect.right - rect.left,
h: rect.bottom - rect.top
},
isPopover = hasClass(element, 'popover'),
arrow = queryElement('.arrow', element),
halfTopExceed = rect.top + linkDimensions.h / 2 - elementDimensions.h / 2 < 0,
halfLeftExceed = rect.left + linkDimensions.w / 2 - elementDimensions.w / 2 < 0,
halfRightExceed = rect.left + elementDimensions.w / 2 + linkDimensions.w / 2 >= windowWidth,
halfBottomExceed = rect.top + elementDimensions.h / 2 + linkDimensions.h / 2 >= windowHeight,
topExceed = rect.top - elementDimensions.h < 0,
leftExceed = rect.left - elementDimensions.w < 0,
bottomExceed = rect.top + elementDimensions.h + linkDimensions.h >= windowHeight,
rightExceed = rect.left + elementDimensions.w + linkDimensions.w >= windowWidth; // recompute position
position = (position === 'left' || position === 'right') && leftExceed && rightExceed ? 'top' : position; // first, when both left and right limits are exceeded, we fall back to top|bottom
position = position === 'top' && topExceed ? 'bottom' : position;
position = position === 'bottom' && bottomExceed ? 'top' : position;
position = position === 'left' && leftExceed ? 'right' : position;
position = position === 'right' && rightExceed ? 'left' : position;
let topPosition, leftPosition, arrowTop, arrowLeft, arrowWidth, arrowHeight; // update tooltip/popover class
element.className.indexOf(position) === -1 && (element.className = element.className.replace(tipPositions, position)); // we check the computed width & height and update here
arrowWidth = arrow.offsetWidth;
arrowHeight = arrow.offsetHeight; // apply styling to tooltip or popover
if (position === 'left' || position === 'right') {
// secondary|side positions
if (position === 'left') {
// LEFT
leftPosition = rect.left + scroll.x - elementDimensions.w - (isPopover ? arrowWidth : 0);
} else {
// RIGHT
leftPosition = rect.left + scroll.x + linkDimensions.w;
} // adjust top and arrow
if (halfTopExceed) {
topPosition = rect.top + scroll.y;
arrowTop = linkDimensions.h / 2 - arrowWidth;
} else if (halfBottomExceed) {
topPosition = rect.top + scroll.y - elementDimensions.h + linkDimensions.h;
arrowTop = elementDimensions.h - linkDimensions.h / 2 - arrowWidth;
} else {
topPosition = rect.top + scroll.y - elementDimensions.h / 2 + linkDimensions.h / 2;
arrowTop = elementDimensions.h / 2 - (isPopover ? arrowHeight * 0.9 : arrowHeight / 2);
}
} else if (position === 'top' || position === 'bottom') {
// primary|vertical positions
if (position === 'top') {
// TOP
topPosition = rect.top + scroll.y - elementDimensions.h - (isPopover ? arrowHeight : 0);
} else {
// BOTTOM
topPosition = rect.top + scroll.y + linkDimensions.h;
} // adjust left | right and also the arrow
if (halfLeftExceed) {
leftPosition = 0;
arrowLeft = rect.left + linkDimensions.w / 2 - arrowWidth;
} else if (halfRightExceed) {
leftPosition = windowWidth - elementDimensions.w * 1.01;
arrowLeft = elementDimensions.w - (windowWidth - rect.left) + linkDimensions.w / 2 - arrowWidth / 2;
} else {
leftPosition = rect.left + scroll.x - elementDimensions.w / 2 + linkDimensions.w / 2;
arrowLeft = elementDimensions.w / 2 - (isPopover ? arrowWidth : arrowWidth / 2);
}
} // apply style to tooltip/popover and its arrow
element.style.top = topPosition + 'px';
element.style.left = leftPosition + 'px';
arrowTop && (arrow.style.top = arrowTop + 'px');
arrowLeft && (arrow.style.left = arrowLeft + 'px');
}
/* Native JavaScript for Bootstrap 4 | Dropdown
----------------------------------------------*/
// ===================
function Dropdown(element, option) {
// initialization element
element = queryElement(element); // reset on re-init
element.Dropdown && element.Dropdown.dispose(); // custom events
let showCustomEvent,
shownCustomEvent,
hideCustomEvent,
hiddenCustomEvent,
relatedTarget = null; // constants
let self = this,
// targets
parent = element.parentNode,
menu = queryElement('.dropdown-menu', parent),
menuItems = function () {
let set = menu.children,
newSet = [];
for (let i = 0; i < set.length; i++) {
set[i].children.length && set[i].children[0].tagName === 'A' && newSet.push(set[i].children[0]);
set[i].tagName === 'A' && newSet.push(set[i]);
}
return newSet;
}(),
// preventDefault on empty anchor links
preventEmptyAnchor = function preventEmptyAnchor(anchor) {
(anchor.href && anchor.href.slice(-1) === '#' || anchor.parentNode && anchor.parentNode.href && anchor.parentNode.href.slice(-1) === '#') && this.preventDefault();
},
// toggle dismissible events
toggleDismiss = function toggleDismiss() {
let action = element.open ? on : off;
action(DC, 'click', dismissHandler);
action(DC, 'keydown', preventScroll);
action(DC, 'keyup', keyHandler);
action(DC, 'focus', dismissHandler, true);
},
// handlers
dismissHandler = function dismissHandler(e) {
let eventTarget = e.target,
hasData = eventTarget && (eventTarget.getAttribute('data-toggle') || eventTarget.parentNode && eventTarget.parentNode.getAttribute && eventTarget.parentNode.getAttribute('data-toggle'));
if (e.type === 'focus' && (eventTarget === element || eventTarget === menu || menu.contains(eventTarget))) {
return;
}
if ((eventTarget === menu || menu.contains(eventTarget)) && (self.options.persist || hasData)) {
return;
} else {
relatedTarget = eventTarget === element || element.contains(eventTarget) ? element : null;
hide();
}
preventEmptyAnchor.call(e, eventTarget);
},
clickHandler = function clickHandler(e) {
relatedTarget = element;
show();
preventEmptyAnchor.call(e, e.target);
},
preventScroll = function preventScroll(e) {
let key = e.which || e.keyCode;
if (key === 38 || key === 40) {
e.preventDefault();
}
},
keyHandler = function keyHandler(_ref) {
let which = _ref.which,
keyCode = _ref.keyCode;
let key = which || keyCode,
activeItem = DC.activeElement,
isSameElement = activeItem === element,
isInsideMenu = menu.contains(activeItem),
isMenuItem = activeItem.parentNode === menu || activeItem.parentNode.parentNode === menu;
let idx = menuItems.indexOf(activeItem);
if (isMenuItem) {
// navigate up | down
idx = isSameElement ? 0 : key === 38 ? idx > 1 ? idx - 1 : 0 : key === 40 ? idx < menuItems.length - 1 ? idx + 1 : idx : idx;
menuItems[idx] && setFocus(menuItems[idx]);
}
if ((menuItems.length && isMenuItem // menu has items
|| !menuItems.length && (isInsideMenu || isSameElement) // menu might be a form
|| !isInsideMenu) && // or the focused element is not in the menu at all
element.open && key === 27 // menu must be open
) {
self.toggle();
relatedTarget = null;
}
},
// private methods
show = function show() {
showCustomEvent = CE('show', 'dropdown', relatedTarget);
dispatchCustomEvent.call(parent, showCustomEvent);
if (showCustomEvent.defaultPrevented) return;
addClass(menu, 'show');
addClass(parent, 'show');
element.setAttribute('aria-expanded', true);
element.open = true;
off(element, 'click', clickHandler);
setTimeout(function () {
setFocus(menu.getElementsByTagName('INPUT')[0] || element); // focus the first input item | element
toggleDismiss();
shownCustomEvent = CE('shown', 'dropdown', relatedTarget);
dispatchCustomEvent.call(parent, shownCustomEvent);
}, 1);
},
hide = function hide() {
hideCustomEvent = CE('hide', 'dropdown', relatedTarget);
dispatchCustomEvent.call(parent, hideCustomEvent);
if (hideCustomEvent.defaultPrevented) return;
removeClass(menu, 'show');
removeClass(parent, 'show');
element.setAttribute('aria-expanded', false);