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vuebar.js
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vuebar.js
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/*----------------------------------------*\
Vuebar
\*----------------------------------------*/
;(function(){
'use strict';
/*------------------------------------*\
Vuebar
\*------------------------------------*/
var Vuebar = {};
Vuebar.install = function(Vue, installOptions){
/*------------------------------------*\
Custom Directive Name
\*------------------------------------*/
installOptions = installOptions || {};
installOptions.directive = installOptions.directive || 'bar';
/*------------------------------------*\
Create State
- contains default values
\*------------------------------------*/
function createState(el){
el._vuebarState = {
// config with default values that may be overwritten on directive intialization
config: {
scrollThrottle: 10,
draggerThrottle: 10,
resizeRefresh: true,
observerThrottle: 100,
resizeDebounce: 100,
unselectableBody: true,
overrideFloatingScrollbar: true,
scrollingPhantomDelay: 1000,
draggingPhantomDelay: 1000,
preventParentScroll: false,
useScrollbarPseudo: false, // experimental
el1Class: 'vb',
el1ScrollVisibleClass: 'vb-visible',
el1ScrollInvisibleClass: 'vb-invisible',
el1ScrollingClass: 'vb-scrolling',
el1ScrollingPhantomClass: 'vb-scrolling-phantom',
el1DraggingClass: 'vb-dragging',
el1DraggingPhantomClass: 'vb-dragging-phantom',
el2Class: 'vb-content',
draggerClass: 'vb-dragger',
draggerStylerClass: 'vb-dragger-styler',
},
// reference to binding
binding: null,
// references to directive DOM elements
el1: null,
el2: null,
dragger: null,
// show dragger
draggerEnabled: null,
// properties computed for internal directive logic & DOM manipulations
visibleArea: 0, // ratio between container height and scrollable content height
scrollTop: 0, // position of content scrollTop in px
barTop: 0, // position of dragger in px
barHeight: 0, // height of dragger in px
mouseBarOffsetY: 0, // relative position of mouse at the time of clicking on dragger
barDragging: false, // when the dragger is used
// reference to MutationObserver
mutationObserver: null,
// references to timeouts for DOM class manipulation
scrollingClassTimeout: null,
draggingClassTimeout: null,
scrollingPhantomClassTimeout: null,
draggingPhantomClassTimeout: null,
// references to a functions we'll need when removing events
barMousedown: null,
documentMousemove: null,
documentMouseup: null,
windowResize: null,
scrollHandler: null,
wheelHandler: null,
};
return el._vuebarState;
}
/*------------------------------------*\
Get State
\*------------------------------------*/
function getState(el){
return el._vuebarState;
}
/*------------------------------------*\
Mount Validation
\*------------------------------------*/
function markupValidation(el){
if (!el.firstChild) {
Vue.util.warn('(Vuebar) Element 1 with v-bar directive doesn\'t have required child element 2.');
return false;
}
return true;
}
/*------------------------------------*\
Computing Properties
\*------------------------------------*/
function computeVisibleArea(el){
var state = getState(el);
state.visibleArea = (state.el2.clientHeight / state.el2.scrollHeight);
}
function computeScrollTop(el){
var state = getState(el);
state.scrollTop = state.barTop * (state.el2.scrollHeight / state.el2.clientHeight);
}
function computeBarTop(el, event){
var state = getState(el);
// if the function gets called on scroll event
if (!event) {
state.barTop = state.el2.scrollTop * state.visibleArea;
return false;
} // else the function gets called when moving dragger with mouse
var relativeMouseY = (event.clientY - state.el1.getBoundingClientRect().top);
if (relativeMouseY <= state.mouseBarOffsetY) { // if bar is trying to go over top
state.barTop = 0;
}
if (relativeMouseY > state.mouseBarOffsetY) { // if bar is moving between top and bottom
state.barTop = relativeMouseY - state.mouseBarOffsetY;
}
if ( (state.barTop + state.barHeight ) >= state.el2.clientHeight ) { // if bar is trying to go over bottom
state.barTop = state.el2.clientHeight - state.barHeight;
}
}
function computeBarHeight(el){
var state = getState(el);
if (state.visibleArea >= 1) {
state.barHeight = 0;
} else {
state.barHeight = state.el2.clientHeight * state.visibleArea;
}
}
/*------------------------------------*\
Styles & DOM
\*------------------------------------*/
function createDragger(el){
var state = getState(el);
var dragger = document.createElement('div');
var draggerStyler = document.createElement('div');
dragger.className = state.config.draggerClass;
dragger.style.position = 'absolute';
if (!state.draggerEnabled) {
dragger.style.display = 'none';
}
draggerStyler.className = state.config.draggerStylerClass;
dragger.appendChild(draggerStyler);
state.el1.appendChild(dragger);
return dragger;
}
function updateDragger(el, options){
var options = options ? options : {};
var state = getState(el);
// setting dragger styles
state.dragger.style.height = parseInt( Math.round( state.barHeight) ) + 'px';
state.dragger.style.top = parseInt( Math.round( state.barTop ) ) + 'px';
//state.dragger.style.height = Math.ceil( state.barHeight ) + 'px';
//state.dragger.style.top = Math.ceil( state.barTop ) + 'px';
// scrollbar visible / invisible classes
if (state.draggerEnabled && (state.visibleArea<1)) {
removeClass(state.el1, state.config.el1ScrollInvisibleClass);
addClass(state.el1, state.config.el1ScrollVisibleClass);
} else {
removeClass(state.el1, state.config.el1ScrollVisibleClass);
addClass(state.el1, state.config.el1ScrollInvisibleClass);
}
if (options.withScrollingClasses) {
// add scrolling class
addClass(state.el1, state.config.el1ScrollingClass);
// remove scrolling class
state.scrollingClassTimeout ?
clearTimeout(state.scrollingClassTimeout) : null;
state.scrollingClassTimeout = setTimeout(function() {
removeClass(state.el1, state.config.el1ScrollingClass);
}, state.config.scrollThrottle + 5);
// add phantom scrolling class
addClass(state.el1, state.config.el1ScrollingPhantomClass);
// remove phantom scrolling class
state.scrollingPhantomClassTimeout ?
clearTimeout(state.scrollingPhantomClassTimeout) : null;
state.scrollingPhantomClassTimeout = setTimeout(function() {
removeClass(state.el1, state.config.el1ScrollingPhantomClass);
}, state.config.scrollThrottle + state.config.scrollingPhantomDelay);
}
}
// this is an experimental feature
// - it works only on chrome and safari
// - instead of hiding scrollbar by overflowing it with its parent set to overflow:hidden
// we hide scrollbar using pseudo-element selector ::-webkit-scrollbar
function hideScrollbarUsingPseudoElement(el){
var state = getState(el);
var idName = 'vuebar-pseudo-element-styles';
var selector = '.' + state.config.el2Class + '::-webkit-scrollbar';
var styleElm = document.getElementById(idName);
var sheet = null;
if (styleElm) {
sheet = styleElm.sheet;
} else {
styleElm = document.createElement('style');
styleElm.id = idName;
document.head.appendChild(styleElm);
sheet = styleElm.sheet;
}
// detect if there is a rule already added to the selector
var ruleExists = false;
for(var i=0, l=sheet.rules.length; i<l; i++){
var rule = sheet.rules[i];
if (rule.selectorText == selector) {
ruleExists = true;
}
}
// if there is rule added already then don't continue
if ( ruleExists ) { return false }
// insert rule
// - we only need to use insertRule and don't need to use addRule at all
// because we're only targeting chrome & safari browsers
if (sheet.insertRule) {
sheet.insertRule(selector + '{display:none}', 0);
}
}
function preventParentScroll(el, event){
var state = getState(el);
if (state.visibleArea >= 1) {
return false;
}
var scrollDist = state.el2.scrollHeight - state.el2.clientHeight;
var scrollTop = state.el2.scrollTop;
var wheelingUp = event.deltaY < 0;
var wheelingDown = event.deltaY > 0;
if ( (scrollTop <= 0) && wheelingUp) {
event.preventDefault();
return false;
}
if ( (scrollTop >= scrollDist) && wheelingDown) {
event.preventDefault();
return false;
}
}
function updateScroll(el){
var state = getState(el);
state.el2.scrollTop = state.scrollTop;
}
/*------------------------------------*\
Refresh
\*------------------------------------*/
function refreshScrollbar(el, options){
var options = options ? options : {};
if (options.immediate) {
computeVisibleArea(el);
computeBarTop(el);
computeBarHeight(el);
updateDragger(el);
}
Vue.nextTick(function(){
if ( !getState(el) ) { return false }
computeVisibleArea(el);
computeBarTop(el);
computeBarHeight(el);
updateDragger(el);
}.bind(this));
}
/*------------------------------------*\
Events & Handlers
\*------------------------------------*/
function scrollHandler(el){
var state = getState(el);
return throttle(function(event){
computeVisibleArea(el);
computeBarHeight(el); // fallback for an undetected content change
if (!state.barDragging) {
computeBarTop(el);
updateDragger(el, {withScrollingClasses: true});
}
}.bind(this), state.config.scrollThrottle);
}
function wheelHandler(el){
return function(event){
preventParentScroll(el, event);
}.bind(this);
}
function documentMousemove(el){
var state = getState(el);
return throttle(function(event){
computeBarTop(el, event);
updateDragger(el);
computeScrollTop(el);
updateScroll(el);
}.bind(this), state.config.draggerThrottle);
}
function documentMouseup(el){
var state = getState(el);
return function(event){
//
state.barDragging = false;
// enable user select
state.el1.style.userSelect = '';
state.config.unselectableBody ? compatStyle(document.body, 'UserSelect', '') : null;
// remove dragging class
removeClass(state.el1, state.config.el1DraggingClass);
state.draggingPhantomClassTimeout = setTimeout(function() {
removeClass(state.el1, state.config.el1DraggingPhantomClass);
}, state.config.draggingPhantomDelay);
// remove events
document.removeEventListener('mousemove', state.documentMousemove, 0);
document.removeEventListener('mouseup', state.documentMouseup, 0);
}.bind(this);
}
function barMousedown(el){
var state = getState(el);
return function(event){
// don't do nothing if it's not left mouse button
if ( event.which!==1 ) { return false }
state.barDragging = true;
state.mouseBarOffsetY = event.offsetY;
// disable user select
state.el1.style.userSelect = 'none';
state.config.unselectableBody ? compatStyle(document.body, 'UserSelect', 'none') : null;
// add dragging class
addClass(state.el1, state.config.el1DraggingClass);
state.draggingPhantomClassTimeout ?
clearTimeout(state.draggingPhantomClassTimeout) : null;
addClass(state.el1, state.config.el1DraggingPhantomClass);
// add events
document.addEventListener('mousemove', state.documentMousemove, 0);
document.addEventListener('mouseup', state.documentMouseup, 0);
}.bind(this);
}
function windowResize(el){
var state = getState(el);
return debounce(function(event){
refreshScrollbar(el);
}.bind(this), state.config.resizeDebounce);
}
function initMutationObserver(el){
if (typeof MutationObserver === typeof void 0) { return null }
var state = getState(el);
var observer = new MutationObserver(throttle(function(mutations) {
refreshScrollbar(el);
}, state.config.observerThrottle));
observer.observe(state.el2, {
childList: true,
characterData: true,
subtree: true,
});
return observer;
}
/*------------------------------------*\
Initialize Scrollbar
\*------------------------------------*/
function initScrollbar(el, kwargs){
// validate on directive bind if the markup is OK
if ( !markupValidation.call(this, el) ) { return false }
// safeguard to not initialize vuebar when it's already initialized
if (el._vuebarState) {
// and I'm actually curious if that can happen
Vue.util.warn('(Vuebar) Tried to initialize second time. If you see this please create an issue on https://github.com/DominikSerafin/vuebar with all relevent debug information. Thank you!');
return false;
}
// create state
var state = createState(el);
// get options object
// - it will come from directive binding (there is a 'value' property)
// - or it will come from public method direct options object
var options = kwargs.value ? kwargs.value : (kwargs ? kwargs : {});
// overwrite defaults with provided options
for (var key in options){
state.config[key] = options[key];
}
// detect browser
var browser = detectBrowser();
// dragger enabled?
var elNativeScrollbarWidth = getNativeScrollbarWidth(el.firstElementChild);
var overlayScrollbar = elNativeScrollbarWidth == 0;
state.draggerEnabled = ( (!overlayScrollbar) || state.config.overrideFloatingScrollbar ) ? 1 : 0;
// setup scrollbar "state"
state.binding = kwargs.value ? kwargs : null;
state.el1 = el;
state.el2 = el.firstElementChild;
state.dragger = createDragger(el);
// create and reference event listeners
state.barMousedown = barMousedown(el);
state.documentMousemove = documentMousemove(el);
state.documentMouseup = documentMouseup(el);
state.windowResize = windowResize(el);
state.scrollHandler = scrollHandler(el);
state.wheelHandler = wheelHandler(el);
// initialize and reference mutation observer
state.mutationObserver = initMutationObserver(el);
// el1 styles and class
addClass(state.el1, state.config.el1Class);
state.el1.style.position = 'relative';
state.el1.style.overflow = 'hidden';
// el2 styles and class
addClass(state.el2, state.config.el2Class);
state.el2.style.display = 'block';
state.el2.style.overflowX = 'hidden';
state.el2.style.overflowY = 'scroll';
state.el2.style.height = '100%';
// do the magic
if (state.draggerEnabled) {
// hide original browser scrollbar using pseudo css selectors (only chrome & safari)
if ( state.config.useScrollbarPseudo && (browser.chrome || browser.safari) ) {
state.el2.style.width = '100%';
hideScrollbarUsingPseudoElement(el);
}
// hide original browser overlay scrollbar and add padding to compensate for that
else if (overlayScrollbar) {
/* state.el2.style.width = 'calc(100% + ' + 20 + 'px)';
compatStyle(state.el2, 'BoxSizing', 'border-box'); */
state.el2.style.width = '100%';
compatStyle(state.el2, 'BoxSizing', 'content-box');
state.el2.style.paddingRight = '20px';
}
// hide original browser scrollbar behind element edges and hidden overflow
else {
state.el2.style.width = 'calc(100% + ' + elNativeScrollbarWidth + 'px)';
}
}
// add events
// - wheel event is only needed when preventParentScroll option is enabled
// - resize event is only needed when resizeRefresh option is enabled
state.el2.addEventListener('scroll', state.scrollHandler, 0);
state.dragger.addEventListener('mousedown', state.barMousedown, 0);
state.config.preventParentScroll ? state.el2.addEventListener('wheel', state.wheelHandler, 0) : null;
state.config.resizeRefresh ? window.addEventListener('resize', state.windowResize, 0) : null;
// initial calculations using refresh scrollbar
refreshScrollbar(el, {immediate: true});
}
/*------------------------------------*\
Destroy Scrollbar
\*------------------------------------*/
function destroyScrollbar(el, options){
var options = options ? options : {};
var state = getState(el);
if (!state) return;
// clear events
state.dragger.removeEventListener('mousedown', state.barMousedown, 0);
state.el2.removeEventListener('scroll', state.scrollHandler, 0);
state.el2.removeEventListener('wheel', state.wheelHandler, 0);
window.removeEventListener('resize', state.windowResize, 0);
// disconnect mutation observer
state.mutationObserver ? state.mutationObserver.disconnect() : null;
// clear el1 classes
removeClass(state.el1, state.config.el1Class);
removeClass(state.el1, state.config.el1ScrollVisibleClass);
removeClass(state.el1, state.config.el1ScrollInvisibleClass);
removeClass(state.el1, state.config.el1ScrollingClass);
removeClass(state.el1, state.config.el1ScrollingPhantomClass);
removeClass(state.el1, state.config.el1DraggingClass);
// clear el1 styles
if (options.clearStyles) {
state.el1.style.position = '';
state.el1.style.overflow = '';
}
// clear el2 classes
removeClass(state.el2, state.config.el2Class);
// clear el2 styles
if (options.clearStyles) {
state.el2.style.display = '';
state.el2.style.overflowX = '';
state.el2.style.overflowY = '';
state.el2.style.msOverflowStyle = '';
state.el2.style.height = '';
state.el2.style.width = '';
}
// clear dragger
state.dragger.removeChild(state.dragger.firstChild);
state.el1.removeChild(state.dragger);
// clear timeouts that may be still running
state.scrollingPhantomClassTimeout ?
clearTimeout(state.scrollingPhantomClassTimeout) : null;
state.draggingPhantomClassTimeout ?
clearTimeout(state.draggingPhantomClassTimeout) : null;
// delete state object from element
delete el._vuebarState;
}
/*------------------------------------*\
Public Methods Install
\*------------------------------------*/
function publicMethods(){
return {
getState: getState,
initScrollbar: initScrollbar,
destroyScrollbar: destroyScrollbar,
refreshScrollbar: refreshScrollbar,
};
}
Vue.vuebar = publicMethods();
Vue.prototype.$vuebar = publicMethods();
/*------------------------------------*\
Directive Install
\*------------------------------------*/
Vue.directive(installOptions.directive, {
inserted: function(el, binding, vnode){
initScrollbar.call(this, el, binding);
},
componentUpdated: function(el, binding, vnode, oldVnode){
refreshScrollbar.call(this, el);
},
unbind: function(el, binding, vnode, oldVnode){
// we shouldn't clearStyles because it actually doesn't matter that much
// the element will be always deleted on unbind and its styles also
// and if we do clear styles then it looks bad on transitions
destroyScrollbar.call(this, el, {clearStyles: false});
},
});
/*------------------------------------*\
Debounce Helper
https://remysharp.com/2010/07/21/throttling-function-calls
\*------------------------------------*/
function debounce(fn, delay) {
var timer = null;
return function () {
var context = this, args = arguments;
clearTimeout(timer);
timer = setTimeout(function () {
fn.apply(context, args);
}, delay);
};
};
/*------------------------------------*\
Throttle Helper
https://remysharp.com/2010/07/21/throttling-function-calls
\*------------------------------------*/
function throttle(fn, threshhold, scope) {
threshhold || (threshhold = 250);
var last,
deferTimer;
return function () {
var context = scope || this;
var now = +new Date,
args = arguments;
if (last && now < last + threshhold) {
// hold on to it
clearTimeout(deferTimer);
deferTimer = setTimeout(function () {
last = now;
fn.apply(context, args);
}, threshhold);
} else {
last = now;
fn.apply(context, args);
}
}
}
/*------------------------------------*\
Style Vendor Prefixes Helper
\*------------------------------------*/
function compatStyle(element, property, value) {
element.style['webkit' + property] = value;
element.style['moz' + property] = value;
element.style['ms' + property] = value;
element.style['o' + property] = value;
element.style[ property.slice(0,1).toLowerCase() + property.substring(1) ] = value;
}
/*------------------------------------*\
Class Manipulation Helpers
https://plainjs.com/javascript/attributes/adding-removing-and-testing-for-classes-9/
\*------------------------------------*/
function hasClass(el, className) {
return el.classList ? el.classList.contains(className) : new RegExp('\\b'+ className+'\\b').test(el.className);
}
function addClass(el, className) {
if (el.classList) el.classList.add(className);
else if (!hasClass(el, className)) el.className += ' ' + className;
}
function removeClass(el, className) {
if (el.classList) el.classList.remove(className);
else el.className = el.className.replace(new RegExp('\\b'+ className+'\\b', 'g'), '');
}
/*------------------------------------*\
Browser Detection Helper
\*------------------------------------*/
function detectBrowser(){
// get ie version helper
function getIEVersion() {
var match = window.navigator.userAgent.match(/(?:MSIE |Trident\/.*; rv:)(\d+)/);
return match ? parseInt(match[1]) : void 0;
}
// user agent & vendor
var ua = window.navigator.userAgent;
var vendor = window.navigator.vendor;
// chrome
var chrome = (
(ua.toLowerCase().indexOf('chrome') > -1) && (vendor.toLowerCase().indexOf('google') > -1)
);
// edge
var edge = ua.indexOf('Edge') > -1;
// safari
var safari = !!window.safari || ((ua.toLowerCase().indexOf('safari') > -1) && (vendor.toLowerCase().indexOf('apple') > -1));
// internet explorer
var ie8 = getIEVersion() == 8;
var ie9 = getIEVersion() == 9;
var ie10 = getIEVersion() == 10;
var ie11 = getIEVersion() == 11;
var ie = ie8 || ie9 || ie10 || ie11;
// is it mobile browser?
// regex below thanks to http://detectmobilebrowsers.com/
var uaOrVendor = ua || vendor || window.opera;
var mobile = (/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino/i.test(uaOrVendor)||/1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(uaOrVendor.substr(0,4)));
// construct return object
return {
edge: edge,
chrome: chrome,
safari: safari,
mobile: mobile,
ie: ie,
ie8: ie8,
ie9: ie9,
ie10: ie10,
ie11: ie11,
};
}
/*------------------------------------*\
Calculate scrollbar width in element
- if the width is 0 it means the scrollbar is floated/overlayed
- accepts "container" paremeter because ie & edge can have different
scrollbar behaviors for different elements using '-ms-overflow-style'
\*------------------------------------*/
function getNativeScrollbarWidth(container) {
var container = container ? container : document.body;
var fullWidth = 0;
var barWidth = 0;
var wrapper = document.createElement('div');
var child = document.createElement('div');
wrapper.style.position = 'absolute';
wrapper.style.pointerEvents = 'none';
wrapper.style.bottom = '0';
wrapper.style.right = '0';
wrapper.style.width = '100px';
wrapper.style.overflow = 'hidden';
wrapper.appendChild(child);
container.appendChild(wrapper);
fullWidth = child.offsetWidth;
child.style.width = '100%';
wrapper.style.overflowY = 'scroll';
barWidth = fullWidth - child.offsetWidth;
container.removeChild(wrapper);
return barWidth;
}
};
/*------------------------------------*\
Expose / Autoinstall
\*------------------------------------*/
if (typeof exports === 'object' && typeof module === 'object') {
module.exports = Vuebar;
} else if (typeof define === 'function' && define.amd) {
define(function () { return Vuebar });
} else if (typeof window !== typeof void 0) {
window.Vuebar = Vuebar;
}
if (typeof Vue !== typeof void 0) {
Vue.use(Vuebar);
}
})();