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(function (exports,ui_vue) {
'use strict';
/**
* Image Lazy Load Vue directive
*
* @package bitrix
* @subpackage ui
* @copyright 2001-2019 Bitrix
*/
var WATCH = 'bx-lazyload-watch';
var LOADING = 'bx-lazyload-loading';
var SUCCESS = 'bx-lazyload-success';
var ERROR = 'bx-lazyload-error';
var HIDDEN = 'bx-lazyload-hidden';
var BLANK_IMAGE = "data:image/svg+xml,%3Csvg width='1px' height='1px' xmlns='http://www.w3.org/2000/svg'%3E%3C/svg%3E";
var lazyloadObserver = null;
var lazyloadLoadImage = function lazyloadLoadImage(currentImage, callback) {
var SUCCESS_CLASS = currentImage.dataset.lazyloadSuccessClass ? currentImage.dataset.lazyloadSuccessClass.split(" ") : [];
delete currentImage.dataset.lazyloadSuccessClass;
SUCCESS_CLASS = [SUCCESS].concat(babelHelpers.toConsumableArray(SUCCESS_CLASS));
var ERROR_CLASS = currentImage.dataset.lazyloadErrorClass ? currentImage.dataset.lazyloadErrorClass.split(" ") : [];
delete currentImage.dataset.lazyloadErrorClass;
ERROR_CLASS = [ERROR].concat(babelHelpers.toConsumableArray(ERROR_CLASS));
currentImage.classList.add(LOADING);
var newImage = new Image();
newImage.src = currentImage.dataset.lazyloadSrc;
if (!currentImage.dataset.lazyloadHiddenSrc) {
currentImage.dataset.lazyloadHiddenSrc = currentImage.src;
}
newImage.onload = function () {
var _currentImage$classLi;
if (currentImage.classList.contains(HIDDEN)) {
return false;
}
if (currentImage.dataset.lazyloadSrc) {
currentImage.src = currentImage.dataset.lazyloadSrc;
}
currentImage.classList.remove(LOADING);
(_currentImage$classLi = currentImage.classList).add.apply(_currentImage$classLi, babelHelpers.toConsumableArray(SUCCESS_CLASS));
if (typeof currentImage.lazyloadCallback === 'function') {
currentImage.lazyloadCallback({
element: currentImage,
state: 'success'
});
delete currentImage.lazyloadCallback;
}
};
newImage.onerror = function () {
var _currentImage$classLi2;
if (currentImage.classList.contains(HIDDEN)) {
return false;
}
currentImage.classList.remove(LOADING);
(_currentImage$classLi2 = currentImage.classList).add.apply(_currentImage$classLi2, babelHelpers.toConsumableArray(ERROR_CLASS));
currentImage.title = '';
currentImage.alt = '';
if (typeof currentImage.lazyloadCallback === 'function') {
currentImage.lazyloadCallback({
element: currentImage,
state: 'error'
});
delete currentImage.lazyloadCallback;
}
};
if (typeof currentImage.dataset.lazyloadDontHide !== 'undefined') {
currentImage.classList.remove(WATCH);
delete currentImage.dataset.lazyloadDontHide;
if (lazyloadObserver) {
lazyloadObserver.unobserve(currentImage);
}
}
};
if (typeof window.IntersectionObserver !== 'undefined') {
lazyloadObserver = new IntersectionObserver(function (entries, observer) {
entries.forEach(function (entry) {
var currentImage = entry.target;
if (entry.isIntersecting) {
if (currentImage.classList.contains(HIDDEN)) {
if (currentImage.dataset.lazyloadSrc) {
currentImage.src = currentImage.dataset.lazyloadSrc;
}
currentImage.classList.remove(HIDDEN);
} else if (currentImage.classList.contains(WATCH)) {
return true;
} else {
currentImage.classList.add(WATCH);
lazyloadLoadImage(currentImage);
}
} else {
if (currentImage.classList.contains(HIDDEN) || !currentImage.classList.contains(WATCH)) {
return true;
}
if (currentImage.dataset.lazyloadHiddenSrc) {
currentImage.src = currentImage.dataset.lazyloadHiddenSrc;
}
currentImage.classList.remove(LOADING);
currentImage.classList.add(HIDDEN);
}
});
}, {
threshold: [0, 1]
});
}
ui_vue.BitrixVue.directive('bx-lazyload', {
bind: function bind(element, bindings) {
if (babelHelpers.typeof(bindings.value) === 'object' && typeof bindings.value.callback === 'function') {
element.lazyloadCallback = bindings.value.callback;
}
if (!element.src || element.src === location.href.replace(location.hash, '')) {
element.src = BLANK_IMAGE;
}
if (lazyloadObserver) {
lazyloadObserver.observe(element);
} else {
lazyloadLoadImage(element);
}
},
componentUpdated: function componentUpdated(element) {
if (!element.classList.contains(SUCCESS) && !element.classList.contains(ERROR) && !element.classList.contains(WATCH) && !element.classList.contains(LOADING)) {
element.classList.add(LOADING);
} else if ((element.classList.contains(SUCCESS) || element.classList.contains(ERROR)) && element.dataset.lazyloadSrc && element.dataset.lazyloadSrc !== element.src) {
if (!element.dataset.lazyloadSrc.startsWith('http')) {
var url = document.createElement('a');
url.href = element.dataset.lazyloadSrc;
if (url.href === element.src) {
return;
}
}
lazyloadLoadImage(element);
}
},
unbind: function unbind(element) {
if (lazyloadObserver) {
lazyloadObserver.unobserve(element);
}
}
});
}((this.window = this.window || {}),BX));
//# sourceMappingURL=lazyload.bundle.js.map