103 lines
2.9 KiB
JavaScript
103 lines
2.9 KiB
JavaScript
let loaderOffset = 10;
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let loadCount = 10;
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let loaderReachedEnd = false;
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let startAt = null;
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let isLoaderLoading = false;
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let loadUri = '';
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let loaderResponseId = '';
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let additionalParams = [];
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function initLoader(location, loaderId, count = 10, start = count, additional = []) {
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loadUri = location;
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loaderResponseId = loaderId;
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loadCount = count;
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loaderOffset = start;
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additionalParams = additional;
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setupListeners();
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}
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function loadMoreItems() {
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if (isLoaderLoading || loaderReachedEnd) {
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return false;
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}
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showLoader();
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isLoaderLoading = true;
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let params = { offset: loaderOffset, count: loadCount, startAt: startAt };
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for (i = 0; i < additionalParams.length; i++) {
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let param = additionalParams[i];
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params[param.name] = param.value;
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}
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$.get(loadUri, params)
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.done(function (response) {
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$(loaderResponseId).append(response);
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if (response.trim().length === 0) {
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staleLoader();
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loaderReachedEnd = true;
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$('.loader-load-more').addClass('disabled');
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}
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$(document).trigger("loaderFinished", response);
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startAt = $(response).filter('.loader-data-time').last().data('time');
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hideLoader();
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isLoaderLoading = false;
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})
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.fail(function (jqxhr, statis, error) {
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errorLoader();
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isLoaderLoading = false;
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});
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loaderOffset += loadCount;
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}
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var hasScrollBar = false;
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function _ScrollHandler(e) {
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//throttle event:
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/*
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https://stackoverflow.com/questions/3898130/check-if-a-user-has-scrolled-to-the-bottom
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*/
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var $window = $(window);
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var $document = $(document);
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hasScrollBar = true;
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let _throttleTimer = null;
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let _throttleDelay = 100;
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clearTimeout(_throttleTimer);
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_throttleTimer = setTimeout(function () {
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//do work
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if ($window.scrollTop() + $window.height() > $document.height() - 100) {
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loadMoreItems();
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}
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}, _throttleDelay);
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}
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function setupListeners() {
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if ($(loaderResponseId).length === 1) {
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/*
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https://stackoverflow.com/questions/19731730/jquery-js-detect-users-scroll-attempt-without-any-window-overflow-to-scroll
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*/
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$('html').bind('mousewheel DOMMouseScroll', function (e) {
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var delta = e.originalEvent.wheelDelta || -e.originalEvent.detail;
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if (delta < 0 && !hasScrollBar) {
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loadMoreItems();
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}
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});
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$(document).ready(function () {
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$(window)
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.off('scroll', _ScrollHandler)
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.on('scroll', _ScrollHandler);
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$('.loader-load-more:not(.disabled)').click(function (e) {
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if (!isLoaderLoading) {
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loadMoreItems();
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}
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});
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});
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}
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} |