73 lines
1.8 KiB
JavaScript
73 lines
1.8 KiB
JavaScript
(() => {
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const ENDLESS_SCROLL_BOTTOM_PX = 400;
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const ENDLESS_SCROLL_FIRE_DELAY_MS = 1000;
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const Pager = {
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init(limit = 0, preload = false, disable = false, callback = $.noop) {
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this.limit = limit;
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this.offset = this.limit;
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this.disable = disable;
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this.callback = callback;
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this.loading = $('.loading').first();
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if (preload) {
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this.offset = 0;
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this.getOld();
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}
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this.initLoadMore();
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},
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getOld() {
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this.loading.show();
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$.ajax({
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type: 'GET',
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url: $('.content_list').data('href') || window.location.href,
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data: `limit=${this.limit}&offset=${this.offset}`,
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dataType: 'json',
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error: () => this.loading.hide(),
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success: (data) => {
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this.append(data.count, data.html);
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this.callback();
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// keep loading until we've filled the viewport height
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if (!this.disable && !this.isScrollable()) {
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this.getOld();
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} else {
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this.loading.hide();
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}
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},
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});
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},
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append(count, html) {
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$('.content_list').append(html);
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if (count > 0) {
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this.offset += count;
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} else {
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this.disable = true;
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}
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},
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isScrollable() {
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const $w = $(window);
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return $(document).height() > $w.height() + $w.scrollTop() + ENDLESS_SCROLL_BOTTOM_PX;
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},
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initLoadMore() {
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$(document).unbind('scroll');
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$(document).endlessScroll({
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bottomPixels: ENDLESS_SCROLL_BOTTOM_PX,
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fireDelay: ENDLESS_SCROLL_FIRE_DELAY_MS,
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fireOnce: true,
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ceaseFire: () => this.disable === true,
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callback: () => {
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if (!this.loading.is(':visible')) {
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this.loading.show();
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this.getOld();
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}
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},
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});
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},
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};
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window.Pager = Pager;
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})();
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