infinite scroll
As of
This script should not be not be installed directly. It is a library for other scripts to include with the meta directive // @require https://update.greasyfork.org/scripts/548609/1656006/pagination-manager2.js
// ==UserScript==
// @name pagination-manager2
// @description infinite scroll
// @namespace Violentmonkey Scripts
// @author smartacephale
// @license MIT
// @version 1.43
// @match *://*/*
// @grant unsafeWindow
// @downloadURL https://update.greasyfork.org/scripts/494205/pagination-manager.user.js
// @updateURL https://update.greasyfork.org/scripts/494205/pagination-manager.meta.js
// ==/UserScript==
class PaginationManager {
/**
* @param {Vue.reactive} state
* @param {Vue.reactive} stateLocale
* @param {Rules} rules - WEBSITE_RULES class with methods:
* - URL_DATA { iteratable_url, offset },
* - PAGINATION_LAST
* @param {Function} handleHtmlCallback
* @param {number} delay - milliseconds
* @param {Function} [alternativeGenerator] - Optional custom generator function
*/
constructor(state, stateLocale, rules, handleHtmlCallback, delay, alternativeGenerator) {
const { offset, iteratable_url } = rules.URL_DATA();
Object.assign(this, { state, stateLocale, rules, handleHtmlCallback, delay });
Object.assign(this.stateLocale, { pagIndexLast: rules.PAGINATION_LAST, pagIndexCur: offset });
this.paginationGenerator = alternativeGenerator?.() ??
PaginationManager.createPaginationGenerator(offset, rules.PAGINATION_LAST, iteratable_url);
this.createPaginationObserver();
}
createPaginationObserver() {
const observable = this.rules.INTERSECTION_OBSERVABLE || this.rules.PAGINATION;
unsafeWindow.bhutils.Observer.observeWhile(observable, this.generatorConsumer, this.delay);
}
generatorConsumer = async () => {
if (!this.state.infiniteScrollEnabled) return;
const { value: { url, offset } = {}, done } = await this.paginationGenerator.next();
if (!done) {
const nextPageHTML = await unsafeWindow.bhutils.fetchHtml(url);
const prevScrollPos = document.documentElement.scrollTop;
this.handleHtmlCallback(nextPageHTML);
this.stateLocale.pagIndexCur = offset;
window.scrollTo(0, prevScrollPos);
}
return !done;
}
static * createPaginationGenerator(currentPage, totalPages, generateURL) {
for (let p = currentPage + 1; p <= totalPages; p++) {
const url = generateURL(p);
yield { url, offset: p };
}
}
}