67 lines
1.8 KiB
JavaScript
67 lines
1.8 KiB
JavaScript
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/*jslint browser: true, indent: 4 */
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/*
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Example use of ScrollGuard: a simple, unobtrusive lazy loader.
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Each time the user scrolled to the bottom of the page:
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1. Look if there is content to load (lookForNextPage)
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2. If new content, get content using Ajax (getNextPage)
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3. Append the new content and do some polish (appencContent)
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*/
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(function (g) {
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"use strict";
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var lookForNextPage,
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getNextPage,
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appendContent;
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if (g.ScrollGuard === undefined) {
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throw new Error("scrollguard.js is required!");
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}
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appendContent = function (content) {
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var body, rows, i, max, newContent, table;
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body = document.createElement("div");
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body.innerHTML = content;
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newContent = document.createDocumentFragment();
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rows = body.querySelectorAll(".main-c table tr");
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for (i = 1, max = rows.length; i < max; i += 1) {
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newContent.appendChild(rows[i]);
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}
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table = document.querySelector(".main-c table").tBodies[0];
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table.replaceChild(newContent, table.querySelector("tr.pagination"));
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};
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lookForNextPage = function () {
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var nextPage = document.getElementById("pager-next");
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if (nextPage) {
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getNextPage(nextPage.href);
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}
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};
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getNextPage = function (href) {
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var request = new XMLHttpRequest();
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request.onreadystatechange = function () {
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if (request.readyState === 4) {
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if (request.status === 200 || request.status === 304) {
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appendContent(request.responseText);
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}
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}
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};
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request.open("GET", href, true);
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request.send(null);
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};
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if (document.getElementById("pager-next")) {
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g.ScrollGuard.add(lookForNextPage, -1);
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g.ScrollGuard.start();
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}
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}(this));
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