Danbooru: Enable tag-based grouping.

This script hacks the tags you searched into Danbooru search link URLs so that you can navigate from individual posts to the next or previous post in the search.

// ==UserScript==
// @name         Danbooru: Enable tag-based grouping.
// @namespace    http://tampermonkey.net/
// @version      0.2
// @description  This script hacks the tags you searched into Danbooru search link URLs so that you can navigate from individual posts to the next or previous post in the search.
// @author       FPX
// @match        https://danbooru.donmai.us/
// @match        http://danbooru.donmai.us/
// @match        https://danbooru.donmai.us/posts?*
// @match        http://danbooru.donmai.us/posts?*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    // Your code here...
    var arr = document.location.href.split("tags");
    var tags = arr[1];
    if (tags === undefined) {
        return;
    }
    var image_links = document.getElementsByClassName("post-preview");
    for (var i = 0; i < image_links.length; i++) {
        var link = image_links[i].children[0];
        link.href = link.href + "?tags" + tags;
    }
})();