Allow to quickly sort posts by score on Derpibooru

derpibooruScoreSort.user.js

// ==UserScript==
// @name         Derpibooru Score Sort
// @namespace    oxie.cc

// @include      /http[s]*:\/\/(www\.|philomena\.|)(trixie|derpi)booru.org\/.*/
// @exclude      /http[s]*:\/\/(www\.|philomena\.|)(trixie|derpi)booru.org\/(adverts\/|.*\.json).*/

// @version      0.1
// @description  Allow to quickly sort posts by score on Derpibooru
// @author       loxaxs
// @grant        none
// @run-at       document-end
// ==/UserScript==

let main = () => {
    'use strict'

    // console.log('Derpibooru Score Sort - Beginning')

    let crel = (name) => document.createElement(name)

    let a = crel('a')
    a.classList.add('header__search__button')
    a.classList.add('interaction--upvote')
    a.href = '#'
    a.rel = 'nofollow'
    a.onclick = () => {
        let form = document.querySelector('#searchform')
        let sf = form.querySelector('#sf')
        sf.value = 'score'
        form.submit()
    }

    let i = crel('i')
    i.classList.add('fa')
    i.classList.add('fa-arrow-up')
    i.title = 'Sort by score'

    a.appendChild(i)

    let header_form = document.querySelector('form.header__search')
    header_form.insertBefore(a, header_form.firstElementChild.nextElementSibling)
}

main()