Spotify - Random Buttons

gistfile1.txt

// ==UserScript==
// @name         Spotify - Random Buttons
// @namespace    spotify-random-buttons
// @version      0.1
// @description  Add missing randomize features to Spotify.
// @author       Mark McEver
// @match        https://open.spotify.com/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=spotify.com
// @grant        none
// ==/UserScript==

setTimeout(() => {
    const randomInteger = (min, max) => {
        return Math.floor(Math.random() * (max - min + 1)) + min
    }

    const addRandomButton = (parent) => {
        const button = document.createElement('button')
        button.innerHTML = 'Random'

        button.addEventListener('click', () => {
            const items = document.querySelectorAll('[data-testid=grid-container] a')
            const i = randomInteger(0, items.length)
            items[i].click()
        })

        parent.appendChild(button)
    }

    if(location.href.endsWith('/collection/artists')){
        const header = document.querySelector('main > section > div:first-child > h1')
        addRandomButton(header)
    }
    else if(location.href.endsWith('/discography/album')){
        const header = document.querySelector('main > section a').parentElement
        addRandomButton(header)
    }
}, 3000)