make tierlist on seasonal anime page
// ==UserScript==
// @name MAL tierlist
// @namespace pepe
// @version 2025-09-15
// @description make tierlist on seasonal anime page
// @author pepe
// @match https://myanimelist.net/anime/season*
// @icon https://www.google.com/s2/favicons?sz=64&domain=myanimelist.net
// @require https://code.jquery.com/ui/1.13.2/jquery-ui.js
// @license MIT
// @grant none
// ==/UserScript==
/* global $ */
/* global html2canvas */
(function() {
// for image downloading but doesnt work yet, so its not included
// @require https://html2canvas.hertzen.com/dist/html2canvas.js
// fix padding in header to fit tierlist in older seasons
if(document.querySelectorAll('.navtab')[0].textContent == 'Current Season'){
document.head.innerHTML += `<style>
.dark-mode .navi-seasonal .horiznav_nav ul li a {
padding: 5px 8px;
}
</style>`
}
create_tierlist_button:{
let tierlist_button = document.createElement(`li`)
tierlist_button.classList.add('btn-type')
tierlist_button.innerHTML = `<a id="createtier" href="#" class="navtab ">Tierlist</a>`
tierlist_button.onclick = function(event){
event.preventDefault(); // disable default link click, interferes with scroll
RenderTierlist();
}
let seasonal_header = document.querySelector('ul.btn-seasonal')
seasonal_header.append(tierlist_button);
}
let tierlist_html = `
<div id="tierlist">
<style>
:root {
--image-width: 80px;
--image-height: 113px;
}
ul.droptrue { list-style-type: none; margin: 0px; float: left; margin-right: 0px; padding: 0px; min-width: 100%; min-height: 80px;}
ul.droptrue li { float: left; margin: 2px; font-size: 16px; height: var(--image-height); overflow: hidden;}
.grid-container {
margin-top: 2px;
display: none;
grid-template-columns: 1fr 11fr;
grid-gap: 0px;
}
.grid-container1 {
grid-template-columns: 1fr 4fr 3fr 2fr 2fr;
}
.grid-container2 {
grid-template-columns: 1fr 11fr;
}
.textarea {
display: flex; align-items: center; text-align: center; height: var(--image-height); width: auto; padding: 0px!important; border: 0px!important; justify-content: center;
}
ul {display: block;
list-style-type: disc;
margin-block-start: 0;
margin-block-end: 0;
margin-inline-start: 0px;
margin-inline-end: 0px;
padding-inline-start: 0;
margin: 2px;
padding: 0;
}
.dropfalse div { height: 100%; font-size:14px!important;width:90px;}
#tier_s div, #header_s div { background-color: #2e51a2;}
#tier1 div, #header_1 div { background-color: green;}
#tier2 div, #header_2 div { background-color: oklch(0.70 0.18 126.62 / 1);}
#tier3 div, #header_3 div { background-color: oklch(0.75 0.2 70.66 / 1);}
#tier4 div { background-color: orangered;}
#tier5 div { background-color: darkred;}
</style>
<div style="position: absolute; right: 0; padding-top: 0px; display:grid;">
<details style="width:80px; ">
<summary style="cursor: pointer;"><a>FILE</a></summary>
<div style="">
<a id="deletetierlist" href="#" style="color: orange;" >DELETE</a>
<a id="import" href="#">IMPORT</a>
<a id="downloadLink" href="#" download="mal_tierlist_backup.json">EXPORT</a>
</div>
</details>
<a href="#"
onClick="
event.preventDefault();
document.querySelector('#contentWrapper').style.display = 'block';
document.querySelectorAll('.grid-container')[0].style.display = 'none';
document.querySelectorAll('.grid-container')[1].style.display = 'none';
document.documentElement.scrollTop = localStorage.getItem('scrollPosition');
"
>CLOSE</a>
</div>
${generateTiers()}
<!--
<ul id="tier_s" class="dropfalse">
<div class="textarea" contenteditable="true">S</div>
</ul>
<ul id="s" class="droptrue"></ul>
<ul id="tier1" class="dropfalse">
<div class="textarea" contenteditable="true">A</div>
</ul>
<ul id="sortable1" class="droptrue"></ul>
<ul id="tier2" class="dropfalse">
<div class="textarea" contenteditable="true">B</div>
</ul>
<ul id="sortable2" class="droptrue"></ul>
<ul id="tier3" class="dropfalse">
<div class="textarea" contenteditable="true">C</div>
</ul>
<ul id="sortable3" class="droptrue"></ul>
<ul id="tier4" class="dropfalse">
<div class="textarea" contenteditable="true">D</div>
</ul>
<ul id="sortable4" class="droptrue"></ul>
<ul id="tier5" class="dropfalse">
<div class="textarea" contenteditable="true">E</div>
</ul>
<ul id="sortable5" class="droptrue"></ul>
-->
<!-- this grid not in image -->
<div class="grid-container grid-container2">
<ul id="tier_last" class="dropfalse">
<div class="textarea" contenteditable="true">F</div>
</ul>
<ul id="last" class="droptrue"></ul>
</div>
</div>
`
function generateTiers(){
let tiers = 'S,A,B,C,D,E'
let html = tiers.split(/[, ]/).map((tier, i) =>
`<ul id="tier${i==0?'_s':i}" class="dropfalse">
<div class="textarea" contenteditable="true">${tier}</div>
</ul>
<ul id="${i==0?'s':'sortable'+i}" class="droptrue"></ul>`)
return `<div class="grid-container">`+html.join('\n')+`</div>`
}
function generateGridTiers(){
let tiers = 'S,A,B,C,D,E'
let html = `<div class="grid-container grid-container1"><ul id="tier_header" class="dropfalse" style="height: var(--image-height)">
</ul>
<ul id="header_s" class="dropfalse"><div class="textarea" contenteditable="true">Carry</div></ul>
<ul id="header_1" class="dropfalse"><div class="textarea" contenteditable="true">Tactical</div></ul>
<ul id="header_2" class="dropfalse"><div class="textarea" contenteditable="true">Dark Horse</div></ul>
<ul id="header_3" class="dropfalse"><div class="textarea" contenteditable="true">Misc</div></ul>`
html += tiers.split(/[, ]/).map((tier, i) =>
`<ul id="tier${i==0?'_s':i}" class="dropfalse">
<div class="textarea" contenteditable="true">${tier}</div>
</ul>
${createColumns(tier)}`).join('\n')
return html+`</div>`
}
function createColumns(tier){
return Array.from(Array(4)).map((v,i) => `<ul id="${tier==0?'s'+i:`sortable${i}${tier}`}" class="droptrue"></ul>`).join('\n')
}
function RenderTierlist(){
localStorage.setItem('scrollPosition', document.documentElement.scrollTop)
// prevent duplicate from being rendered, insert html
try{document.getElementById('tierlist').remove();}catch(e){}
document.querySelector('#contentWrapper').insertAdjacentHTML("afterend", tierlist_html);
// hide seasonal, show tier
document.querySelector('#contentWrapper').style.display = 'none';
document.querySelectorAll('.grid-container')[0].style.display = 'grid';
document.querySelectorAll('.grid-container')[1].style.display = 'grid';
// jqueryui sortable
$( "ul.droptrue" ).sortable({
connectWith: "ul.droptrue"
});
// loop seasonal images and put them to tierlist
let new_shows = document.querySelectorAll('.js-seasonal-anime-list-key-1 .js-seasonal-anime img, .js-seasonal-anime-list-key-5 .js-seasonal-anime img')
let season = document.querySelector("#content .season_nav .on").textContent
let tierlist = JSON.parse(localStorage.getItem(season));
let tiersOrdered = Array.from({length: tierlist?.tiers?.length}, i => []);
// create ordered list
for(let anime of new_shows){
let id = anime.parentElement.href.match(/(?<=anime\/)\d+/)[0]
let members = anime.parentElement.parentElement.parentElement.querySelector('.member').textContent
members = members.match(/[\d.]+/) * ( members.match(/M/) ? 1000000 : ( members.match(/K/) ? 1000 : 1 ) )
if(members < 3000) continue; // skip if low members
if(tierlist && tierlist[id]){ // old tierlist by sort
document.querySelector('#'+tierlist[id]).innerHTML += `<li id="${id}" class="">${anime.outerHTML.replace('167', '80')}</li>`
}else if(tierlist && tierlist.version == 2 && tierlist.tiers.flat().includes(id)){ // new ordered tierlist
for(let tier_index of Object.keys(tierlist.tiers)){
if(!tierlist.tiers[tier_index].includes(id)) continue
let anime_index = tierlist.tiers[tier_index].indexOf(id)
let element = `<li id="${id}" class="">${anime.outerHTML.replace('167', '80')}</li>`
tiersOrdered[tier_index] ??= []
tiersOrdered[tier_index][anime_index] = element
}
}else{ // add shows to last tier by default
document.querySelector('#last').innerHTML += `<li id="${id}" class="">${anime.outerHTML.replace('167', '80')}</li>`
}
}
// insert anime to tierlist
if(tierlist && tierlist.version == 2){
for(let tier_index of Object.keys(tierlist.tiers)){
let tier_row = document.getElementsByClassName('grid-container')[0].querySelectorAll('ul.droptrue')[tier_index]
tier_row.innerHTML = tiersOrdered[tier_index].join('\n')
}
}
// tier label names
let tier_names = tierlist?.tier_names ?? JSON.parse(localStorage.getItem('tier_names'+season))
if(tier_names){
for(let [i, textareas] of document.querySelectorAll('ul div.textarea').entries()){
textareas.innerText = tier_names[i]
}
// document.querySelectorAll('ul div.textarea').entries().forEach((i, textareas) => { textareas.innerText = tier_names[i] })
}
document.querySelector('#menu').scrollIntoView(); // window.scrollTo(0, 50);
// automatic save when making tierlist
// https://stackoverflow.com/questions/3219758/detect-changes-in-the-dom/3219767#3219767
var targetNode = document.getElementsByClassName('grid-container')[0];
var config = { subtree: true, childList: true, characterData: true,}; // works with this config
var observer = new MutationObserver(SaveTierlistV2);
observer.observe(targetNode, config); // detect dom change when creating tierlist
// delete button event
document.querySelector('#deletetierlist').onclick = function(event){
event.preventDefault(); // disable default link click
if (confirm('Delete tierlist from localstorage?')) {
let season = document.querySelector("#content .season_nav .on").textContent
localStorage.removeItem(season);
localStorage.removeItem('tier_names'+season);
RenderTierlist();
}
};
// backup button
document.getElementById("downloadLink").addEventListener("click", function(e) {
const data = JSON.stringify(Object.fromEntries(Object.keys(localStorage).filter(key => ["Winter","Spring","Summer","Fall"].some(s => key.includes(s)) && key.match(/\d\d\d\d/)).map(key => [key,JSON.parse(localStorage.getItem(key))])))
const blob = new Blob([data], { type: 'text/plain' });
this.href = URL.createObjectURL(blob);
});
// import button
document.getElementById("import").addEventListener("click", async function(e) {
e.preventDefault();
const fileInput = document.createElement("input");
fileInput.type = "file";
fileInput.click();
fileInput.addEventListener("change", async function(event) {
const file = event.target.files[0];
if (!file) return;
const reader = new FileReader();
reader.onload = () => {
try {
for (const [key, val] of Object.entries(JSON.parse(reader.result))) {
localStorage.setItem(key, JSON.stringify(val));
}
RenderTierlist()
console.log("File import complete.");
} catch (err) {
console.error("Error processing file:", err);
}
};
reader.readAsText(file);
});
});
}
function SaveTierlist(){
let season = document.querySelector("#content .season_nav .on").textContent
let tierlist = {}
for(let tier of document.getElementsByClassName('grid-container')[0].querySelectorAll('ul.droptrue')){
for(let anime of tier.querySelectorAll('li')){
tierlist[anime.id] = tier.id
}
}
localStorage.setItem(season, JSON.stringify(tierlist));
let tier_names = Array.from(document.querySelectorAll('ul div.textarea')).map(tier => tier.textContent)
localStorage.setItem('tier_names'+season, JSON.stringify(tier_names));
}
function SaveTierlistV2(){
console.log('tierlist saved')
let season = document.querySelector("#content .season_nav .on").textContent
let tierlist = {version:2}
tierlist.tiers = Array.from(document.querySelectorAll('.grid-container')[0].querySelectorAll('ul.droptrue')).map(tier => Array.from(tier.querySelectorAll('li')).map(anime => anime.id))
tierlist.tier_names = Array.from(document.querySelectorAll('ul div.textarea')).map(tier => tier.textContent)
localStorage.setItem(season, JSON.stringify(tierlist));
}
// anime count per season
let seasonal = document.querySelectorAll('.seasonal-anime-list:nth-child(1) .seasonal-anime'),
count = 0,
cours = 0
Array.from(seasonal).forEach(anime => {
let [episodes, duration] = Array.from(anime.querySelectorAll('.info .item:nth-child(2) span')).map(info => parseInt(info.textContent) ?? 0)
let members = anime.querySelector('.member').textContent
members = members.match(/[\d.]+/) * ( members.match(/M/) ? 1000000 : ( members.match(/K/) ? 1000 : 1 ) )
if(duration > 15 || members > 2000) count++
if(episodes > 10) cours += episodes/13
})
document.querySelectorAll('.anime-header')[0].innerText += ` (${count})`//+` (${cours.toFixed(0)})`
// buggy, zooms images
// https://www.geeksforgeeks.org/how-to-take-screenshot-of-a-div-using-javascript/
// download image button
// document.getElementById('download').addEventListener("click", function() {
// function download(canvas, filename) {
// const data = canvas.toDataURL("image/png;base64");
// const donwloadLink = document.querySelector("#download");
// donwloadLink.download = filename;
// donwloadLink.href = data;
// }
// html2canvas(document.querySelector(".grid-container"), {
// useCORS: true,
// onrendered: function (canvas) {
// document.body.appendChild(canvas);
// }}).then((canvas) => {
// // document.body.appendChild(canvas);
// download(canvas, "seasonal tierlist");
// });
// });
})();