When you open the site https://lmarena.ai/ goes to the "Direct Chat" tab makes the model selection blocks, the chat window and the query input block fixed above all other elements.
// ==UserScript==
// @name lmarena chat only
// @namespace Apache-2.0
// @version 1.5.3
// @description When you open the site https://lmarena.ai/ goes to the "Direct Chat" tab makes the model selection blocks, the chat window and the query input block fixed above all other elements.
// @author Tony 0tis
// @license Apache-2.0
// @match *://lmarena.ai/
// @icon https://lmarena.ai/favicon.ico
// @grant none
// ==/UserScript==
(function() {
'use strict';
if(localStorage.alertShown){
const originalAlert = window.alert;
window.alert = ()=>{};
setTimeout(()=>{
window.alert = originalAlert
}, 1000);
}
localStorage.alertShown = true;
class lmsysChat {
constructor(){
this.button = null;
this.tab = null;
this.mode = null;
this.timeouts = {};
console.log('start check');
this.setCss();
this.setMeta();
this.setObserver();
this.setManifest('https://raw.githubusercontent.com/tony-0tis/manifests/refs/heads/main/lmarena.ai/manifest.json');
}
setMeta(){
const meta = document.createElement('meta');
meta.name = 'viewport';
meta.content = 'width=device-width, initial-scale=1';
document.head.appendChild(meta);
}
setObserver(){
const observer = new MutationObserver((mutationsList, observer)=>{
for (const mutation of mutationsList) {
for(const node of mutation.addedNodes){
if(node.nodeName === 'BUTTON' && node.innerText.includes('Direct Chat')){
console.log('select chat');
this.riseChat(node);
}
}
}
});
observer.observe(document, {attributes: false, childList: true, characterData: false, subtree:true});
document.addEventListener('beforeunload', ()=>{
observer.disconnect();
});
}
async riseChat(button){
if(this.mode === 'tabs') {
return;
}
if(!button.classList.contains('selected')){
this.button = button;
button.dispatchEvent(new Event('click'));
await this._timeout(200);
}
const tab = document.querySelector(`#${button.getAttribute('aria-controls')}`);
if(!tab) return;
this.tab = tab;
this.mode = 'chat';
if(tab.classList.contains('directChat')) return;
tab.classList.add('directChat');
const inputComponent = this._find(tab, '[id="input_box"]', el=>el, true);
if(inputComponent && !inputComponent.classList.contains('directChatInput')){
inputComponent.classList.add('directChatInput');
const button = inputComponent.querySelector('button');
if(button && !button.classList.contains('directChatSend')){
button.classList.add('directChatSend');
}
}
const descriptionsComponent = this._find(tab, 'button', el=>el.innerText.includes('Expand to see the'), true);
if(descriptionsComponent && !descriptionsComponent.classList.contains('directChatDescriptions')){
descriptionsComponent.classList.add('directChatDescriptions');
}
const upvoteComponent = this._find(tab, 'button', el=>el.innerText.includes('Upvote'), true);
if(upvoteComponent && !upvoteComponent.classList.contains('directChatVotes')){
upvoteComponent.classList.add('directChatVotes');
}
const maxTokensComponent = this._find(tab, 'span', el=>el.innerText.includes('Max output tokens'), true);
if(maxTokensComponent){
[...maxTokensComponent.querySelectorAll('input')].forEach(el=>{
el.value = el.max || 4096;
});
}
const parametrs = this._find(tab, 'span', el=>el.innerText.includes('Parameters'));
if(parametrs){
parametrs.innerText += ' (Fine tuning)';
}
const selector = tab.querySelector('[role="listbox"]');
if(selector && !tab.querySelector('.chatModeSwitcher')){
const button = document.createElement('button');
button.classList.add('chatModeSwitcher');
button.addEventListener('click', e=>this._switchChatMode(e));
button.innerHTML = '🪟';
button.title = 'Switch fullscreen/tabs';
selector.parentNode.insertBefore(button, selector);
while(!tab.querySelector('.progress-text')){
await this._timeout(null, 'progress');
}
while(tab.querySelector('.progress-text')){
await this._timeout(null, 'progress');
}
let model = localStorage.getItem('lmsysChatModel');
if(model){
this.model = model;
if(model !== selector.value){
selector.dispatchEvent(new Event('focus'));
await this._timeout(50, 'progress');
const select = tab.querySelector(`[aria-label="${model}"]`);
if(select){
console.log('change selected model to', select.innerText);
select.dispatchEvent(new Event('mousedown', {bubbles: true}));
}
}
}
setInterval(()=>this._changeModel(selector), 500);
}
}
_switchChatMode(e){
if(!this.tab) return;
if(this.tab.classList.contains('directChat')){
this.mode = 'tabs';
this.tab.classList.remove('directChat');
document.querySelector('html').style.overflow = 'auto'
}
else{
this.mode = 'chat';
this.tab.classList.add('directChat');
document.querySelector('html').style.overflow = 'hidden';
}
}
_changeModel(selector){
if(!this.tab) return;
if(selector.value === this.model) return;
this.model = selector.value;
localStorage.setItem('lmsysChatModel', selector.value);
console.log('save selected model to:', selector.value);
}
_find(doc, where, filter, findParentComponent){
let el = [...doc.querySelectorAll(where)].filter(filter)[0];
if(el && findParentComponent){
let s = el.parentNode;
while(s){
if(s.id?.includes('component')){
break;
}
s = s.parentNode;
}
if(s) {
el = s;
}
}
return el;
}
_timeout(timeout = 200, name = 'default'){
clearTimeout(this.timeouts[name]);
return new Promise(resolve=>{
this.timeouts[name] = setTimeout(resolve, timeout);
});
}
setManifest(manifestUrl){
const manifest = document.createElement('link');
manifest.rel = 'manifest'
manifest.href = manifestUrl;
document.head.appendChild(manifest);
}
setCss(){
const css = document.createElement('style');
css.innerHTML = `
html{
overflow: hidden;
}
.directChat{
position: fixed !important;
left: 0;
right: 0;
bottom: 0;
top: 0;
z-index: 1000;
padding: 5px !important;
background: var(--body-background-fill);
}
.directChat>div{
gap: 7px !important;
height: 100%;
max-width: 900px;
margin: 0 auto;
}
.directChat>div>div:has(#chatbot){
height: calc(100% - 305px);
}
.directChat>div>div>div:has(#chatbot){
height: 100%;
}
.directChat #share-region-named, .directChat #share-region-named>div{
height: 100%;
}
.directChat #notice_markdown, .directChat #ack_markdown{
display: none;
}
.directChat .directChatSend{
min-width: 90px !important;
}
.directChat .options{
max-height: calc(100vh - 150px) !important;
}
.directChat .directChatDescriptions{
display: none;
}
.directChat .directChatVotes{
gap: 5px;
}
.directChat .directChatVotes>button{
min-width: auto;
padding: 5px;
line-height: 1;
}
.directChat .directChatInput{
gap: 5px;
}
.directChat #chatbot{
height: 100% !important;
}
.directChat #input_box{
padding: 0;
}
.chatModeSwitcher {
padding: 8px !important;
border-radius: 3px !important;
background: #f36812 !important;
margin: -6px 0 !important;
margin-left: -12px !important;
width: 55px !important;
margin-right: 10px !important;
}
.chatModeSwitcher:hover{
opacity: 0.8;
}
`;
document.head.appendChild(css);
}
}
new lmsysChat();
})();