Example of mass deletion of telegram join messages in telegram web (https://web.telegram.org/a/)

script.js

const timeout = (ms) => new Promise(resolve => setTimeout(resolve, ms));
const randomInteger = (min, max) => Math.floor(Math.random() * (max - min + 1)) + min;
const contextMenuClick = (element) => element.dispatchEvent(new MouseEvent('contextmenu', {
    bubbles: true,
    cancelable: true,
    view: window,
}))
const messages = () => [...document.querySelectorAll('[id^=message].ActionMessage')]
            .filter(e => e.textContent.includes(' joined the group'));
const deleteMessage = async (e) => {
    contextMenuClick(e);
    await timeout(randomInteger(500,800));
    const deleteContextButton = document.querySelector('.MenuItem.destructive.compact')
    if (!deleteContextButton) return;
    deleteContextButton.click();
    await timeout(randomInteger(500,800));
    const deletePopupButton = document.querySelector('button.Button.confirm-dialog-button.default.danger.text')
    if (!deletePopupButton) return;
    deletePopupButton.click();
}

const wipeMessages = async () => {
    while(true) {
        const msgs = messages().reverse()
        for (obj of msgs) {
            await timeout(randomInteger(1000,1500))
            await deleteMessage(obj)
        }
    }
}

await wipeMessages()