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Auto switch to chat for offline channels

Automaticaly switches to the chat view and closes the "Most Recent Video" and "Whatch now" popups when joining an offline channel.

// ==UserScript==
// @name         Auto switch to chat for offline channels
// @namespace    https://greasyfork.dpdns.org/scripts?set=586259
// @version      1.3.2
// @description  Automaticaly switches to the chat view and closes the "Most Recent Video" and "Whatch now" popups when joining an offline channel.
// @author       Sonyo
// @match        http*://www.twitch.tv/*
// @grant        none
// @license      MIT
// ==/UserScript==


function delay(milliseconds) {
    return new Promise(resolve => {
        setTimeout(resolve, milliseconds);
    });
}

async function getElement(selector) {
    var element = document.querySelector(selector);
    let count = 0;
    while (element === null) {
        await delay(1000);
        element = document.querySelector(selector);
        count++;
        if (count > 15) {
            return null;
        }
    }
    return element;
}

async function getNthElement(selector, n) {
    var elements = document.querySelectorAll(selector);
    let count = 0;
    while (elements.length === 0) {
        await delay(1000);
        elements = document.querySelectorAll(selector);
        count++;
        if (count > 15) {
            return null;
        }
    }
    if (elements.length >= n - 1)
        return elements[n];
    return null;
}

void async function () {
    'use strict';

    let prevUrl = undefined;
    setInterval(async () => {
        const currUrl = window.location.href;
        if (currUrl != prevUrl) {
            if (currUrl.includes(prevUrl)) // User switching to About or other page
                return;
            setup(prevUrl === undefined);
            prevUrl = currUrl;
        }
    }, 1000);
}();

async function setup(firstTime) {
    let button = await getNthElement(".cmTyEs", 4);
    if (button === null) // channel is online
        return;
    button.click();
    button = await getElement(".WDQCx");
    if (button === null) // no videos
        return;
    button.lastChild.click();
    button = await getElement(".cHbtnp");
    button.lastChild.click();
}
长期地址
遇到问题？请前往 GitHub 提 Issues，或加Q群1031348184。

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