index.js

const puppeteer = require("puppeteer");
// command: pm2 --output out.log --error err.log --max-memory-restart 100M --max-restarts 5 start index.js

(async () => {
	const browser = await puppeteer.launch({
		product: "chrome",
		headless: false,
		defaultViewport: null,
		args: ["--use-fake-ui-for-media-stream"],
	});

	const page = await browser.newPage();
	await page.goto("https://teams.microsoft.com");

	await page.waitForSelector("input.form-control.input.ext-input.text-box.ext-text-box[type='email']");
	await page.type(
		"input.form-control.input.ext-input.text-box.ext-text-box[type='email']",
		"YOUR-USER-NAME-OR-EMAIL-ID",
		{
			delay: 50,
		}
	);

	await page.waitForSelector("input.button.ext-button.primary.ext-primary[type='submit'][value='Next']");
	await page.click("input.button.ext-button.primary.ext-primary[type='submit'][value='Next']");

	await page.waitForSelector("input.form-control.input.ext-input.text-box.ext-text-box[type='password']");
	await page.type(
		"input.form-control.input.ext-input.text-box.ext-text-box[type='password']",
		"YOUR-LOGIN-CREDENTIAL",
		{
			delay: 50,
		}
	);

	await page.waitForSelector("input.button.ext-button.primary.ext-primary[type='submit'][value='#']");
	await page.click("input.button.ext-button.primary.ext-primary[type='submit'][value='#']");

	await page.waitForSelector("input.button.ext-button.secondary.ext-secondary[type='button'][value='No']");
	await page.click("input.button.ext-button.secondary.ext-secondary[type='button'][value='No']");

	await page.waitForSelector("a.use-app-lnk[href='#']");
	await page.click("a.use-app-lnk[href='#']");

	await page.waitForSelector("a[data-tid='team-Bot Test']");
	await page.click("a[data-tid='team-Bot Test']");

	await page.waitForTimeout(5000);

	const xpath = `//div[contains(@class, "ts-meeting-message")]/div[contains(@title, "Click to see details of this meeting")]/div[contains(@class, "title")]/span[text()="Regular Meeting Name"]/../../..`;
	await page.waitForXPath(xpath);
	const [meetingElem] = await page.$x(xpath);
	await meetingElem.click();

	await page.waitForSelector("button.ms-Button.ms-Button--primary.root-88[type='button'][aria-label='Join meeting']");
	await page.click("button.ms-Button.ms-Button--primary.root-88[type='button'][aria-label='Join meeting']");

	try {
		await page.waitForSelector("button.ts-toggle-button[track-summary='Toggle camera OFF in meeting pre join screen']");
		await page.click("button.ts-toggle-button[track-summary='Toggle camera OFF in meeting pre join screen']");

		await page.waitForSelector(
			"button.ts-toggle-button[track-summary='Toggle microphone OFF in meeting pre join screen']"
		);
		await page.click("button.ts-toggle-button[track-summary='Toggle microphone OFF in meeting pre join screen']");
	} catch (e) {
		//TODO: handle case where audio/video could not be turned off
	}

	await page.waitForSelector("button.join-btn.ts-btn.inset-border.ts-btn-primary[data-tid='prejoin-join-button']");
	await page.click("button.join-btn.ts-btn.inset-border.ts-btn-primary[data-tid='prejoin-join-button']");
})();