A freerice bot written in Javascript using puppeteer

Freerice.js

#!/usr/bin/env node

const puppeteer = require("puppeteer");

function parse_args(args){
    let headless = false;
    let proxy = null
    while (args.length != 0){
        switch (args[0]) {
            case '--headless':
                headless = true;
                console.log("Running in headless mode");
                args.shift();
                break;
            case '--proxy':
                proxy = args[1];
                console.log("Proxy: ", args[1]);
                args.shift();
                args.shift();
                break;
            default:
                if (args[0].includes("node") | args[0].includes('.js')) {
                    args.shift();
                    break;
                }
                else {
                    console.log("Unrecognized argument: ", args[0]);
                    args.shift();
                    break;
                }
        }
    }
    return {headless: headless, proxy: proxy}
}

function random_css_selector(){
    let css_selectors = [];
    for (let i = 2; i < 6; i++) {
        css_selectors.push(`div.card-button:nth-child(${i})`)
    };
    let css_selector = css_selectors[Math.floor(Math.random() * css_selectors.length)];
    return css_selector;
}

async function freerice(headless, proxy) {
    let browser = null;
    if (proxy){
        browser = await puppeteer.launch({headless: headless, args: [ `--proxy-server=http://${proxy}`]});
    }
    else{
        browser = await puppeteer.launch({headless: headless});
    }
    let page = await browser.newPage();
    await page.goto("https://freerice.com");
    await page.waitFor(5 * 1000);
    await page.evaluate(() => {
        document.querySelector(".as-oil__btn-optin").click();
    });
    while (true){
        let css_selector = random_css_selector()
        points = await page.evaluate((css_selector) => {
            // let css_selector = random_css_selector();
            document.querySelector(css_selector).click();
            return document.querySelector('.rice-counter__value > span:nth-child(1)').textContent
        }, css_selector);
        process.stdout.write(`Points: ${points}`);
        await page.waitFor(2000);
        process.stdout.clearLine();
        process.stdout.cursorTo(0);

    };
};

(async () => {
  let args = parse_args(process.argv);
  await freerice(args.headless, args.proxy)
})()