This script automatically refreshes a given webpage at specified intervals using Puppeteer. It is designed to monitor changes on a webpage over time. This version includes better error handling and resource management to ensure the script runs efficiently.

puppeteer-auto-reloader.js

/**
 * @file This script automatically refreshes a given webpage at specified intervals using Puppeteer.
 * It is designed to monitor changes on a webpage over time. This version includes better error handling
 * and resource management to ensure the script runs efficiently.
 */

const puppeteer = require('puppeteer');

let browser;
const refreshUrl = 'https://profile-counter.glitch.me/montasim/count.svg';

/**
 * Initializes Puppeteer browser if not already initialized.
 */
const initBrowser = async () => {
    if (!browser) {
        browser = await puppeteer.launch();
    }
};

/**
 * Automatically refreshes the specified URL at the given interval. This function uses `setTimeout`
 * instead of `setInterval` to avoid overlaps of refresh cycles.
 *
 * @param {string} url - The URL of the page to refresh.
 * @param {number} interval - The interval in milliseconds at which the page should be refreshed.
 */
const autoRefresh = async (url, interval) => {
    await initBrowser();
    const page = await browser.newPage();

    const refreshPage = async () => {
        try {
            await page.goto(url);
            console.log('Page refreshed');
            setTimeout(refreshPage, interval); // Schedule the next refresh
        } catch (error) {
            console.error('Failed to refresh page:', error);
            await page.close();
        }
    };

    refreshPage();
};

// Example usage: Refresh a URL every 5 seconds.
autoRefresh(refreshUrl, 5000);

/**
 * Gracefully close the browser when the process exits.
 */
process.on('exit', () => {
    if (browser) {
        console.log('Closing browser');
        browser.close();
    }
});