Screenshots location while running the puppeteer script - node.js

Question

I have created a Puppeteer script to run in offline, I have got the below code to take the screenshot. While running the offline-login-check.js script from the command prompt, could some one please advise where the screen shots are added ?
const puppeteer = require("puppeteer");
(async() => {
const browser = await puppeteer.launch({
headless: true,
chromeWebSecurity: false,
args: ['--no-sandbox']
});
try {
// Create a new page
const page = await browser.newPage()
// Connect to Chrome DevTools
const client = await page.target().createCDPSession()
// Navigate and take a screenshot
await page.waitFor(3000);
await page.goto('https://sometestsite.net/home',{waitUntil: 'networkidle0'})
//await page.goto(url, {waitUntil: 'networkidle0'});
await page.evaluate('navigator.serviceWorker.ready');
console.log('Going offline');
await page.setOfflineMode(true);
// Does === true for the main page but the fallback content isn't being served.
page.on('response', r => console.log(r.fromServiceWorker()));
await page.reload({waitUntil: 'networkidle0'});
await page.waitFor(5000);
await page.screenshot({path: 'screenshot.png',fullPage: true})
await page.waitForSelector('mat-card[id="route-tile-card]');
await page.click('mat-card[id="route-tile-card]');
await page.waitFor(3000);
} catch(e) {
// handle initialization error
console.log ("Timeout or other error: ", e)
}
await browser.close();
})();

Answer 1

const puppeteer = require('puppeteer');
(async() => {
const browser = await puppeteer.launch({
headless: false,
chromeWebSecurity: false,
args: ['--no-sandbox']
});
try {
// Create a new page
const page = await browser.newPage();
// Connect to Chrome DevTools
const client = await page.target().createCDPSession();
// Navigate and take a screenshot
await page.goto('https://example.com', {waitUntil: 'networkidle0'});
// await page.evaluate('navigator.serviceWorker.ready');
console.log('Going offline');
await page.setOfflineMode(true);
// Does === true for the main page but the fallback content isn't being served.
page.on('response', r => console.log(r.fromServiceWorker()));
await page.reload({waitUntil: 'networkidle0'});
await page.screenshot({path: 'screenshot2.png',fullPage: true})
// await page.waitForSelector('mat-card[id="route-tile-card]');
// await page.click('mat-card[id="route-tile-card]');
} catch(e) {
// handle initialization error
console.log ("Timeout or other error: ", e)
}
await browser.close();
})();
then in command line run ls | GREP .png and you should see screenshot there. Be aware i take rid of await page.evaluate('navigator.serviceWorker.ready'); which might be specified to your website

Answer 2

Your script is perfect. There is no problem with it!
The screenshot.png should be on the directory that you run the node offline-login-check.js command.
If its not there, maybe you are getting some error/timeout before the page.screenshot command runs. Since your script is ok, this can be caused by network issues or issues with the page. For example, if your page has a never ending connection (like WebSocket), change the "networkidle0" to "networkidle2" or "load", otherwise the first page.goto will get stuck.
Again, your script is perfect. You don't have to change it.