puppeteer use headless browser to capture screenshot

myScreenshot.js

/*
Usage:
```
$ mkdir myscreenshot
$ cd myscreenshot
$ npm i puppeteer --save
$ 
$ vim myScreenshot.js
const puppeteer = require('puppeteer');
...

~
:wq
$ node myScreenshot.js
...
$ catimg myscreenshot.png  # https://github.com/posva/catimg.git
```
*/

const puppeteer = require('puppeteer');

function timeout(ms) {
    return new Promise(resolve => setTimeout(resolve, ms));
};

(async() => {
    const browser = await puppeteer.launch({
        args: ['--no-sandbox'],  // https://stackoverflow.com/a/51038064/8991693
    });
    const page = await browser.newPage();
    await page.setViewport({width: 800, height: 600})
    await page.goto('http://localhost:5173');
    await timeout(1000)
    await page.screenshot({path: 'myscreenshot.png'});
    browser.close();
})();