Puppetteer based nodejs scraper of https://zbranekvalitne.cz/zbrojni-prukaz/testove-otazky. Questions are not categorized by groups. Just all the questions.

zbranekvalitne-scraper.js

const puppeteer = require('puppeteer')
const fs = require('fs')

// this wrapper means immediatelly execute this code
void(async () => {
    const url = 'https://zbranekvalitne.cz/zbrojni-prukaz/testove-otazky'

    try {
        console.log("I am scraping questions from " + url)
        const browser = await puppeteer.launch({
            /*
            headless: false, // launch headful mode - good for debugging purposes (you will see what happened inside browser)
            slowMo: 250, // slow down puppeteer script so that it's easier to follow visually
            */
          })

        const page = await browser.newPage()

        // use nodejs console logging from inside of evaluate (where scraping script is running)
        page.on('console', consoleMessageObject => function (consoleMessageObject) {
            if (consoleMessageObject._type !== 'warning') {
                console.debug(consoleMessageObject._text)
            }
        });

        await page.goto(url)
        console.log("Browser opened, starting to evaluate scraping script...")

        const questions = await page.evaluate(() => {
            console.log("Evaluating scraping script")
            const questionsParentDiv = document.querySelectorAll('div#questions > div')          
            const questions = Array.from(questionsParentDiv).map((el, index) => {
                console.log(el)
                const rows = el.querySelectorAll('div.row')

                const questionText = rows[0].innerText.trim()

                const question = {
                    order: index,
                    question: {
                        text : questionText
                    },
                    answers: []                    
                }

                // answers 
                for (let i = 1; i < rows.length; i++) {
                    let answerRow = rows[i];

                    const isCorrect = answerRow.className.includes("correct-answer")
                    const rawAnswerText = answerRow.innerText
                    const answerText = rawAnswerText.replace(/^[a-z]\)/,"").trim()

                    question.answers.push({
                        answerText: answerText,
                        isCorrect: isCorrect
                    })

                }

                return question

            })

            return questions
        })

        await browser.close()        
        console.log("Scraping is done. Browser is closed. We scraped", questions.length, "questions")
        
        //questions.forEach(it => console.log(it))

        const fileUri = './questions.json'
        console.log("Writing questions to file:", fileUri)
        fs.writeFile(fileUri, JSON.stringify(questions), (err) => {
            if (err) {
                console.error("Cannot write file questions.json", err)
            } 

            console.info("File saved! Goodbye!")            
        })
              
    } catch (error) {
        console.error(error)
    }

})();