Đoạn script auto translate nho nhỏ viết bằng nodejs và puppeteer

a.txt

msgid "人間"
msgstr ""

msgid "人"
msgstr ""

msgid "男"
msgstr ""

msgid "男の人"
msgstr ""

msgid "男の子"
msgstr ""

msgid "女"
msgstr ""

msgid "女の人"
msgstr ""

msgid "女の子"
msgstr ""

msgid "赤ちゃん"
msgstr ""

msgid "若者"
msgstr ""

msgid "私"
msgstr ""

msgid "少女"
msgstr ""

msgid "少年"
msgstr ""

b.txt

msgid "人間"
msgstr ""

msgid "人"
msgstr ""

msgid "男"
msgstr ""

msgid "男の人"
msgstr ""

msgid "男の子"
msgstr ""

msgid "女"
msgstr ""

msgid "女の人"
msgstr ""

msgid "女の子"
msgstr ""

msgid "赤ちゃん"
msgstr ""

msgid "若者"
msgstr ""

msgid "私"
msgstr ""

msgid "少女"
msgstr ""

msgid "少年"
msgstr ""

index.js

const puppeteer = require('puppeteer');
const fs = require('fs');
const content = fs.readFileSync('./a.txt', 'utf8');

var lines = content.split('\n')
lines = lines.filter(function(item) {
    return item.startsWith('msgid');
});

lines = lines.map(function(item) {
    item  = item.trim();
    item = item.substring(0, item.length - 1);
    return item.replace('msgid "', '');
});


 
(async () => {
  const browser = await puppeteer.launch({headless: false});
  const page = await browser.newPage();
  await page.goto('https://translate.google.com/#view=home&op=translate&sl=ja&tl=en');


  for(var i = 0; i < lines.length; i++){
    const ele = lines[i]
    //   const textArea = await page.$('#source');
    //   const text = await page.evaluate(textArea => textArea.value, textArea);
    //   console.log(text)

    //await page.click('body > div.container > div.frame > div.page.tlid-homepage.homepage.translate-text > div.homepage-content-wrap > div.tlid-source-target.main-header > div.source-target-row > div.tlid-input.input.has-transliteration > div.source-wrap > div > div > div.source-header > div > div > div');
    const textArea = await page.$('#source');
    await page.evaluate(textArea => textArea.value = '', textArea);


    await page.focus('#source')
    await page.keyboard.type(ele)
    await page.waitFor(500);

    const rightSelector = 'body > div.container > div.frame > div.page.tlid-homepage.homepage.translate-text > div.homepage-content-wrap > div.tlid-source-target.main-header > div.source-target-row > div.tlid-results-container.results-container > div.tlid-result.result-dict-wrapper > div.result.tlid-copy-target > div.text-wrap.tlid-copy-target > div > span.tlid-translation.translation > span'
    await page.waitForSelector(rightSelector)
    const rightArea = await page.$(rightSelector);
    const rtext = await page.evaluate(rightArea => rightArea.textContent, rightArea);

    fs.writeFileSync('./b.txt', 'msgid "' + ele + '"\n', {'flag':'a'})
    fs.writeFileSync('./b.txt', 'msgstr "' + rtext + '"\n\n', {'flag':'a'})
    console.log(ele)
    console.log(rtext)
  }




  await browser.close();
})();

package.json

{
  "name": "abc",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "puppeteer": "^5.2.1"
  }
}