Error returning values in multiple callback functions with electron

Question

I'm currently trying to grab a value from an electron-json-storage database and return it.

function getWithExpiry(key) {
    var grabbed = "";
    storage.has(key, function (error, hasKey){
        if (error) throw error;

        if (hasKey){
            storage.get(key, function (error, data){
                if (error) throw error  
                const item = JSON.parse(data)
                const now = new Date()

                if (now.getTime() > item.expiry) {
                    storage.remove(key, function (error) {
                        if (error) throw error
                        grabbed = null
                    })
                }else{
                    console.log(item.value)
                    grabbed = item.value
                }
            })
        }
    })
    console.log(grabbed)
    return grabbed;
}

I'm calling it with this:

setTimeout(async () => {
         var tokenpass = getWithExpiry('captcha')
         console.log(tokenpass)
         await page.evaluate((tokenpass) => {document.getElementById("g-recaptcha-response").innerText = `${tokenpass}`}, tokenpass)
         await page.click('input.button').then(console.log('Clicked'));

The console.logs return in a different order than called. First it returns "" from console.log(grabbed) in getWithExpiry(key), then "" from console.log(tokenpass), then console.log('Clicked'), then the expected value from console.log(item.value). I think the order of these console.logs might be the reason why getWithExpiry doesn't return item.value.

Community · Accepted Answer · 2020-06-20 09:12:55Z

1

Puppeteer

put await page.waitFor(1000); because the element takes some time to update, when you changed innterText

 async function getWithExpiry(key) {
  return new Promise((res, rej) => {
    storage.has(key, function (error, hasKey) {
      if (error) rej(error);

      if (hasKey) {
        storage.get(key, function (error, data) {
          if (error) rej(error);
          const item = JSON.parse(data);
          const now = new Date();

          if (now.getTime() > item.expiry) {
            storage.remove(key, function (error) {
              if (error) rej(error);
              res(null);
            });
          } else {
            console.log(item.value);
            res(item.value); 
          }
        });
      }
    });
  });
}

setTimeout(async () => {
  var tokenpass = await getWithExpiry("captcha");
  console.log(tokenpass);
  await page.evaluate((tokenpass) => {
    document.getElementById("g-recaptcha-response").innerText = `${tokenpass}`;
  }, tokenpass);

  await page.waitFor(1000);
  await page.click("input.button").then(console.log("Clicked"));
});

edited Jun 20, 2020 at 9:12

CommunityBot

11 silver badge

answered Jun 14, 2020 at 6:42

MUHAMMAD ILYAS

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1 Comment

nicholas Over a year ago

fixed order, but now console.log(tokenpass) is returning Promise {<resolved>: ""}. grabbed is still exiting the function as "" instead of item.value.

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