Enter the specified text in the input field

Question

Enter the specified text in the input field

My challenge involves dynamically changing a string value that needs to be inserted into an input field.

(async () => {
  let index = 1004327;

  let browser = await puppeteer.launch({
    headless: true,
  });

  let page = await browser.newPage();
    
  while (1) {
      await page.goto(`${link}${index}`);
      page.setDefaultTimeout(0);
      let html = await page.evaluate(async () => {
        let data = document.getElementById(
          "ctl00_phWorkZone_DbLabel8"
        ).innerText;
        let object = {
          information: data,
          location: window.location.href,
        };
        return object;
      });
      if (Object.values(html)[0]) {
        await staff.type(
          "textarea[name=email]",
          Object.values(html).join("\n"),
          {
            delay: 0,
          }
        );
        console.log(index);
        index++;
        staff.click("input[name=save]", { delay: 0 });
      }
  }
})();

I have utilized the .type() function, although it works, I am searching for a more efficient solution.

javascript puppeteer

Answer 1

Answer №1

The .type() method is perfect for simulating human typing when filling in an input field. However, for a quicker solution, consider using the .keyboard.sendCharacter() method instead (check the <a href="https://pptr.dev/api/puppeteer.keyboard.sendcharacter" rel="nofollow noreferrer">source</a> for more details). This method allows you to instantly fill in the input without having to type each character.</p>
<p>Here's an example of how to use it:</p>
<pre><code>const puppeteer=require('puppeteer');
const browser=await puppeteer.launch({ headless: false });

const page=await browser.newPage()
await page.goto("https://stackoverflow.com/q/75395199/12715723")

let input=await page.$('input[name="q"]');
await input.click();
await page.keyboard.sendCharacter('test');

Answer 2

The .type() method is perfect for simulating human typing when filling in an input field. However, for a quicker solution, consider using the .keyboard.sendCharacter() method instead (check the <a href="https://pptr.dev/api/puppeteer.keyboard.sendcharacter" rel="nofollow noreferrer">source</a> for more details). This method allows you to instantly fill in the input without having to type each character.</p>
<p>Here's an example of how to use it:</p>
<pre><code>const puppeteer=require('puppeteer');
const browser=await puppeteer.launch({ headless: false });

const page=await browser.newPage()
await page.goto("https://stackoverflow.com/q/75395199/12715723")

let input=await page.$('input[name="q"]');
await input.click();
await page.keyboard.sendCharacter('test');

Answer 3

Answer №2

Understanding how the input operates on the page can be tricky due to authentication requirements. However, depending on how the website detects changes in the element, you might be able to manipulate the value using JavaScript in the browser:

staff.$eval(
  'textarea[name="mail_address"]',
  (el, value) => el.value = value,
  evalObject.values(html).join("\n")
);

Here is a simple example that you can run:

const puppeteer = require("puppeteer"); // ^19.6.3

const html = `<!DOCTYPE html><html><body>
<textarea name="mail_address"></textarea></body></html>`;

let browser;
(async () => {
  browser = await puppeteer.launch();
  const [page] = await browser.pages();
  await page.setContent(html);
  const sel = 'textarea[name="mail_address"]';
  await page.$eval(
    sel,
    (el, value) => el.value = value,
    "testing"
  );
  console.log(await page.$eval(sel, el => el.value)); // => testing
})()
  .catch(err => console.error(err))
  .finally(() => browser?.close());

If this approach does not yield results, consider simulating a change event on the element with Puppeteer keyboard actions or manually through a browser JS event. Another option is to use keyboard.sendCharacter while the element has focus, as demonstrated in this response:

await page.focus(selector);
await page.keyboard.sendCharacter("foobar");

It's worth noting that setting .setDefaultTimeout(0); in your original code can lead to potential hanging issues without error raising. Additionally, remember to use await with staff.click and page.authenticate calls since they return promises, as explained in this resource.

Answer 4

Understanding how the input operates on the page can be tricky due to authentication requirements. However, depending on how the website detects changes in the element, you might be able to manipulate the value using JavaScript in the browser:

staff.$eval(
  'textarea[name="mail_address"]',
  (el, value) => el.value = value,
  evalObject.values(html).join("\n")
);

Here is a simple example that you can run:

const puppeteer = require("puppeteer"); // ^19.6.3

const html = `<!DOCTYPE html><html><body>
<textarea name="mail_address"></textarea></body></html>`;

let browser;
(async () => {
  browser = await puppeteer.launch();
  const [page] = await browser.pages();
  await page.setContent(html);
  const sel = 'textarea[name="mail_address"]';
  await page.$eval(
    sel,
    (el, value) => el.value = value,
    "testing"
  );
  console.log(await page.$eval(sel, el => el.value)); // => testing
})()
  .catch(err => console.error(err))
  .finally(() => browser?.close());

If this approach does not yield results, consider simulating a change event on the element with Puppeteer keyboard actions or manually through a browser JS event. Another option is to use keyboard.sendCharacter while the element has focus, as demonstrated in this response:

await page.focus(selector);
await page.keyboard.sendCharacter("foobar");

It's worth noting that setting .setDefaultTimeout(0); in your original code can lead to potential hanging issues without error raising. Additionally, remember to use await with staff.click and page.authenticate calls since they return promises, as explained in this resource.

Enter the specified text in the input field

Answer №1

Answer №2

Similar questions

`Encountering an unknown index while using AJAX to retrieve data from a PHP file

Steps for Downloading an Image from Google

Error encountered while using AngularJS and Node.js with the 'phantom' node module. The application is throwing an injection error as AngularJS attempts to load a directive with a suffix

What advantages do constant variables offer when selecting DOM elements?

Utilizing jQuery to execute functions from various files simultaneously with a single load statement

The highest and lowest points of the visible image within a transparent PNG file

VueJs: Passing the value of a 'computed function' from a child component to its parent component using $emit with an optional payload and $on

HTML5 video player with secondary playlist

Adjusting the size of MUI StaticDatePicker

Converting Strings into Variable Names in Vue.js: A Step-by-Step Guide

Delete a class that is not identified by the DOM

Creating immersive visualizations using Three.js and WebGL, as well as leveraging 2D canvas for rendering graphics, involves passing the getImageData

JQuery Ajax call fails to retrieve any information

Javascript recursive function calling itself

Make a JSONP request with the MIME Type set to text/plain

Marked checkboxes and Node.js

The data contained in the Response is an extensive script instead of the intended JSON object

Tips for synchronizing with animation completion in ui-router's $stateChangeStart event

Assign a specific function to every element within a collection of JSON entities

Create an interactive Angular form that dynamically generates groups of form elements based on data pulled from