Robots are all over the internet handling automated tasks. They can be helpful in many ways. But how do we create them?
Many developers had to learn Python to create one but the narrative has changed over the years. JavaScript developers can now create a bot in their own language using Puppeteer. In this tutorial, I will give a very easy introduction to creating a bot. 😊
We will be operating on GEO SEARCH website. Do leave a star on the github repo. Thank You 🤗.
Setting our project
- Create a folder and name it
js-bot-tutorial
mk dir js-bot-tutorial
cd js-bot-tutorial
- In the folder, create a file and name it
index.js
// Mac Users
touch index.js
// Windows Users
echo .>index.js
- Initialize the project. You can hit the
Enter
button for all the prompts
npm init
- Install puppeteer
npm i puppeteer
Creating our bot
Goto to your
index.js
- Require puppeteer like so:
const puppeteer = require("puppeteer");
- Create two variables (page and browser) and set them to null like so:
let page = null;
let browser = null;
- Launch a browser (by default it will launch chromium) and turn the headless off so that you can see what is going on
browser = puppeteer.launch({ headless: false })
To test if it is working, run node index
in your terminal
- Add a
then...catch...
block next like so:
.then( async (browser) => {
})
.catch((error) => {
console.log(error)
})
- In the
then
block, open a new tab with the following line
page = await browser.newPage();
- Set the browser
width
todesktop size only
and turn offmobile view
with the following line:
page.setViewport({
width: 1280,
height: 800,
isMobile: false,
});
- Launch the website that we will be using for this tutorial and wait until the network is good and the page is well loaded like so:
page.goto("https://eberegit.github.io/Geo-Search/index.html", {
waitUntil: "networkidle2",
});
We now want to search for a location by typing into the
search input
and clicking thesearch button
- Let's locate the
input
using theinspect element
To be able to target an element, we need to find a unique attribute. In this case, name
and class
attributes are unique. I will be using the name
attribute since it is more specific
- Wait for the
search input
to have finished loading on the page with the following line of code
await page.waitFor('input[name="search-field"]');
- Type the location you want to search after 2 seconds delay
await page.waitFor(2000);
await page.type('input[name="search-field"]', "Obudu Cattle Ranch, Obudu, Nigeria", {
delay: 5,
});
- Now, let's locate the
search button
and target it
I will also be targetting the button
with the name
attribute
- Target and click the button like so:
await page.click('input[name="submit-button"]');
This brings up the location on the map
- Finally, wait 5 seconds and shutdown the bot by closing the browser like so:
await page.waitFor(5000);
await browser.close();
This is my final code
const puppeteer = require("puppeteer");
// set variables
// handles the new tab or page where the website is/will be loaded
let page = null;
// handles the browser
let browser = null;
// Launch a browser and turn the headless off so that you can see what is going on
browser = puppeteer
.launch({ headless: false })
.then(async (browser) => {
// open a new tab in the browser
page = await browser.newPage();
// set device size to stick to only desktop view
page.setViewport({
width: 1280,
height: 800,
isMobile: false,
});
// open a URL
page.goto("https://eberegit.github.io/Geo-Search/index.html", {
waitUntil: "networkidle2",
});
// wait for the search input to have finished loading on the page
await page.waitFor('input[name="search-field"]');
// Delay 2seconds before typing
await page.waitFor(2000);
// target the search input and type into the field with a little delay so you can see whats going on
await page.type('input[name="search-field"]', "Obudu Cattle Ranch, Obudu, Nigeria", {
delay: 5,
});
// target and click the search button
await page.click('input[name="submit-button"]');
// wait 5 seconds
await page.waitFor(5000);
// close the browser
await browser.close();
})
.catch((error) => {
console.log(error);
});
Demo
Yaaaaaaeeeeeeyyyyyy... We did it!!! 💃🏻 🥳 🎈
Conclusion
I hope you enjoyed this tutorial as much as I did while preparing it.
All codes can be found here
EBEREGIT / js-bot-tutorial
This tutorial teaches us how to create a simple bot in JavaScript with the help of Puppeteer.
There will be more on this coming soon as I plan to launch a twitter bot soon.
If you have have questions or comments, I will love to see them in the comment section
See you soon...
Top comments (3)
Hi please I have question . I try to create bot to login into my account yahoo but then I type the username and type enter. the site go to other URL then I can't to type password
I am not very sure what’s going on there but it seems like you need to understand how the website works normally first
Then you will program the bot properly
Can this bot be created using proxy and clicking advert on website. if yes how plz?