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Web application that allows you to get the counters of a specific League of Legends champion.
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Simple mobile friendly Angular app designed for League of Legends players to use during champion selection. It allows you to pick a champion, and to quickly get who counters them, according to the most updated champion data on the web.

try it here.

What It Looks Like

How It Works

In order to achieve great speed, the rendering of the champions counter data is done using a json file called data.json that is located within the project assets. However, we keep our data up to date by continuously running a python script that scrapes for new counter data. Here is how this is automated using AWS

Lambda Design



lol-scrapy is an AWS Lambda that executes a python script (you can find it in this repo as that does the scraping of the website for data. This Lambda connect with the lol-champ-select AWS S3 Bucket that hosts the production build of our Angular app, which allows the Lambda to directly update the data.json file used to display our champion counter data. In order to give you the most updated version of counter data (in case a new champion is out, the votes change, etc...), we use AWS CloudWatch Events to trigger this Lambda every 1 day.

Run Locally

Clone this Repository
git clone
Go to the cloned Repo cd LoL-champ-select
Install Dependencies npm install
Run npm start
On your browser, go to http://localhost:4200

Build & Deploy

Run sh to execute the deploy script which commits and pushes your changes to Github, creates a production build, and uploads the result to your S3 bucket.

Running Unit Tests

Run ng test to execute the unit tests via Karma.

Running e2e Tests

Run ng e2e to execute the end-to-end tests via Protractor.

Tools Used

  • Angular 8: Simple and fast front-end framework.
  • Python: Counter data was fetched from using
  • AWS: S3, Lambda, CloudWatch to allow the hosting of the app, and the updating of the data.






This project was generated with Angular CLI version 8.3.0.

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