# Prerequisites

There are a few prerequisites before you can start writing a Discord bot with Eris.

# System Prerequisites

• Have Node.js (14.x, recommended LTS) installed
• NPM 7.x.x (if not, run npm i -g npm)
• Yarn (optional, replaces npm i with yarn add. Run npm i -g yarn to install it)
• A web browser
  

If you don't have Node.js installed, head over here to check how to install it.

# Knowledge

We assume, of course, that you have a good knowledge of JavaScript and Node.js. If not, you can learn about JavaScript here:

• W3Schoolsopen in new window
• MDN's JavaScript Guideopen in new window
• Googleopen in new window

Take your pick, learn some JavaScript, and once you feel like you're confident enough to make a bot, come back and get started!