pob.cool - Path of Building for browser environment

This is browser version of Path of Building.

Features

• Run the PoB in your browser, that's all.
• You can select the version of the PoB to run.
• Saved builds are stored in the browser's local storage.
  • The Cloud folder appears when you are logged into the site. Builds saved there are stored in the cloud and can be accessed from anywhere.
• You can load a build by specifying a hash in the URL.
  • eg. https://pob.cool/#build=https://pobb.in/WwTAYwulVav6

Limitations

• Network access is through our CORS proxy, so all users have the same source IP. This will likely cause rate limiting.
• For security reasons, requests containing the POESESSID cookie will be unconditionally rejected. Do not enter POESESSID in the PoB of this site.

Principle

• We will not make any changes to the original PoB. This is because a lot of effort has been put into the PoB itself and we want the community to focus on developing the offline version.
  • However, it does make changes in behavior that are possible without changing the code.

Development

Prerequisites

• Node 22
• Emscripten
• CMake
• Ninja

Install dependencies

npm ci

Run driver shell

Set up a development server for the PoB web driver alone.

npm run build -w packages/driver
npm run dev -w packages/driver

Run web app

Set up a web application development server. You need to build the driver first.

npm run dev -w packages/web

Under the hood

• Running the original PoB Lua code.
• Use a custom Lua 5.2 interpreter to run the code.
• Using Emscripten to compile the PoB engine to WebAssembly.
• A module equivalent to SimpleGraphic is written in C to bridge with the JS driver.
• The JS renderer renders using WebGL.
• packages/driver emulates PoB windows with vanilla JS.
• packages/web is the React application that uses the driver.