Extensions libraries

This mono-repository contains a collection of TypeScript libraries which are used in AdGuard browser extensions and other projects.

Packages

The following packages are available in this repository:

Package Name	Description
css-tokenizer	A fast, spec-compliant CSS tokenizer for standard and Extended CSS.
agtree	Universal adblock filter list parser which produces a detailed AST.
tsurlfilter	A library that enforces AdGuard's blocking rules logic.
tswebextension	Wraps the web extension API for use with tsurlfilter.
adguard-api	Manages filter lists and ad filtering via tswebextension.
adguard-api-mv3	MV3 compatible version of adguard-api.
dnr-rulesets	Utility to load prebuilt AdGuard DNR rulesets for mv3 extensions.
examples/manifest-v2	Example using Manifest V2.
examples/manifest-v3	Example using Manifest V3.
examples/tswebextension-example	Example for tswebextension.
examples/tswebextension-mv3	Example for tswebextension using Manifest V3.

Detailed information on each package is available in the ./packages directory.

Development

Prerequisites

Ensure that the following software is installed on your computer:

• Node.js: v22 (you can install multiple versions using nvm)
• pnpm: v10
• Git

Note

For development, our team uses macOS and Linux. It may be possible that some commands not work on Windows, so if you are using Windows, we recommend using WSL or a virtual machine.

Environment Setup

Install dependencies with pnpm: pnpm install.

Note

If you want to use another linked packages in monorepo workspace, link it in root folder.

This repository uses pnpm workspaces and Lerna to manage multiple packages in a single repository.

Development Commands

• Runs tests in all packages: npx lerna run test
• Lint all packages: pnpm lint
• Remove node_modules from all packages and root package: pnpm clean
• Builds the packages in the current repo: npx lerna run build
• Builds a specific package: npx lerna run build --scope=<package-name>
  • For example, to build the tswebextension package: npx lerna run build --scope=@adguard/tswebextension. This command also builds @adguard/tsurlfilter first as it is required for @adguard/tswebextension.

Note

You can find Lerna commands in the following link: Lerna Commands.

Linking packages from this monorepo to other projects

When linking packages from this monorepo to projects that don't use pnpm, you need to be careful about package hoisting. pnpm uses a nested node_modules structure by default, which may not be compatible with other package managers that use flat structures.

If you need to link packages to a non-pnpm environment, you can force pnpm to use a flat structure by using the --shamefully-hoist flag when installing dependencies:

pnpm install --shamefully-hoist

For projects using pnpm, you can use pnpm link to connect the packages locally. For more details, please check the pnpm documentation.

Notice about zod package versions

Within this monorepo, zod is utilized for data validation. There are instances where a zod schema is exported from one package for use in another. However, this can potentially lead to issues if the zod versions across these packages differ. For more context, refer to this issue. To prevent this problem, it is required to maintain uniformity by using the same zod version across all packages in the monorepo.

Sample extensions

Source code of sample extensions can be found in ./packages/examples directory.

You can build them using the following commands:

• MV2 sample extension: npx lerna run build --scope tswebextension-mv2
• MV3 sample extension: npx lerna run build --scope tswebextension-mv3
• AdGuard API example: npx lerna run build --scope adguard-api-example

To test if this extension works correctly you can use the following test pages:

Test pages:

• Simple rules test
• Script rules test

VSCode Workspace

If you're using Visual Studio Code for development, it may be easier to work with the monorepo if you use the workspace functionality. To do this, create a tsurlfilter.code-workspace file in the monorepo root directory.

{
    "folders": [
        { "path": "packages/tsurlfilter" },
        { "path": "packages/tswebextension" },
        { "path": "packages/agtree" },
        { "path": "packages/css-tokenizer" },
        { "path": "packages/adguard-api" },
        { "path": "packages/examples/adguard-api" },
        { "path": "packages/examples/tswebextension-mv2" },
        { "path": "packages/examples/tswebextension-mv3" }
    ]
}