@tabula/forge

The bundler for packages for Node.js and browser with support of various tools.

Details

This bundler is wrapper around esbuild with various plugins.

The forge doesn't allow to configure details of bundling, and expects predefined project structure.

Installation

Use the package manager pnpm to install @tabula/forge.

pnpm add @tabula/forge --save-dev

You can use npm or yarn too.

Common

The forge has a few moments which should be highlighted:

• looking for sources in the <packageRoot>/src directory;
• produces output to the <packageRoot>/lib directory;
• produces typings to the <packageRoot>/typings directory;
• uses ESM format for produced module;
• doesn't bundle dependencies;
• generates source maps which include sources content.

Commands

init

Create an initial file for the selected target.

Usage

forge init -t,--target browser|node

Options

• -t,--target - defines target for which a config will be generated.

build

Build a package.

Usage

forge [build] <-t,--target browser|node> [-e,--entry <in>[:<out>]] [-p,--production] [-c,--check] [-t,--typings] [-s,--storybook] [-b,--post-build <command>[:<cwd>]] [-w,--watch]

Options

• -t, --target - defines which platform is target for build. Must be browser or node. This option is required, if not defined in the configuration file.
• -e, --entry - (default: index) defines an entry point. Can be used multiple times to define multiple entry points.
• -p, --production - (default: true for build and false for watch) enables bundling for production environment. Build for production mode doesn't enable minification for debug purposes in the target user application.
• -c, --check - (default: true) enables types checking through TypeScript compiler running. It stops build if any type error has been found.
• -t, --typings - (default: true) enables typings generation. It generates typings only if type checking is enabled.
• -s, --storybook - (default: false for build and true for watch) enables emitting additional meta for Storybook. It uses react-docgen under the hood. This option is useful only for the browser target.
• -h,--css-class-prefix - (default: true) option defines usage of prefix for CSS classes which generates by the CSS modules and vanilla-extract in production mode. It can be string in special format or boolean.
• -b, --post-build - defines post build hook. A hook is an external command, which executed in a shell. Can be used multiple times to define multiple post build hooks.
• -w, --watch - (default: false) enables watch mode.

Configuration file

You can use configuration file. We're looking for:

• a forge property in the package.json;
• a JSON or YAML .forgerc file;
• an .forgerc file with .json, .yaml, .yml, .js, .mjs or .cjs
• any of the above two inside a .config subdirectory;
• a forge.config.js, forge.config.mjs, or forge.config.cjs file.

Example

{
  "$schema": "https://github.com/ReTable/forge/blob/main/schemas/forgerc.json",

  "target": "node",

  "entry": "index",

  "check": true,
  "typings": true,
  "cssClassPrefix": true,

  "postBuild": "touch lib/meta.js",

  "build": {
    "production": true
  },

  "watch": {
    "production": false,
    "storybook": true
  }
}

Entry format

You can use one of following entry formats:

• "<input>"

• "<input>:<output>"

• {
    "in": "<input>"
  }

• {
    "in": "<input>",
    "out": "<output>"
  }

Entries

You can define one or more entries:

{
  "entry": // <entry>
}

or

{
  entries: [
    // <entry>
    // <entry>
    // ...
  ],
}

Hooks format

You can use one of following hook formats:

• "<command>"

• "<command>:<cwd>"

• {
    "command": "<command>"
  }

• {
    "command": "<command>",
    "cwd": "<cwd>"
  }

Options resolving

We resolve option in following order:

• an option provided through CLI;
• command specific option from the config (build or watch properties);
• option from the config file;
• default value.

Schema

You can look at the JSON Schema for configuration file.

Not all options are available through static files. For example, svgrComponentName is available only in JS/TS files.

Entries

By default, the forge looking for <packageRoot>/src/index.tsx or <packageRoot/src/index.ts file, and bundles it to the <packageRoot>/lib/index.js.

You can provide entry in two possible variants:

• only input: <input>;
• input and output: <input>:<output>.

Input resolving

All input files will be searched in the <packageRoot>/src directory.

If you provide input as file name, then it will be searched exactly.

For example the following command:

$ forge build node --entry nodes/entry.ts

The forge will use <packageRoot>/src/nodes/entry.ts as an entry file.

But you can provide module name instead of file.

Look at the next command:

$ forge build node --entry nodes/entry

In that case, the forge will looking for an entry file in the following order:

• <packageRoot>/src/nodes/entry.tsx;
• <packageRoot>/src/nodes/entry.ts;
• <packageRoot>/src/nodes/entry/index.tsx;
• <packageRoot>/src/nodes/entry/index.ts.

Output resolving

By default, we use relative path of entry module as output path. For example:

• when input is nodes/entry, then bundle will be <packageRoot>/lib/nodes/entry.js (for example, an entry file may be <packageRoot>/nodes/entry.ts or <packageRoot>/nodes/entry/index.ts);
• when input is nodes/index.ts, then bundle will be <packageRoot>/lib/nodes/index.js.

But you can define your own path for bundle. For example:

forge build node --entry nodes/entry:bundles/nodes

This command creates a bundle <packageRoot>/lib/bundles/nodes.js.

NOTE: Don't use .js extension for output module, because we add it by default before transfer parameters to the esbuild. But even if you add the extension, we will fix it and your bundle will haven't doubled .js extension anyway.

Code splitting

We use code splitting feature of the esbuild. If you have multiple entries which share the same code, bundler will create ESM modules with shared code, and will use it in the bundles.

Code splitting and CSS

Be carefully when use code splitting and CSS. Constants which extracted from CSS modules or vanilla-extract styles will be shared. But, extracted CSS from shared modules will be duplicated for each bundle.

All hashed class names will be the same between all modules which use them.

Hooks

You can run scripts after each build.

For example:

forge -b "touch lib/meta.js" -b "touch meta.d.ts":"typings"

The two commands will be executed after build. The first one will use <packageRoot> as working directory. And the second one will use <packageRoot>/typings as working directory.

Node.js

The only one moment which you should know about bundling for Node.js that we use version 18 as target.

Browser

Bundling for browser has a much more implementation details.

Assets

We support bundling of images and fonts. But we don't inline it, and not change names or assets structure like a Vite or Webpack.

We only solve a task to bundle package for using in projects which will be bundled for serving later.

CSS

The CSS supported out of the box.

If your package uses CSS then a line import "./index.css"; automatically will be added to the beginning of a lib/index.js file.

Also, all CSS are processed by the Autoprefixer.

CSS Modules

We support CSS Modules with predefined settings:

• use camelCaseOnly locals convention;
• different scoped names are generated for development and production modes;
• package name and file path are used in scoped name for debug purposes in development mode.

Style files which use CSS Modules must have *.module.[ext] filename.

CSS Preprocessors

The forge supports usage of the PostCSS and Sass.

You should use *.pcss extension for PostCSS and *.scss for the Sass.

Sass Imports

We support imports in format of ~<pkg>. It's similar to the Webpack, but has own restrictions.

The forge doesn't support paths inside the package. It does search the package.json of the given package, and try to read sass field inside of it.

Example:

{
  "name": "@tabula/ui-theme",
  "sass": "./sass/index.scss"
}

will be resolved to the <node_modules>/@tabula/ui-theme/sass/index.scss.

vanilla-extract

We support the vanilla-extract.

This is zero-runtime CSS-in-JS solution with TypeScript support.

IMPORTANT: All imports of CSS files in *.css.ts files is ignored.

SVGR

We support the SVGR to allow to use SVG images not only as loadable assets, but also as a React components.

import iconUrl, { ReactComponent as IconUrl } from './icon.svg';

<>
  <IconUrl className="react-icon" />
  <img className="img-icon" src={iconUrl} />
</>;

An SVG file already exports React component as ReactComponent.

SVGR Component Name

By default, SVGR uses Svg<CamelCaseFileName> name for components. You can override this behaviour through svgrComponentName option, which should be function of format (svgrName: string) => string.

Example:

export default {
  // ...
  svgrComponentName(name) {
    return `Ui${name.slice(3)}Icon`;
  },
  // ...
};

If you have a file column.svg then component name is SvgColumn by default. But with config from about the name will be UiColumnIcon.

If you use memoization it looks like:

import { memo } from 'react';

const UiColumnIcon = (props) => {
  // ...
};

const Memo = memo(UiColumnIcon);

export { Memo as ReactComponent };

This option doesn't affect named exports.

SVGR Display Name

By default, SVGR doesn't append displayName for exported components. You can add this behaviour through svgrDisplayName option, which should be function of format (componentName: string) => string | { displayName: string; isDebugOnly?: boolean }.

When function is returns string, then isDebugOnly equals to false.

The componentName is name of component itself (before memoization if enabled). If you provide svgrComponentName option, then result of applying this function is componentName.

The isDebugOnly enables wrapping the assignment in Vite compatible condition.

// `isDebugOnly` = false

Component.displayName = 'scope(ComponentDisplayName)';

// `isDebugOnly` = true

if (import.meta.env.DEV) {
  Component.displayName = `scope(ComponentDisplayName)`;
}

If memoization is enabled, then the displayName will be assigned to the memoized component:

const Component = (props) => {
  // ...
};

const Memo = memo(Component);

Memo.displayName = `scope(ComponentDisplayName)`;

React

We use automatic runtime only for React.

For more details, see here.

This feature is supported by the esbuild already.

Storybook

We generate additional documentation for Storybook:

AwesomeComponent.__docgenInfo = { ...componentDocumentation };

TypeScript

The forge supports TypeScript. It runs tsc before each build automatically.

You should provide tsconfig.forge.json in your project which will be used by the forge.

You can use @tabula/typescript-config for Node.js:

{
  "extends": "@tabula/typescript-config/tsconfig.node.json",

  "include": ["src/**/*"]
}

or browser:

{
  "extends": "@tabula/typescript-config/tsconfig.browser.json",

  "include": ["src/**/*"]
}

The configuration for browser also includes typings for CSS and CSS Modules, static files and SVG files with SVGR support.

That configs are recommended for usage with the forge.

CSS Class Prefix

The forge supports option cssClassPrefix which used in production for browser builds. It enables adding prefix to the classes which generated by the CSS Modules and vanilla-extract.

The option can be boolean or string.

If string option is used, then it will be used as simple template with following placeholders:

• [full-name] - full package name (with scope if it presented);
• [scope] - package scope if presented or an empty string;
• [name] - package name without scope.

The prefix has format [full-name]__ by default or when option is true.

When package name is awesome-ui, then:

• when the option is [full-name]__, then the prefix is awesome_ui__;
• when the option is [scope]__, then the prefix is __;
• when the option is [scope]__[name]__, then the prefix is __awesome_ui__.

When package name is @awesome-ui/theme, then:

• when the option is [full-name]__, then the prefix is awesome_ui_theme_;
• when the option is [scope]__, then the prefix is awesome_ui__;
• when the option is [scope]__[name]__, then the prefix is awesome_ui__theme__.

License

This project is ISC licensed.