tsconfig-paths-webpack-plugin
Load modules according to tsconfig paths in webpack.
Last updated a year ago by jonaskello .
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tsconfig-paths-webpack-plugin

npm version code style: prettier MIT license

Use this to load modules whose location is specified in the paths section of tsconfig.json when using webpack. This package provides the functionality of the tsconfig-paths package but as a webpack plug-in.

How to install

NOTE: If you are using webpack 4 you need to use version >= 3.0.0 (which is aso backwards compatible with webpack 3).

yarn add --dev tsconfig-paths-webpack-plugin

or

npm install --save-dev tsconfig-paths-webpack-plugin

How to use

In your webpack config add this:

const TsconfigPathsPlugin = require('tsconfig-paths-webpack-plugin');

module.exports = {
  ...
  resolve: {
    plugins: [new TsconfigPathsPlugin({ /*configFile: "./path/to/tsconfig.json" */ })]
  }
  ...
}

Notice that the plugin is placed in the resolve.plugins section of the configuration. tsconfig-paths-webpack-plugin is a resolve plugin and should only be placed in this part of the configuration. Don't confuse this with the plugins array at the root of the webpack configuration object.

Typescript support

This package has typescript typings included. If your webpack config is using typescript, you can use this syntax to import the default export:

import TsconfigPathsPlugin from "tsconfig-paths-webpack-plugin";

Or you can use this syntax to import the named export:

import { TsconfigPathsPlugin } from "tsconfig-paths-webpack-plugin";

Options

configFile (string) (default='tsconfig.json')

Allows you to specify where to find the TypeScript configuration file.

You may provide

  • just a file name. The plugin will search for the filename using the built-in logic in the tsconfig-paths package. The search will start at cwd.
  • a relative path to the configuration file. It will be resolved relative to cwd.
  • an absolute path to the configuration file.

The use of cwd as default above is not optimal but we've found no better solution yet. If you have a suggestion please file an issue.

extensions (string[]) (default=[".ts", ".tsx"])

An array of the extensions that will be tried during resolve. Ideally this would be the same as the extensions from the webpack config but it seems resolver plug-ins does not have access to this infomration so you need to specify it again for the plugin.

baseUrl (string) (default=undefined)

This allows you to override the baseUrl found in tsconfig.json. The baseUrl specifies from which directory paths should be resolved. So this option enabled you to resolve from anhother directory than the one where tsconfig.json is located. This can be useful if you want to use webpack with tsc --watch instead of a typescript loader. If this option is undefined then the baseUrl from tsconfig.json will be used.

mainFields (string[]) (default=["main"])

An array of the field names that should be considered when resolving packages. Ideally this would be the same as the mainFields from the webpack config but it seems resolver plug-ins does not have access to this infomration so you need to specify it again for the plugin.

silent (boolean) (default=false)

If true, no console.log messages will be emitted. Note that most error messages are emitted via webpack which is not affected by this flag.

logLevel (string) (default=warn)

Can be info, warn or error which limits the log output to the specified log level. Beware of the fact that errors are written to stderr and everything else is written to stderr (or stdout if logInfoToStdOut is true).

colors (boolean) (default=true)

If false, disables built-in colors in logger messages.

logInfoToStdOut (boolean) (default=false)

This is important if you read from stdout or stderr and for proper error handling. The default value ensures that you can read from stdout e.g. via pipes or you use webpack -j to generate json output.

How to test

To run the provided example:

yarn example

Prior work

This project uses work done in the awesome-typescript-loader.


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