https://github.com/januswel/typescript-plugin-unassert

TypeScript plugin to remove assert in production mode of webpack
https://github.com/januswel/typescript-plugin-unassert

plugin typescript webpack

Last synced: 9 months ago
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TypeScript plugin to remove assert in production mode of webpack

• Host: GitHub
• URL: https://github.com/januswel/typescript-plugin-unassert
• Owner: januswel
• Created: 2019-12-23T13:24:06.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2023-01-07T13:08:07.000Z (over 3 years ago)
• Last Synced: 2025-10-02T00:34:15.175Z (9 months ago)
• Topics: plugin, typescript, webpack
• Language: TypeScript
• Size: 511 KB
• Stars: 4
• Watchers: 2
• Forks: 0
• Open Issues: 9
• Metadata Files:
  • Readme: README.md

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README

          
# typescript-plugin-unassert

[![CircleCI](https://circleci.com/gh/januswel/typescript-plugin-unassert.svg?style=svg)](https://circleci.com/gh/januswel/typescript-plugin-unassert)

## Motivation

[Assertion Functions](https://www.typescriptlang.org/docs/handbook/release-notes/typescript-3-7.html#assertion-functions) is available from TypeScript 3.7, but assertion functions are called and processed always, even in production codes.

This plugin eliminates all of `assert` and `assertIsDefined` calls, that are introduced at the official page.

## Getting Started

```console

npm install --save-dev typescript-plugin-unassert ts-loader

# or

yarn add --dev typescript-plugin-unassert ts-loader

```

Write following lines in your `webpack.config.json`.

```js

const unassertTransformer = require('typescript-plugin-unassert')

// snip

module.exports = {

  // snip

  module: {

    rules: [

      {

        test: /\.tsx?$/,

        loader: 'ts-loader',

        options: {

          getCustomTransformers: () => ({

            before: [unassertTransformer],

          }),

        },

        exclude: /node_modules/,

      },

    ],

  },

  // snip

}

```

Make sure to specify something except for `"CommonJS"` for the `"module"` property in `tsconfig.json` if you need tree shaking.

See [`example`](https://github.com/januswel/typescript-plugin-unassert/tree/master/example) dir which is minimum usage.