typescript-plugin-unassert

Motivation

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

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.

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 dir which is minimum usage.