https://github.com/discord/babel-plugin-define-patterns

Create constants that replace various expressions at build-time
https://github.com/discord/babel-plugin-define-patterns

babel babel-plugin loader webpack webpack-loader

Last synced: about 1 month ago
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Create constants that replace various expressions at build-time

• Host: GitHub
• URL: https://github.com/discord/babel-plugin-define-patterns
• Owner: discord
• License: mit
• Created: 2020-04-16T03:36:20.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2023-07-11T08:32:19.000Z (over 1 year ago)
• Last Synced: 2024-10-01T03:40:56.131Z (about 2 months ago)
• Topics: babel, babel-plugin, loader, webpack, webpack-loader
• Language: JavaScript
• Size: 182 KB
• Stars: 38
• Watchers: 10
• Forks: 6
• Open Issues: 14
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# babel-plugin-define-patterns

> Create constants that replace various expressions at build-time

## Install

```sh

npm install --save-dev babel-plugin-define-patterns

```

## Usage

```js

// babel.config.json

{

  "plugins": [

    ["define-patterns", {

      "replacements": {

        "process.env.NODE_ENV": "production",

        "typeof window": "object",

        "__DEV__": true,

        "require('currentBuildNumber')": 42

      }

    }]

  ]

}

```

## Example

**Input:**

```js

process.env.NODE_ENV

```

**Options:**

```json

{

	"replacements": {

		"process.env.NODE_ENV": "development"

	}

}

```

**Output:**

```js

"development"

```

For more examples see [input.txt](./fixtures/input.txt) and

[output.txt](./fixtures/output.txt).