babel-plugin-transform-define
Compile time code replacement for babel similar to Webpack's DefinePlugin
***
## Quick Start
```shell
$ npm install --save-dev babel-plugin-transform-define
```
**.babelrc**
```json
{
"plugins": [
["transform-define", {
"process.env.NODE_ENV": "production",
"typeof window": "object"
}]
]
}
```
**.babelrc.js**
```js
// E.g., any dynamic logic with JS, environment variables, etc.
const overrides = require("./another-path.js");
module.exports = {
plugins: [
["transform-define", {
"process.env.NODE_ENV": "production",
"typeof window": "object",
...overrides
}]
]
};
```
## Reference Documentation
`babel-plugin-transform-define` can transform certain types of code as a babel transformation.
##### `Identifiers`
*.babelrc*
```json
{
"plugins": [
["transform-define", {
"VERSION": "1.0.0",
}]
]
}
```
*Source Code*
```js
VERSION;
window.__MY_COMPANY__ = {
version: VERSION
};
```
*Output Code*
```js
"1.0.0";
window.__MY_COMPANY__ = {
version: "1.0.0"
};
```
***
##### `Member Expressions`
*.babelrc*
```json
{
"plugins": [
["transform-define", {
"process.env.NODE_ENV": "production"
}]
]
}
```
*Source Code*
```js
if (process.env.NODE_ENV === "production") {
console.log(true);
}
```
*Output Code*
```js
if (true) {
console.log(true);
}
```
***
##### `Unary Expressions`
*.babelrc*
```json
{
"plugins": [
["transform-define", {
"typeof window": "object"
}]
]
}
```
*Source Code*
```js
typeof window;
typeof window === "object";
```
*Output Code*
```js
'object';
true;
```
***
## License
[MIT License](http://opensource.org/licenses/MIT)