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# interpret
> A dictionary of file extensions and associated module loaders.
[](https://nodei.co/npm/interpret/)
## What is it
This is used by [Liftoff](http://github.com/tkellen/node-liftoff) to automatically require dependencies for configuration files, and by [rechoir](http://github.com/tkellen/node-rechoir) for registering module loaders.
## API
### extensions
Map file types to modules which provide a [require.extensions] loader.
```js
{
'.babel.js': [
{
module: 'babel-register',
register: function (module) {
module({
// register on .js extension due to https://github.com/joyent/node/blob/v0.12.0/lib/module.js#L353
// which only captures the final extension (.babel.js -> .js)
extensions: '.js'
});
}
},
{
module: 'babel-core/register',
register: function (module) {
module({
extensions: '.js'
});
}
},
{
module: 'babel/register',
register: function (module) {
module({
extensions: '.js'
});
}
}
],
'.buble.js': [
{
module: 'buble/register',
register: function (module) {
module({
extensions: '.js'
});
}
}
],
'.cirru': 'cirru-script/lib/register',
'.cjsx': 'node-cjsx/register',
'.co': 'coco',
'.coffee': ['coffee-script/register', 'coffee-script'],
'.coffee.md': ['coffee-script/register', 'coffee-script'],
'.csv': 'require-csv',
'.eg': 'earlgrey/register',
'.iced': ['iced-coffee-script/register', 'iced-coffee-script'],
'.iced.md': 'iced-coffee-script/register',
'.ini': 'require-ini',
'.js': null,
'.json': null,
'.json5': 'json5/lib/require',
'.jsx': [
{
module: 'babel-register',
register: function (module) {
module({
extensions: '.jsx'
});
}
},
{
module: 'babel-core/register',
register: function (module) {
module({
extensions: '.jsx'
});
}
},
{
module: 'babel/register',
register: function (module) {
module({
extensions: '.jsx'
});
},
},
{
module: 'node-jsx',
register: function (module) {
module.install({
extension: '.jsx',
harmony: true
});
}
}
],
'.litcoffee': ['coffee-script/register', 'coffee-script'],
'.liticed': 'iced-coffee-script/register',
'.ls': ['livescript', 'LiveScript'],
'.node': null,
'.toml': {
module: 'toml-require',
register: function (module) {
module.install();
}
},
'.ts': ['ts-node/register', 'typescript-node/register', 'typescript-register', 'typescript-require'],
'.tsx': ['ts-node/register', 'typescript-node/register'],
'.wisp': 'wisp/engine/node',
'.xml': 'require-xml',
'.yaml': 'require-yaml',
'.yml': 'require-yaml'
};
```
### jsVariants
Same as above, but only include the extensions which are javascript variants.
## How to use it
Consumers should use the exported `extensions` or `jsVariants` object to determine which module should be loaded for a given extension. If a matching extension is found, consumers should do the following:
1. If the value is null, do nothing.
2. If the value is a string, try to require it.
3. If the value is an object, try to require the `module` property. If successful, the `register` property (a function) should be called with the module passed as the first argument.
4. If the value is an array, iterate over it, attempting step #2 or #3 until one of the attempts does not throw.
[require.extensions]: http://nodejs.org/api/globals.html#globals_require_extensions
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