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  • License MIT

Module to hook into the Node.js require function

Package Exports

  • require-in-the-middle

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (require-in-the-middle) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

require-in-the-middle

Hook into the Node.js require function. This allows you to modify modules on-the-fly as they are being required.

Build status js-standard-style

Installation

npm install require-in-the-middle --save

Usage

var path = require('path')
var hook = require('require-in-the-middle')

// Hook into the express and mongodb module
hook(['express', 'mongodb'], function (exports, name, basedir) {
  var version = require(path.join(basedir, 'package.json')).version

  console.log('loading %s@%s', name, version)

  // expose the module version as a property on its exports object
  exports._version = version

  // whatever you return will be returned by `require`
  return exports
})

API

The require-in-the-middle module exposes a single function:

function ([modules][, options], onrequire) {}
  • modules <string[]> An optional array of module names to limit which modules trigger a call of the onrequire callback. If specified, this must be the first argument.
  • options An optional object containing fields that change when the onrequire callback is called. If specified, this must be the second argument.
    • options.internals Specifies whether onrequire should be called when module-internal files are loaded; defaults to false.
  • onrequire The function to call when a module is required.

    • Supply a callback function as the last argument. This function will be called the first time a module is required. The onrequire function is called with three arguments:

    • exports The value of the module.exports property that would normally be exposed by the required module.
    • name The name of the module being required. If options.internals was set to true, the path of module-internal files that are loaded (relative to basedir) will be appended to the module name, separated by path.sep.
    • basedir The directory where the module is located, or undefined for core modules.

      • Return the value you want the module to expose (normally the exports argument).

      License

      MIT