Neuron is A Full Feature CommonJS Module Manager, Dependency Graph Handler and Loader for Browsers
npm install neuronjs

> First of all, neuron is not designed for human developers to use directly. Most usually, it works together with cortex.
Neuron is a full feature CommonJS module loader which makes your node-style modules run in browsers.
- Implements commonjs Module/1.0 standard.
- Fully supports SemVer and SemVer ranges: '^a.b.c', '~a.b.c', '>=a.b.c', etc.
- Implements File Modules of node.js (Maybe the only module loader which could do that.)
- Supports cyclic dependencies.
- Implements require.resolve() for browsers which is similar to node.js.
- Completely isolated sandboxes.
> Neurons are the core components of the nervous system. They processes and transmits chemical signals to others as well as javascript modules work with others by passing runtime objects.
With Cortex and Neuron, we write web modules exactly the same as we work with node.js, with no Module/Wrappings, no *MD, etc.
You could remove all those annoying and noisy things out of your mind, and, just focus on the origin and code your web modules like node.js.
Neuron is designed to run in the background without your concern, UNLIKE RequireJS and many other loaders.
> We're trying to return to the origin of commonjs. There should be only ONE standard, that is, Module/1.0.
**
``sh`
$ node node/build
With ecma5 compatibility
`sh`
$ node node/build ecma5
A package to get the JavaScript file of neuron.
`js`
var neuron = require('neuronjs');
neuron.version(); // 6.0.0
neuron.content(function(err, content){
content; // The file content of neuron.js
});
Returns String the version of neuron for browsers, not the version of npm module neuronjs
- dest pathfunction(err)
- callback
Writes the content of neuron.js to the dest
- callback function(err, content)Buffer
- content the buffer of the content of neuron.js
Gets the content of neuron.js
**
`bash`
npm install
grunt
Frequent configurations, for more, just see Configuration Hierarchies section.
`html`
For the example above:
module 'abc@0.1.1' will be located at 'http://localhost/mod/abc/0.1.1/abc.js'
module identifier.To require modules. See CommonJS Module/1.0
$3
- id
String module identifier.
- callback function(exports) callback must be passed, or require.async will do nothing.Asynchronously loads a module by
id, and then passes the module exports to callback.You should always pass the
callback parameter because neuron can not make sure the exact time when a module is loaded asynchronously.It is NOT a good practice if the logic of your code relies on the result of the
require.async()d module without a callback.
$3
- path
String the relative path to be resolved according to the current module.Returns the resolved absolute path of the resource.
Returns
undefined if path is not a relative path.Returns
undefined if path is even outside the current package.
$3
`js
facade(identifier);facade(identifier, data);
`
Method facade loads a module. If the module.exports has a method named init, facade method will run the init method.We call this kind of modules as facade modules
#### identifier
Stringmodule name with version, seperated with
'@'. For example: 'async@0.1.0'#### data
ObjectIf
data is defined, data will be passed as the parameter of the init method.
**
Developer Guide
Neuron CORE supplies no high-level APIs, which means that neuron core only cares about module dependencies and module wrapping while will do nothing about things such as fetching modules from remote server and injecting them into the current document, and never cares about where a specific module should come from.
You could do all these things in your will (by write your own
lib/load.js and adjust Gruntfile.js). Nevertheless, neuron have a basic configuration file which located at lib/load.js.Configuration
`js
neuron.config(settings);
`#### settings.path
StringCommonJS module path, like
NODE_PATH, default to 'the root directory of neuronjs'.Pay attension that
path will not be resolved to absolute url. So if you don't want a relative path, don't forget 'http://'.
#### settings.loaded
String|Array.To tell neuron loader that those modules are already loaded, and prevent duplicate loading.
If
String, we can separate different ids with '|' (comma).`js
neuron.config({
loaded: ['jquery@1.9.2', 'async@0.2.9']
});
`#### settings.graph
ObjectThe directed graph of all dependencies, which could be parsed by neuron-graph.
The arithmetics to generate the graph is complicated and hard to describe, see https://github.com/kaelzhang/neuron/blob/master/doc/graph.md for details (Too Long; Don't Read)
define()
With cortex, you might NEVER use this method.ALWAYS use builders to generate this method.
`js
define(identifier, dependencies, factory, options);
`$3
Format:
Type:
string The real pathname relative to the root directory of the package.
$3
Array.$3
function(require, exports, module, __filename, __dirname){}$3
##### options.main
Type
Boolean whether the module is the main entry, i.e. the
package.main field in package.json##### options.map
Type
Object .`js
require('./a')
require('./lib')
// ->
// map: {
// './a': 'my@1.0.0/a.js'
// // require a directory
// './lib': 'my@1.0.0/lib/index.js'
// }
`Events
Event | Emitted
------------ | ------------
beforeready | when the module is needed by others
beforeload | before being downloaded
load | when the module is downloaded
ready | when the module is ready to be
require()d`js
neuron.on('ready', function(id){
console.log('module "' + id + '" is ready to be require()d');
});
``