Configuring noderJS

How to configure noderJS

  • noderJS can be configured by setting the configuration in the script tag which loads it. It will be the configuration of the default context. For example:
<script type="text/javascript" src="noder.js">
  // put the configuration of the default context here
  • It is also possible to create a new context with a specific configuration. For example, supposing noder is the global variable exposed by noderJS (corresponding to the root module of the default context), the following code creates a new context with the specified configuration:
var newNoder = noder.createContext({
  // put the configuration here

Then, newNoder is the root module of a new context, completely independent from noder. The possibility to have multiple contexts is useful for tests. See the API page for more information about noderJS contexts.

Configuration options

noderJS supports the following configuration options:

    varName: 'noder', // Name of the global variable exposed by noderJS
    // The default value for the default context in a browser is "noder".
    // There is no default for other contexts than the default one.
    // If it is null or contains an empty string, noderJS does not expose any global variable.

    scriptsType: 'application/x-noder', // Type of scripts to execute as CommonJS modules.
    // The default value for the default context in a browser is "application/x-noder".
    // If it contains an empty string, noderJS does not look for scripts to execute as modules.

    main: "lib/myMainModule", // Main module to load when starting
    // If this parameter is defined in the configuration object of the default context,
    // it overrides the value defined after the question mark in the noderJS script tag.
    // A module loaded this way is considered the main module, available through require.main.

    failFast: false, // Whether to fail fast when a dependency cannot be loaded
    // If this parameter is false, noderJS waits for all other dependencies to be loaded before
    // raising the error.
    // If this parameter is true, noderJS raises the error as soon as possible.
    // The default value is true.

    onstart : function (mainModule) {
      // Function to be executed when the main module has been loaded.
      // The reference to the exported object is given as a parameter.

    resolver: {
      "default" : {
        // Default configuration for the resolver.
        // The resolver is called when using `require` or `require.resolve`,
        // in order to convert the parameter into an absolute file name.

        // This configuration object describes the tree of modules.
        // An object value means that a directory with that name exists.
        // A string value means a redirection to some other file/directory
        // The special '.' key specifies the file to use when requiring the directory.

        "underscore" : {}, // require.resolve("underscore") will return "underscore/index.js"
        "uglify-js" : {
          "." : "uglify-js.js" // require.resolve("uglify-js") will return "uglify-js/uglify-js.js"
        "markdown" : {
          "lib" : {
            "." : "markdown.js" // require.resolve("markdown/lib") will return "markdown/lib/markdown.js"
          "." : "lib", // require.resolve("markdown") will also return "markdown/lib/markdown.js"
        // require.resolve("otherLib") will return "otherLib.js"
        // require.resolve("otherLib/myFile") will return "otherLib/myFile.js"

    packaging: {
      // The `packaging` configuration is related to how files are loaded from the server.

      // It allows you to define a base URL, to add some HTTP headers when requesting files,
      // to use preprocessors to change modules content before they are executed, and to specify how files
      // are packaged together.

      baseUrl: "", // Base URL which is prepended to every path when requesting files to the server.
      // It can be either absolute or relative to the current page location.
      requestConfig: {
        // Options passed to the noder-js/request module when requesting files to the server.
        // Here are some useful properties:
        sync: false, // whether requests are synchronous (true) or asynchronous (false, default value).
        headers: {} // map of http headers and their values
      preprocessors: [
        // Items defined in this array define preprocessors which are called before the content of a module
        // is evaluated, allowing each preprocessor to change the content.
        // Preprocessors are called in the order defined here.
        // Pre-processing only applies to unpackaged files.
        // A preprocessor module must export a function in module.export.
        // It is passed 2 arguments: the file content and the file name.
        // Additional arguments can be specified with the options property, which can be
        // either an array (for multiple extra arguments) or any other value (for a single
        // extra argument).
        // The preprocessor is supposed to return the modified file content, or a promise resolving
        // to the modified file content.
          pattern: /\.coffee$/,
          module: "preprocessors/coffeeScript.js"
          pattern: /\.yml$/,
          module: "preprocessors/yaml.js"
          pattern: /\.js$/,
          module: "preprocessors/myJSPreprocessor.js",
          options: {
            // This options object will be passed to myJSPreprocessor as its 3rd argument
            specialFeature: true
      packagesMap: {
        // This section specifies how files are packaged.
        // Any file not included in a package is processed in unpackaged mode.
        "markdown" : {
          // Include all files in the markdown folder (including files in sub-folders):
          "**" : "markdown.js"
        "underscore" : {
          // Include all files in the underscore folder (not including files in sub-folders):
          "*" : "myPackage1.js",
          "exception.js" : "myPackage2.js" // exception.js is not in myPackage1.js but in myPackage2.js
        "myFolder" : {
          "a.js" : "myPackage1.js",
          "b.js" : "myPackage1.js",
          "c.js" : "myPackage2.js"