/**
 * config.js - The configuration for the loader
 */

var configData = config.data = {
  // The root path to use for id2uri parsing
  base: (function() {
    var ret = loaderDir

    // If loaderUri is `http://test.com/libs/seajs/[seajs/1.2.3/]sea.js`, the
    // baseUri should be `http://test.com/libs/`
    var m = ret.match(/^(.+?\/)(?:seajs\/)+(?:\d[^/]+\/)?$/)
    if (m) {
      ret = m[1]
    }

    return ret
  })(),

  // The charset for requesting files
  charset: "utf-8",

  // Modules that are needed to load before all other modules
  preload: []

  // debug - Debug mode. The default value is false
  // alias - An object containing shorthands of module id
  // paths - An object containing path shorthands in module id
  // vars - The {xxx} variables in module id
  // map - An array containing rules to map module uri
  // plugins - An array containing needed plugins
}

function config(data) {
  for (var key in data) {
    var curr = data[key]

    // Convert plugins to preload config
    if (curr && key === "plugins") {
      key = "preload"
      curr = plugin2preload(curr)
    }

    var prev = configData[key]

    // Merge object config such as alias, vars
    if (prev && isObject(prev)) {
      for (var k in curr) {
        prev[k] = curr[k]
      }
    }
    else {
      // Concat array config such as map, preload
      if (isArray(prev)) {
        curr = prev.concat(curr)
      }
      // Make sure that `configData.base` is an absolute directory
      else if (key === "base") {
        curr = normalize(addBase(curr + "/"))
      }

      // Set config
      configData[key] = curr
    }
  }

  emit("config", data)
  return seajs
}

seajs.config = config

function plugin2preload(arr) {
  var ret = [], name

  while ((name = arr.shift())) {
    ret.push(loaderDir + "plugin-" + name)
  }
  return ret
}


@@ -910,16 +910,40 @@
 data) %7B%0A
+  emit(%22config%22, data)%0A%0A
   for (v
@@ -1652,39 +1652,16 @@
  %7D%0A  %7D%0A%0A
-  emit(%22config%22, data)%0A
   return

Change config event to the beginning of config method