wapshop/node_modules/vue-loader/lib/component-normalizer.js

// this module is a runtime utility for cleaner component module output and will
// be included in the final webpack user bundle

module.exports = function normalizeComponent (
  rawScriptExports,
  compiledTemplate,
  scopeId,
  cssModules
) {
  var esModule
  var scriptExports = rawScriptExports = rawScriptExports || {}

  // ES6 modules interop
  var type = typeof rawScriptExports.default
  if (type === 'object' || type === 'function') {
    esModule = rawScriptExports
    scriptExports = rawScriptExports.default
  }

  // Vue.extend constructor export interop
  var options = typeof scriptExports === 'function'
    ? scriptExports.options
    : scriptExports

  // render functions
  if (compiledTemplate) {
    options.render = compiledTemplate.render
    options.staticRenderFns = compiledTemplate.staticRenderFns
  }

  // scopedId
  if (scopeId) {
    options._scopeId = scopeId
  }

  // inject cssModules
  if (cssModules) {
    var computed = Object.create(options.computed || null)
    Object.keys(cssModules).forEach(function (key) {
      var module = cssModules[key]
      computed[key] = function () { return module }
    })
    options.computed = computed
  }

  return {
    esModule: esModule,
    exports: scriptExports,
    options: options
  }
}