angular.js最核心的几句

它们是放在框架的最后几句，由于自带太多指令了。因此可允许用户一行JS也不用就能构建一个智能的应用。

  bindJQuery();

  publishExternalAPI(angular);

  jqLite(document).ready(function() {
    angularInit(document, bootstrap);
  });

决定是使用jQuery还是自带的jqLite，如果是jQuery还要加工一下。

function bindJQuery() {
  // bind to jQuery if present;
  jQuery = window.jQuery;
  // reset to jQuery or default to us.
  if (jQuery) {
    jqLite = jQuery;
    extend(jQuery.fn, {
      scope: JQLitePrototype.scope,
      controller: JQLitePrototype.controller,
      injector: JQLitePrototype.injector,
      inheritedData: JQLitePrototype.inheritedData
    });
    JQLitePatchJQueryRemove('remove', true);
    JQLitePatchJQueryRemove('empty');
    JQLitePatchJQueryRemove('html');
  } else {
    jqLite = JQLite;
  }
  angular.element = jqLite;
}

function publishExternalAPI(angular){
  extend(angular, {
    'bootstrap': bootstrap,//这些都是Angular.js这件的内部方法,需要将它们放到angular中去
    'copy': copy,
    'extend': extend,
    'equals': equals,
    'element': jqLite,
    'forEach': forEach,
    'injector': createInjector,
    'noop':noop,
    'bind':bind,
    'toJson': toJson,
    'fromJson': fromJson,
    'identity':identity,
    'isUndefined': isUndefined,
    'isDefined': isDefined,
    'isString': isString,
    'isFunction': isFunction,
    'isObject': isObject,
    'isNumber': isNumber,
    'isElement': isElement,
    'isArray': isArray,
    'version': version,
    'isDate': isDate,
    'lowercase': lowercase,
    'uppercase': uppercase,
    'callbacks': {counter: 0}
  });

  angularModule = setupModuleLoader(window);
  try {
    angularModule('ngLocale');
  } catch (e) {
    angularModule('ngLocale', []).provider('$locale', $LocaleProvider);
  }

  angularModule('ng', ['ngLocale'], ['$provide',
    function ngModule($provide) {
      $provide.provider('$compile', $CompileProvider).
        directive({///ng/directive/这个文件下的所有JS文件，一个指令一个JS文件。里面告诉编译器如何抽取它们与绑定事件。
            a: htmlAnchorDirective,
            input: inputDirective,
            textarea: inputDirective,
            form: formDirective,
            script: scriptDirective,
            select: selectDirective,
            style: styleDirective,
            option: optionDirective,
            ngBind: ngBindDirective,
            ngBindHtmlUnsafe: ngBindHtmlUnsafeDirective,
            ngBindTemplate: ngBindTemplateDirective,
            ngClass: ngClassDirective,
            ngClassEven: ngClassEvenDirective,
            ngClassOdd: ngClassOddDirective,
            ngCsp: ngCspDirective,
            ngCloak: ngCloakDirective,
            ngController: ngControllerDirective,
            ngForm: ngFormDirective,
            ngHide: ngHideDirective,
            ngInclude: ngIncludeDirective,
            ngInit: ngInitDirective,
            ngNonBindable: ngNonBindableDirective,
            ngPluralize: ngPluralizeDirective,
            ngRepeat: ngRepeatDirective,
            ngShow: ngShowDirective,
            ngSubmit: ngSubmitDirective,
            ngStyle: ngStyleDirective,
            ngSwitch: ngSwitchDirective,
            ngSwitchWhen: ngSwitchWhenDirective,
            ngSwitchDefault: ngSwitchDefaultDirective,
            ngOptions: ngOptionsDirective,
            ngView: ngViewDirective,
            ngTransclude: ngTranscludeDirective,
            ngModel: ngModelDirective,
            ngList: ngListDirective,
            ngChange: ngChangeDirective,
            required: requiredDirective,
            ngRequired: requiredDirective,
            ngValue: ngValueDirective
        }).
        directive(ngAttributeAliasDirectives).
        directive(ngEventDirectives);
      $provide.provider({//这是直接放在ng目标下的文件,用于提供不同的功能与重要对象
        $anchorScroll: $AnchorScrollProvider,
        $browser: $BrowserProvider,
        $cacheFactory: $CacheFactoryProvider,
        $controller: $ControllerProvider,
        $document: $DocumentProvider,
        $exceptionHandler: $ExceptionHandlerProvider,
        $filter: $FilterProvider,
        $interpolate: $InterpolateProvider,
        $http: $HttpProvider,
        $httpBackend: $HttpBackendProvider,
        $location: $LocationProvider,
        $log: $LogProvider,
        $parse: $ParseProvider,
        $route: $RouteProvider,
        $routeParams: $RouteParamsProvider,
        $rootScope: $RootScopeProvider,
        $q: $QProvider,
        $sniffer: $SnifferProvider,
        $templateCache: $TemplateCacheProvider,
        $timeout: $TimeoutProvider,
        $window: $WindowProvider
      });
    }
  ]);
}

function bootstrap(element, modules) {//开始构娅应用
  var resumeBootstrapInternal = function() {
    element = jqLite(element);
    modules = modules || [];
    modules.unshift(['$provide', function($provide) {
      $provide.value('$rootElement', element);
    }]);
    modules.unshift('ng');
    var injector = createInjector(modules);
    injector.invoke(['$rootScope', '$rootElement', '$compile', '$injector',
       function(scope, element, compile, injector) {
        scope.$apply(function() {
          element.data('$injector', injector);
          compile(element)(scope);
        });
      }]
    );
    return injector;
  };

  var NG_DEFER_BOOTSTRAP = /^NG_DEFER_BOOTSTRAP!/;

  if (window && !NG_DEFER_BOOTSTRAP.test(window.name)) {
    return resumeBootstrapInternal();
  }

  window.name = window.name.replace(NG_DEFER_BOOTSTRAP, '');
  angular.resumeBootstrap = function(extraModules) {
    forEach(extraModules, function(module) {
      modules.push(module);
    });
    resumeBootstrapInternal();
  };
}