详解AngularJS 模块化

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学习要点：

控制器模块化
指令模块化
过滤器模块化
服务模块化
定义值模块化
使用模块工作

第一步：创建一个模块

// function : define module named exampleApp
// param detail :
// param one : module name
// param two : relay on modules collection
// parms three : config information
var myApp = angular.module("exampleApp", ["exampleApp.Controllers", ["exampleApp.Controllers", "exampleApp.Filters", "exampleApp.Directives", "exampleApp.Service", "exampleApp.Values"])

在视图中应用模块

<!-- use module -->
<html ng-app="exampleApp">
 ...
</html>

第二步：定义值

var valueModule = angular.module("exampleApp.Values", [])
// defind value
var now = new Date();
valueModule.value("nowValue", now);

第三步：定义服务

var serviceModule = angular.module("exampleApp.Service", [])
// function : define a service named days
serviceModule.service("days", function (nowValue) {
  this.today = nowValue.getDay();
  this.tomorrow = this.today + 1;
 })

第四步：定义控制器

var controllerModule = angular.module("exampleApp.Controllers", []);
// function : define a controller named dayCtrl
// the controller include two param:
// param detail:
// param one : name of controller
// param two : a factory function 
// the param $scope of factory function show information to view
controllerModule.controller("dayCtrl", function ($scope, days) {  
 // days : use custom service
 // today is ...
 $scope.day = days.today;
 // tomorrow is ...
 $scope.tomorrow = 7;
})

将控制器应用于视图

<!-- use controller -->
 <div class="panel" ng-controller="dayCtrl">
  <div class="panel-header">
   <h3>Angular App</h3>
  </div>
  <!-- if the day is undefined, show unknow -->
  <!-- use filter and data binding -->
  <h4>Today is {{ day || "unknow" }}</h4>
  <h4>Tomorrow is {{ tomorrow || "unknow" }}</h4>
 </div>

第五步：定义指令

var directiveModule = angular.module("exampleApp.Directives", []);
// function : define a directive named highlight
// it accepts two param
// param one : the name of directive 
// param two : a factory method
directiveModule.directive("highlight", function ($filter) {

  // get the filter function
  var dayFilter = $filter("dayName");

  // param detail:
  // scope : view scope of action
  // element : the element which uses the custom directive
  // attrs : the attrs of the element
  return function (scope, element, attrs) {
   // console.log(dayFilter(scope.day));
   if (dayFilter(scope.day) == attrs['highlight']) {
    element.css("color", 'red');
   }
  }
 })

将指令应用于视图

...
<h4 highlight="Saturday">Today is {{ day || "unknow" | dayName }}</h4>
...

第六步：定义过滤器

var filterModule = angular.module("exampleApp.Filters", []);
// function : define a fitler named dayName
filterModule.filter('dayName', function () {

 var dayNames = ['Sunday', "Monday", 'Tuesday', 'Wednesday', 'Thurday', 'Friday', 'Saturday'];
 return function (input) {
  // input is the value of data binding
  return angular.isNumber(input % 7) "htmlcode">

<!-- 用 | 分开 -->
<h4 highlight="Saturday">Today is {{ day || "unknow" | dayName }}</h4>
<h4>Tomorrow is {{ tomorrow || "unknow" | dayName }}</h4>


最后，下面是完整的代码： 


文件一：example.html


<!DOCTYPE>
<!-- use module -->
<html ng-app="exampleApp">
<head>
 <title>Angluar test</title>
 <meta charset="utf-8"/>
 <link rel="stylesheet" type="text/css" href="css/bootstrap.min.css" rel="external nofollow" >
 <link rel="stylesheet" type="text/css" href="css/bootstrap-theme.min.css" rel="external nofollow" >
</head>
<body>
 <!-- use controller -->
 <div class="panel" ng-controller="dayCtrl">
  <div class="panel-header">
   <h3>Angular App</h3>
  </div>
  <!-- if the day is undefined, show unknow -->
  <!-- use defined directive "highlight" -->
  <!-- use filter and data binding -->
  <h4 highlight="Saturday">Today is {{ day || "unknow" | dayName }}</h4>
  <h4>Tomorrow is {{ tomorrow || "unknow" | dayName }}</h4>
 </div>
<script type="text/javascript" src="/UploadFiles/2021-04-02/angular.min.js">

文件二：services/exampleService.js


var serviceModule = angular.module("exampleApp.Service", [])
// function : define a service named days
serviceModule.service("days", function (nowValue) {
  this.today = nowValue.getDay();
  this.tomorrow = this.today + 1;
 })


文件三：values/exampleValue.js


var valueModule = angular.module("exampleApp.Values", [])
// defind value
var now = new Date();
valueModule.value("nowValue", now);




文件四：directives/exampleDirective.js


var directiveModule = angular.module("exampleApp.Directives", []);
// function : define a directive named highlight
// it accepts two param
// param one : the name of directive 
// param two : a factory method
directiveModule.directive("highlight", function ($filter) {

  // get the filter function
  var dayFilter = $filter("dayName");

  // param detail:
  // scope : view scope of action
  // element : the element which uses the custom directive
  // attrs : the attrs of the element
  return function (scope, element, attrs) {
   // console.log(dayFilter(scope.day));
   if (dayFilter(scope.day) == attrs['highlight']) {
    element.css("color", 'red');
   }
  }
 })




文件五：controllers/exampleController.js


var controllerModule = angular.module("exampleApp.Controllers", []);
// function : define a controller named dayCtrl
// the controller include two param:
// param detail:
// param one : name of controller
// param two : a factory function 
// the param $scope of factory function show information to view
controllerModule.controller("dayCtrl", function ($scope, days) {  // days : use custom service
 // today is ...
 $scope.day = days.today;
 // tomorrow is ...
 $scope.tomorrow = days.tomorrow;
})


文件六：filters/exampleFilter.js


var filterModule = angular.module("exampleApp.Filters", []);
// function : define a fitler named dayName
filterModule.filter('dayName', function () {

 var dayNames = ['Sunday', "Monday", 'Tuesday', 'Wednesday', 'Thurday', 'Friday', 'Saturday'];
 return function (input) {
  // input is the value of data binding
  return angular.isNumber(input % 7) ? dayNames[input % 7] : input % 7;
 };
})



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