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How to choose the route for angular.js

高洛峰

Feb 06, 2017 am 11:41 AM

In a single page, we can add multiple modules so that the web page only loads this module when needed. Module switching can roughly replace web page switching. Therefore, we can realize web page switching through module switching. This switching is loaded on demand.

It seems very common at first glance, but if you think about it carefully, you can find that this idea can solve a lot of resources.

For example, if there is a page that needs to display information about 1,000 products, and each product has a different form of expression (assuming they have their own independent css and js), then generally speaking, we need Prepare 1,000 web pages to load this information. However, using this modular idea, we can just set 1,000 different modules in the background, and then load the corresponding modules of the required products onto a single page as needed.

To achieve the functions introduced above, you must use the routing function.

Main idea:

1. Establish multiple independent modules in the background

2. Establish a routing control module

3. Extract through routing as needed The module needs to be loaded on the homepage

4. While loading, hide other modules.

So, how much effort does it take to establish the routing module? In fact, it is surprisingly simple:

First, write the corresponding code on the main page:

This represents the routing area and the view area, Only when this tag is written will the routing event be triggered:

<html ng-app="myTodo"><head>
    <meta charset="utf-8">
    <title>angularjs • TodoMVC</title>
    <link rel="stylesheet" href="node_modules/todomvc-common/base.css">
    <link rel="stylesheet" href="node_modules/todomvc-app-css/index.css">
    <style>
      .pagination {
        overflow: hidden;
        padding: 20px;
      }
      .pagination ul li {
        width: 60px;
        height: 30px;
        line-height: 30px;
        border:1px solid black;
        float: left;
        list-style-type: none;
        margin-right: 10px;
        text-align: center;
      }
    </style>
  </head>
  <body>
    <ng-view></ng-view> <!-- 路由区域，视图区域-->
    <footer id="info">
      <p>Double-click to edit a todo</p>
      <p>Created by <a href="http://sindresorhus.com">Sindre Sorhus</a></p>
      <p>Part of <a href="http://todomvc.com">TodoMVC</a></p>
    </footer>
     
    <script src="node_modules/angular/angular.js"></script>
    <script src="node_modules/angular-route/angular-route.js"></script>
    <script src="js/app.js"></script>
   
 
</body>
</html>

Everything else is decoration, just look at line 24.

In the routing area and view area, we can add content-even add a web page.

Next, please look at the corresponding app.js.

var app = angular.module("myTodo", [&#39;ngRoute&#39;]);
//路由的配置：
app.config(function($routeProvider) {
 var routeconfig = {
    templateUrl: "body.html",
    controller: "myTodoCtrl"
    /*controller: &#39;myTodoCtrl&#39;*/
  }
 
  var ohter_config = {
    templateUrl: "other.html"
  }
 
  $routeProvider.
   when("",routeconfig).
   //status ： 它对应我们页面的hash: all completed active
   //路由规则的优先级按写法的顺序所决定的
   when("/other", ohter_config).
   when("/:aaa", routeconfig ).
   otherwise( { redirectTo: "/all" });
});
app.controller("myTodoCtrl", function($scope, $routeParams, $filter){
    console.log($routeParams);
   
});

If you only use routing, the above code is enough. It will ensure;

1. When the page stays on the homepage or other strange places, it will automatically jump to

/all
. The URL is - http://127.0 .0.1:8020/finishAngularJS-mark2/index.html#/all
Just pay attention to what comes after index.

2. When the page jump direction is /other, jump to

http://127.0.0.1:8020/finishAngularJS-mark2/iother.html

3. When a specific jump occurs (the three jumps specified here are /active, /complete/all), it will also jump to the corresponding page, but this is a jump under the index——

http://127.0.0.1:8020/finishAngularJS-mark2/index.html#/active

http://127.0.0.1:8020/finishAngularJS-mark2/index.html#/ all

http://127.0.0.1:8020/finishAngularJS-mark2/index.html#/complete

[One thing to note in particular: except 2 will jump out of this page, the others will jump It is displayed in the specified view area and routing area, and the content on the body web page will be loaded. 】

Next we explain the principle:

app.config(function($routeProvider)

This is the code used to set the route, just write it directly

var routeconfig = {
    templateUrl: "body.html",
    controller: "myTodoCtrl"
    /*controller: &#39;myTodoCtrl&#39;*/
  }
 
  var ohter_config = {
    templateUrl: "other.html"
  }

These are two jumps. The jump is an object, templateUrl, that is, the template is body.html. This is why index.html will load body.html. The second parameter is for this template. Add a controller, the name is - myTodoCtrl.

The second jump is passed because it is not important.

$routeProvider.
   when("",routeconfig).
   //status ： 它对应我们页面的hash: all completed active
   //路由规则的优先级按写法的顺序所决定的
   when("/other", ohter_config).
   when("/:aaa", routeconfig ).
   otherwise( { redirectTo: "/all" });
});

This code is used to judge when the hash value changes. When the hash value is "", that is, the second sentence, execute routeconfig

When the hash value is "/other". , that is, in the fifth round, execute other_config

When the hash value is a special variable, the name of the variable is aaa and the value is X (X can be any defined reference, here it is all, complete, active), that is, "/active", "/complete", "/all", execute routeconfig

When the hash value is other situations, it will jump to the hash value by default. For "/all".

We get the hash value, execute the following object, take out the object template, add it to the home page, start the controller, and the entire routing is completed.

The above is the entire content of the selection method of angular.js brought by the editor. I hope it will be helpful to everyone. Please support the PHP Chinese website~

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