# frame

The goal of the Mini Program Development Framework is to enable developers to develop native applications in WeChat in the simplest and most efficient way possible. APP Experienced services.

The whole Mini Program framework system is divided into two parts:Logical layer（App Service) and View layer（View）。Mini Program provides its own view-level description language WXML and WXSS, and based on the JavaScript It provides a data transfer and event system between the view layer and the logic layer, allowing developers to focus on data and logic.

# Data binding of responses

At the heart of the framework is a responsive data binding system that makes it easy to synchronize data with views. When data is modified, only the data needs to be modified at the logical level, and the view layer will update accordingly.

Look at this simple example:

{% Minicode ('l0gLEKmv6gZa') %}

<!-- This is our View -->
<view> Hello {{name}}! </view>
<button bindtap="changeName"> Click me! </button>

// This is our App Service.
// This is our data.
var helloData  = {
  name: 'Weixin' 
}

// Register a Page.
Page({
  data: helloData, 
  changeName: function(e) {
    // sent Data Change to view
    this.setData({
      name: 'MINA'
    })
  }
})

• The developer uses the framework to convert the data in the logical layer Name With the view layer's Name Binding, so it will show when the page is opened Hello Weixin!
• When the button is clicked, the view layer sends changeName To the logical layer, which finds and executes the corresponding event handler
• After the callback function is triggered, the logic layer executes setData Of the operation, will Data to hit the target Name from Weixin Turn into MINA, because the data and the view layer are already bound, so the view layer automatically changes to Hello MINA!。

# Page management

frame Managed the entireMini ProgramPage routing, you can do seamless switching between pages, and give the page a complete life cycle. All the developer has to do is register the page's data, methods, and life periodic functions to the frame All other complex operations are left to the frame Handle.

# Basic components

frame Provides a set of basic components, which come with WeChat style style and special logic, developers can combine the basic components to create powerfulWeChat Mini Program 。

# Rich API

frame Provide rich WeChat native API, can easily tune up WeChat provides capabilities, such as access to user information, local storage, payment functions, etc.