Introduction to Mini Program Development: Understanding WXML

This article will give you a detailed explanation of WXML in the entry-level development of small programs. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to everyone.

Introduction to the development framework

The development framework of the small program is composed of four major parts: Composed of WXML, WXSS, WXS, and Java Script.

1. WXML is used to describe the content of the page;

2. WXSS describes the page style;

3. JS is used to handle user logic and data communication;

4. WXS is a manifestation of the enhancement of WXML capabilities. It can perform calculations on the requested data to help wxml quickly build the structure of the page;

WXML syntax

WXML(weixin markup language)

WXML features

WXML has four language features in total , respectively data binding, list rendering, conditional rendering and template reference

1. Data binding:

<!--index.wxml-->
<view>
  <text>{{message}}</text>
</view>
---------------------------------------------------
<!--index.js-->
Page
( 
  {
     data:
          {
            message:"Hello,world!"
          }
  }
)

2. List rendering

<!--index.wxml-->
<view>
  <block wx:for="{{items}}"  wx:for-item="{{item}}"  wx:key="index">
    <view>{{index}}:{{item.name}}</view>
  </block>
</view>
------------------------------------------
<!--index.js-->
Page
(
  {
    data:
        {
          items:[
                {name:"商品A"}
                {name:"商品B"}
                ]
        }
  }
)

3. Conditional rendering

<!--index.xwml-->
<view>今天吃什么？<view>
<view wx:if="{{condicition===1}}">当然是吃饺子啦！</view>
<view wx:elif="{{condicition===2}}">可以考虑吃面条！</view>
<view wx:else>米饭把米饭吧</view>
-----------------------------------------------------------
<!--index.js-->
Page
(
 {
   data:
       {
       condicition:Math.floor(Math.random()*3+1)
       }
 }
)

4. Templates and references

<!--index.wxml 模板-->
<template name="template">
  <view>
    <view>收件人：{{name}}</view>
    <view>联系方式：{{phone}}</view>
    <view>地址：{{address}}</view>
  </view>
</template>
<template is="template" data="{{...item}}" ></template>
--------------------------------------------------------------------
<!--index.js-->
Page
( 
  {
    data:
         {
           item:
                {
                  name="张三",
                  photo="1212123",
                  address="China"
                }
         }
  }
)

<!--index.wxml 引用-->
<import src="a.wxml"></import>
<template is="a"></template>
<!--a.wxml-->
<view>Hello,world</view>
<template name="a">
  Hello World!
</template>

Note: References cannot be nested

<!--index.wxml-->
<include src="a.wxml">
<template is="a"></template>
</include>
------------------------------------
<!--a.wxml-->
<template name="a">
  <view>This is a.wxml</view>
</template>
<view>hello world</view>

Note: include copies all content except the master

This article is reproduced from: https://blog.csdn.net/yue__shen/article/details/90384729

Recommended: "小program Development Tutorial》

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