Mini program data-what is it?

What is mini program data-

Data- in mini program is a custom attribute.

The so-called data- is actually the data- prefix plus a custom attribute name. Data can be stored using such a structure. Using data- can solve the current situation of chaotic and unmanaged custom attributes.

dataset

Data can be defined in the component, which will be passed to SERVICE through events. Writing method: Start with data-, multiple words are linked by hyphens -, and cannot contain uppercase letters (uppercase letters will be automatically converted to lowercase letters) such as data-element-type. Finally, hyphens will be converted to camel case in event.currentTarget.dataset elementType.

Example:

<view data-alpha-beta="1" data-alphaBeta="2" bindtap="bindViewTap"> DataSet Test </view>

js code:

Page({
  bindViewTap:function(event){
    event.currentTarget.dataset.alphaBeta === 1 // - 会转为驼峰写法
    event.currentTarget.dataset.alphabeta === 2 // 大写会转为小写
  }
})

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