The difference between uniapp and vue data

Vue and Uniapp are both Vue-based frameworks. There are many similarities between them, but there are also some differences. One of them is the way data is managed. In Vue, we usually use the data attribute to store component data, while in Uniapp, we can use the data attribute or the state attribute. In this article, we will compare the similarities and differences between these two approaches to data management.

1. Data management in Vue

One of the most basic attributes in the Vue component is the data attribute, which is used to store the data of the component. When the component is instantiated, the properties in data will be added to the component instance, and this property can be obtained through the component template.

For example, in the following code, we define a Vue component:

<template>
  <div>
    <p>{{ message }}</p>
  </div>
</template>

<script>
export default {
  data () {
    return {
      message: 'Hello, Vue!'
    }
  }
}
</script>

In the above code, we define a component and store the message attribute in data. In the template, we use double curly brace syntax to output the value of the message attribute to the page.

2. Data management in Uniapp

Similar to Vue, Uniapp can also use the data attribute to store component data. But unlike Vue, Uniapp also provides a property called state for storing component data, which can be accessed and modified in any component.

For example, in the following code, we define a Uniapp component:

<template>
  <div>
    <p>{{ message }}</p>
  </div>
</template>

<script>
export default {
  data () {
    return {
      message: 'Hello, Uniapp!'
    }
  },
  state: {
    count: 0
  }
}
</script>

In the above code, we define a component and store the message attribute in data. We also define a count property in state.

3. Differences

The data attribute in Vue and the data attribute and state attribute in Uniapp are both used to store component data, but there are some differences:

1. Different data sharing methods

In Vue, the data attribute is local and can only be accessed and modified within the component. If you want to pass data to child components, you can use the props attribute.

In Uniapp, the state attribute is global and can be accessed and modified in any component. If you want child components to use data in state, you can use Vuex.

2. Data modification methods are different

In Vue, we usually modify the properties in data through methods. This method can be defined inside the component or in the component. Defined in the parent component and passed to the child component.

But in Uniapp, we usually use the global setState method to modify the properties in the state. For example:

this.$store.setState('count', this.$store.state.count + 1)

In this example, we use the setState method to modify the count attribute in state. This method is global and can be used in any component.

3. Different data binding methods

In Vue, we usually use double curly brace syntax to bind the properties in data to the template. For example:

<p>{{ message }}</p>

In Uniapp, we usually use the v-model directive to bind properties in the state to components. For example:

<uni-input v-model="count"></uni-input>

In this example, we use the v-model directive to bind the count attribute in state to the input box component of Uniapp.

Summary

Vue and Uniapp are both Vue-based frameworks. There are many similarities between them, but there are also some differences, one of which is the different ways of data management. In Vue, we usually use the data attribute to store component data, while in Uniapp, we can use the data attribute or the state attribute. The difference between the two is the data sharing method, data modification method and data binding method. Understanding these differences can help us better develop Vue-based applications.

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