How to use attributes in data in vue

Vue is a front-end MVVM framework. Its core feature is two-way data binding, that is, changes in the view layer will automatically be reflected in the data layer, and changes in the data layer will automatically update the view layer. In Vue, we use the data attribute to store data, which can be referenced by templates and displayed in the view layer.

So, how do we use attributes in Vue's data attribute? This article will introduce in detail how to use attributes in the data attribute in Vue.

How to define a data attribute in Vue

First, we need to understand how to define a data attribute in Vue. In the Vue component, we need to add a data attribute to the component's properties and set it to a function. This function returns an object containing data in which we can define the properties we need to use.

The following is a simple example that defines a Vue component named "person" and defines an attribute named "name" in the data attribute:

<template>
  <div>{{ name }}</div>
</template>

<script>
export default {
  name: "person",
  data() {
    return {
      name: "张三"
    };
  }
};
</script>

In the above code , we defined an attribute named "name" in the data attribute and initialized it to "Zhang San". We can display this value using the "name" attribute in the template.

Then, when setting the data attribute, we can use an object containing multiple attributes. For example:

data() {
    return {
      name: "张三",
      age: 18,
      gender: "male"
    };
  }

In the above code, we define three attributes in the data attribute: name, age and gender, and initialize them to different values.

Referencing the data attribute in the Vue template

In the Vue component definition, we can reference the data attribute in the template, for example:

<script>
export default {
  data() {
    return {
      name: &quot;张三&quot;,
      age: 18,
      gender: &quot;male&quot;
    };
  }
};
</script>

In the above code, we The template references the name, age, and gender attributes in the data attribute respectively, and uses "{{}}" to use them as variables. When the data changes, the values ​​of these variables are updated accordingly.

Change the value of the data attribute

In Vue, we use Vue.set or vm.$set to dynamically add new attributes to the data attribute:

Vue.set(vm, 'age', 19);

In the above code, the Vue.set method adds a new attribute age to the vm's data attribute, with an initial value of 19. Similarly, we can also use vm.$set to perform the same operation.

In addition, we can also use Vue.delete or vm.$delete to delete the attributes in the data attribute:

Vue.delete(vm, 'age');

In the above code, the Vue.delete method deletes the data attribute of vm attribute age in so that it does not exist.

Conclusion

The above is all about how to use attributes in Vue's data attribute. Using Vue's data attribute allows us to store and manage data more conveniently and quickly, and the process of displaying data is also very simple.

However, we also need to note that when changing the value of the data attribute in Vue, we should follow the principle of one-way data flow and use the methods provided by Vue for data operations, so that the code can be better maintained readability and stability.

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