What types of data are there in vue?

Vue is a popular JavaScript framework that allows developers to build interactive web applications through data-driven views. In the core of Vue, the most important data attribute is data, which is responsible for storing the data of all components. So, what types of data are there in Vue? This article will answer this question for you.

1. Data type

In Vue, the data attribute can store a variety of data types, including:

1. String: in data , string is the most common data type. The string type is a sequence of characters, which can contain letters, numbers, symbols, etc. In Vue components, we can use double quotes or single quotes to define string type data.
2. Number: Another commonly used data type is number. Numeric types refer to integers or floating point numbers. In Vue's data attribute, we can directly use numbers or expressions to define numeric type data.
3. Boolean (Boolean): The Boolean type means that there are only two values: true and false. In Vue's data attribute, we can use Boolean values ​​to represent and control the state of the component.
4. Object (Object): Object type refers to a set of related data and methods. In Vue, we can define an object in data and use it to store the component's state and data.
5. Array (Array): The array type refers to a collection of related data. In Vue, we can use arrays to store list data, such as a user list component.
6. Function: A function type refers to a set of code blocks that are contained in a single named group and can be called when needed. In Vue, we can define a function in data and bind it to the component context.
7. Symbol: The symbol type is a new data type introduced in ES6. Each symbol is unique and can be used as an object property name. In Vue, symbolic types can be used as identifiers for programs.

2. Data attribute names

In addition to data types, Vue also supports some special data attribute names, which have different functions. Here are some of the most common data attribute names:

1. computed: Computed attribute, used to define an attribute that is calculated based on the value of another attribute. Computed properties can depend on other data properties, and when the values ​​of these properties change, the computed properties are automatically updated.
2. methods: Method attribute, used to define the method of the component. A method can be any type of JavaScript function that can perform any action.
3. watch: Observation attribute, used to monitor changes in data attribute values. When the data attribute value changes, the watch attribute can automatically perform some operations, such as recalculating the calculated attribute, sending a request to the server, etc.
4. props: Property properties, used to define the external input properties of the component. Through the props attribute, the state of one component can be passed to another component, thereby achieving communication between components.
5. filters: Filter attribute, used to format the component's data into a specific output format. The filters attribute can be used inside {{}} to format data in the template.
6. ref: Reference attribute, used to solve coupling problems between components. Through the ref attribute, you can refer to another component in a component and call its methods or modify its properties.

3. Summary

In Vue, the data attribute is very important. It is responsible for storing all the status and data of the component. In the data attribute, we can store various data types such as strings, numbers, Boolean, objects, arrays, functions and symbols. In addition, Vue also supports some special data attribute names, such as computed, methods, watch, props, filters and ref, etc., each of which has different functions. By learning and mastering these data types and property names, developers can better utilize Vue's data-driven view model and build more efficient and high-quality web applications.

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