Why is there function in vue?

As Vue becomes one of the hottest frameworks in the front-end world, many front-end developers want to know some of the differences in Vue. One of the most striking is that Vue supports using functions in components.

In many other frameworks, such as React and Angular, it is recommended that you separate functions and components and use component-level state within the component. In Vue, the situation is slightly different.

In Vue, you can define separate functions within components. These functions can be called directly from the component without "exporting" them to other components or services. This is very similar to React's "hooks" in that they also allow code to be shared between components without breaking it into unique abstractions.

Functions in Vue can perform many different tasks. For example, you can use a separate function as a utility library that has nothing to do with template rendering. You can use these utilities to reuse component logic, validate user input, or perform any other task.

Vue also provides a feature called computed properties. A computed property is a function that is designed to perform some operation based on the value of a component's data. This allows you to quickly process and format user input, or dynamically update content in a component.

Compared with functions, computed properties have some advantages in technical implementation. Because computed properties are compiled into code rather than being called at runtime, they enable more efficient code execution. Additionally, since Vue tracks the dependencies of computed properties, when one of the properties changes, it will be recomputed, and so will all other computed properties with the same dependencies.

In general, Vue is a very flexible and powerful framework that allows developers to use functions and calculated properties as they wish. Whether you're reusing logic, or using specific functionality, there are countless reasons for functions in Vue to exist.

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