Advantages of composition API

Composition API( combined API) yes vue3 Writing , Understand the combination in a popular way API Is in the setup Data in （data）, Method （methods） Wait for configuration .
vue2 Is used in Options API( Configuration API)

Options API

Using tradition OptionsAPI in , Add or modify a requirement , You need to separate in data,methods,computed Internal modification .
Functions cannot be independent , If there are many functions, it will be very messy .

Icon ：（ A color represents a function ）

Composition API

We can organize our code more gracefully , function . Make the code of related functions more orderly organized together .
Such as ： We use hook function , Put a function in a hook function in , When it needs to be used, it is directly in setup Use in .use Can be introduced . Realize the separation of functions , More orderly code .

Icon ：（ A color represents a function ）