The relationship between the computed function and other functions in the Vue document

Vue is a popular front-end framework that provides some convenient instructions and functions to help us quickly build complex interactive interfaces. The computed function is a very important function in Vue. It is responsible for calculating the derived variables of the data and automatically updating the relevant interface when the data changes.

However, in the Vue documentation, we can also see some other functions, such as watch, methods, etc. How do these functions relate to the computed function? In this article, we’ll delve deeper into this issue.

First, let’s take a look at the characteristics of the computed function. A computed function is a computed property that depends on other data and automatically updates based on changes in these data. The computed function is very useful for complex logic, such as filtering out qualified data from an array, or calculating a dynamic table data.

Similar to the computed function, there is also the methods function. The methods function can also be used to calculate derived variables, but its difference from the computed function is that the methods function needs to be called manually, while the computed function will automatically calculate and update.

So why do we need to use the methods function? The main reason is that the methods function can perform more complex logic. If we need to sort, filter or perform other complex operations on data, we need to use the methods function.

In addition to computed and methods functions, Vue also provides watch functions. The watch function can be used to monitor changes in certain data and execute some logic when it changes. The difference between the watch function, the computed function and the methods function is that the watch function can handle complex asynchronous operations and can monitor changes in multiple data.

In actual development, we usually use the computed function as our most commonly used function because it is relatively simple and convenient. However, if we need to perform more complex logic, we need to use the methods function or watch function.

To summarize, the relationship between the computed function and other functions in the Vue document is as follows:

1. The computed function is a computed property that automatically calculates and updates derived variables.
2. The methods function can be used to perform more complex logic, but it needs to be called manually.
3. The watch function can monitor and process data changes, including asynchronous operations and multiple data changes.

Finally, one thing to note is that we should not abuse these functions. For the maintainability and readability of the code, we should use computed functions as much as possible, and only use methods and watch functions when necessary.

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