How to change the background of vue

Vue is a progressive framework for building user interfaces. Although its main application scenario is front-end development, Vue is also very suitable for building back-end management systems. When building a backend management system, we usually encounter some problems, such as how to change the backend. This article will introduce how to change the backend of Vue.

Why we need to change the backend

When building a backend management system, we usually need to perform operations such as adding, deleting, modifying, and checking data, permission control, login authentication, and logging. These operations require interaction with the backend, which is generally written in server-side languages ​​(such as Java, PHP, etc.), while front-end developers often only use front-end frameworks such as Vue. Therefore, to implement these operations, we need to write interfaces in the background and then call these interfaces on the front end to implement the corresponding functions.

How to change the background

1. Modify the interface address

In Vue, we usually use axios or vue-resource to make network requests. These tools all provide very convenient interfaces. We only need to specify the requested URL when calling. Therefore, if we want to change the background address, we only need to modify the interface address.

For example, the backend address we use during development is http://localhost:8080, but later when we go online, we need to change the backend address to http://api.example.com. Then we only need to change the interface address to http://api.example.com in the Vue configuration file (usually config.js).

2. Modify the request method

In Vue, we can use different request methods such as get, post, put, delete, etc. to make network requests. The background interface generally provides corresponding request methods to handle different types of requests. If we use the post method to request an interface during development, and later need to change it to the get method, then we only need to change the request method to get in the Vue code.

For example, we need to call an interface to obtain the user list. The original method was post:

Vue.prototype.getUserList = function () {
    return this.$http.post('/user/list')
}

Now we need to change it to get:

Vue.prototype.getUserList = function () {
    return this.$http.get('/user/list')
}

3. Modify Request parameters

In Vue, we use params or data parameters to pass request parameters. The background interface will also return different results based on different request parameters. Therefore, if we need to change the request parameters, we need to modify the backend interface accordingly.

For example, originally we needed to get the user information with id 1:

Vue.prototype.getUserInfo = function () {
    return this.$http.post('/user/info', {id: 1})
}

Now we need to get the user information with id 2:

Vue.prototype.getUserInfo = function () {
    return this.$http.post('/user/info', {id: 2})
}

The above is how Vue changes the background method. Of course, if we modify the backend interface, we also need to ensure that the front-end code can correctly handle the returned results. Therefore, when modifying the background interface, we need to carefully check whether the data on the page can be displayed correctly, whether the user can operate normally, etc. Only by ensuring the correctness of front-end and back-end interactions can the back-end management system be made more stable and efficient.

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