How to add a database in the web front-end

As Internet technology develops day by day, front-end technology is becoming more and more diversified and complex. When front-end engineers are developing, they usually encounter situations where they need to access or operate a database. This article will introduce some common front-end methods of adding databases.

1. Utilize the API provided by the backend

Generally speaking, front-end developers do not directly operate the database, but interact through the API provided by the backend. Data exchange between the front end and the database can be achieved through API.

How to use the backend API? First, you need to understand the API interface document provided by the backend. According to the required format and parameters in the interface document, the frontend can send requests to the backend through technologies such as AJAX or Fetch to obtain or submit data.

In addition, in order to ensure data security, the backend needs to perform interface verification on the API, generally using mechanisms such as Token or Session to ensure that only verified users can operate and prevent illegal operations and attacks.

2. Use No SQL database

In addition to common relational databases (such as MySQL, Oracle), there is also a very popular no-SQL database, such as MongoDB and Redis. Compared with traditional relational databases, No SQL databases have different storage methods and query methods, which can better adapt to data storage and processing of various needs.

For the front end, an important advantage of using a No SQL database is that it can directly store data in JSON format. The front-end code can directly extract and convert data into JSON format, and then send it to the database. Complex data operations can be completed through the API provided by No SQL database.

In addition, in order to implement MongoDB operations in the front end, it is usually necessary to introduce No SQL ORM frameworks such as Mongoose so that the front end can use the API of the No SQL database more conveniently.

3. Use browser local storage

In some small applications that do not need to access or store large amounts of data or are disconnected from the network at any time, the front end can use browser local storage (Local Storage) and session storage.

These storage methods are all key-value pair storage methods provided by the browser. The storage method is similar to cookies, but the stored things are richer and can store objects, arrays, etc. in JSON format.

The advantage of using the browser's local storage in the front-end is also obvious. It can greatly shorten the back-end processing time, avoid performance problems caused by server concurrency, and improve the operating efficiency of the application.

4. Using the front-end database framework

In some scenarios that require offline use, the front-end may need to use a separate front-end database (Front-end Database).

Some front-end database frameworks (such as IndexDB, LocalStorageDB, etc.) can create and store databases on the browser side. From their own perspective, they are data storage modules. Front-end data can be created and manipulated by themselves to achieve operations including addition, deletion, modification, and query.

Finally, it should be noted that front-end database operations must not only consider the difficulty of data processing, but also must have a strong awareness of data security. At the same time, details such as default values ​​and type verification also need to be handled in order to quickly locate and solve problems.

The above are several ways to add a database on the front end. How to comprehensively combine various advantages and disadvantages and choose the most appropriate method according to specific business needs.

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