How does javascript build a project (process)

With the rapid development of the Internet and the emergence of various new technologies, JavaScript technology is increasingly used in front-end development. From traditional web development to modern single-page application development, JavaScript has become a must in front-end development. An essential part. However, JavaScript, as a dynamic language, has a large number of dependencies, and traditional development methods can no longer meet the needs of modern development. Therefore, the concept of engineering was proposed and gradually became the mainstream in front-end development.

JavaScript engineering is a development method that modularizes, automates the construction and deployment of JavaScript projects. It can improve the maintainability, scalability and reusability of the project, reduce the error rate during the development process, improve development efficiency, and ensure project quality and stability. This article will introduce the JavaScript engineering construction process.

1. Project initialization

First of all, the project related configuration needs to be initialized locally. Use npm or yarn to manage dependencies, and use build tools such as webpack or gulp to create the skeleton structure of the project. It should be noted that the folder structure, name, code specifications, etc. in the skeleton structure need to be standardized to facilitate subsequent developer maintenance.

2. Code specifications

In teamwork, the consistency of coding style is very important. Using unified coding standards can avoid difficult maintenance problems caused by inconsistent coding styles. Code specifications can be formulated based on company industry standards, or representative open source projects can be selected as a reference. Currently, commonly used code specification checking tools include ESLint and JSHint. Code checking can be configured in the build tool to automatically prompt or repair code that does not meet the specifications.

3. Modularization

In JavaScript engineering, modularization is an essential part. Using modularity can divide functions into smaller parts, improving the maintainability and scalability of the project. Currently, the mainstream modular specifications include CommonJS, AMD, and ES6 Module. The ES6 Module specification has become a specification natively supported by browsers and is also a recommended specification in modern front-end projects. Specific usage methods can be configured in build tools such as webpack.

4. Automated construction

The traditional manual construction method can no longer adapt to the needs of modern projects. Automated builds can automate tasks and streamline development workflows. Mainstream construction tools include webpack and gulp, which can complete a variety of tasks, such as code compression, merging, packaging, image processing, file replacement, etc. Automated deployment is the process of sending code to the server. Commonly used deployment methods include FTP, SCP, rsync, etc. You can also use automated deployment tools, such as Travis CI, etc. Automated deployment can reduce the error rate of manual operations and improve the deployment efficiency of the project. At the same time, reasonable configuration of cache and CDN resources during the automated construction process can reduce front-end and back-end requests and improve page loading speed.

5. Continuous Integration

Continuous integration is a development model that uses automated tools to merge and integrate frequently submitted code into the trunk branch. Continuous integration can improve the stability and reliability of the project, while also enabling rapid iteration and deployment. Commonly used continuous integration tools include Jenkins and Travis CI. In the process of continuous integration, test cases and automated tests need to be written to ensure the quality and reliability of the code. At the same time, the integrated environment needs to be well managed to avoid problems caused by inconsistent environment variables.

6. Project Documentation

Good project documentation can help team members better understand the project structure and functions and avoid miscommunication problems. Project documents should include code specifications, code structure, API documentation, environment configuration, deployment process, etc. At the same time, documents need to be updated regularly to ensure their accuracy and completeness. Documents can be written in formats such as markdown, or automatically generated using automated tools.

This article mainly introduces the construction process of JavaScript engineering. Through the explanation of project initialization, code specification, modularization, automated construction, continuous integration and project documentation, I hope it can help everyone better understand and apply it. The concept and construction process of JavaScript engineering improve the development efficiency and quality of front-end projects.

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