How to write javascript using idea

In modern web development, JavaScript has long become an indispensable part. At the same time, as the content and functions continue to increase, a more efficient, concise, and easy-to-use tool is needed to write JavaScript code. Among the many tools, IDEA (IntelliJ IDEA) by JetBrains is undoubtedly one of the most popular and reliable choices. This article will lead readers to gain an in-depth understanding of how to write JavaScript in IDEA.

1. Install IDEA

First, you need to download and install the latest IntelliJ IDEA software. You can download it from the official website www.jetbrains.com. After downloading the exe file, double-click to install and follow the steps to install. After the installation is complete, we need to configure IDEA. In IDEA, you need to set the default editor for JavaScript file types. In the upper right corner of the IDEA window, click the "File" menu and select "Settings" - "Editor" - "File Types". Find the JavaScript file type in the dialog box and make sure it is assigned to IDEA.

2. Create a new project

In IDEA, you can create a new JavaScript project. In the main interface of IDEA, select "Create New Project" and select "JavaScript" in the "New Project" dialog box. Under the project name, select a location to save the file on your local machine. You can select the libraries and frameworks you want to use in the following dialog. There is also the option of using npm to manage dependencies if needed.

3. Create JavaScript File

In IDEA, you can easily create a new JavaScript file. In the Projects pane, select the folder where you want to add the new file. Right-click the folder and select New - JavaScript File and specify a file name. It is recommended to save files with a .js file extension. In IDEA, you can choose to use a normal text editor or use a more advanced JavaScript editor. The specific method is as follows:

• After opening the JavaScript file, IDEA will automatically recognize the JavaScript language. Then, select IDEA's "Edit" menu.
• Then select "format code", IDEA will automatically format the code. You can also manually format the code using the "Ctrl Alt L" shortcut key.
• Use the Ctrl Alt O shortcut key or select the "Optimize Imports" option in the "Code" menu to delete unused references and namespaces in JavaScript code.

4. Code completion

IDEA comes with a code completion function that can help you write JavaScript code more efficiently. For example, when typing an object, IDEA will automatically list all the property and method names of the object.

If you are typing JavaScript code relatively quickly, typing the down arrow key can help you initiate code completion. If you don't know the name of a function or object, you can use the search function in IDEA. Use the "Ctrl Go to Symbol..." shortcut to jump to the definition of a function or object.

5. Debug code

In IDEA, you can use the JavaScript debugger to help you debug JavaScript code. The debugger allows you to run JavaScript code in IDEA and inspect variable values, function calls, and other runtime errors as the code executes. In IDEA, you can use several different types of JavaScript debuggers:

• Chrome Debugger - Use Google Chrome's debugger to debug JavaScript code.
• Node.js Debugger - Use the debugger for Node.js to debug JavaScript code.

If you need to use the Chrome debugger, please follow these steps:

• In IDEA, click the "Edit Configurations..." option in the "Run" menu.
• In the Run Profile dialog box, select the JavaScript file you want to run.
• In the upper right corner of the dialog box, click the " " button and select "JavaScript Debug".
• The configuration items will automatically generate some default options. You can change the options as needed.
• Click "OK" to save and exit the configuration window.
• Click the run icon and IDEA will start Chrome and open a new window.
• Now you can debug JavaScript code in a Chrome window.

6. Publish and Deploy

Once you have written the complete JavaScript code, you can use IDEA to package it into a deployable file or upload it to the web server. For example, you can use the "Export to HTML with JavaScript" option in IDEA to package your JavaScript code into an HTML file.

In addition, IDEA also has a very powerful function that can manage dependencies through npm. In IDEA, you can use Node.js’ npm to install and manage dependencies. You just need to add the names of the dependencies you need to install to the package.json file and then use the npm command in IDEA to install them.

Summary

In IDEA, we can use various tools and functions to write JavaScript code, such as automatic code completion, debugger, npm, etc. Using IDEA to write JavaScript code can significantly improve programming efficiency and code readability. As JavaScript's uses continue to expand, IDEA will be an essential tool.

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