How to install VS Code extensions?
Jul 03, 2025 am 12:46 AMInstalling the VS Code extension can be achieved online or offline. 1. Online installation: Open the Extension Market Search Plugin and click Install, pay attention to keeping the network unobstructed and the editor open; 2. Offline installation: After downloading the .vsix file, select installation through the command panel; 3. Notes: If the installation fails, check the network or update VS Code. The extension does not take effect, confirm the enable status and configuration. There is no need to worry about repeated installation, and the system will automatically recognize it. It is recommended to use commonly used extensions such as Prettier, Python, GitLens, Live Server, etc. to improve development efficiency.
Installing the VS Code extension is actually quite straightforward and does not require too many technical thresholds. Just open the editor, find the expansion market, search for the plug-ins you need, and click to install it. However, some details are still easy to be ignored, such as how to install offline, how to manage installed extensions, etc. Below are some practical operation suggestions.

How to install extensions online in VS Code
This is the most common and easiest way:

- Open VS Code and click the "Expand" icon in the activity bar on the left (or press the shortcut key
Ctrl Shift X
). - Enter the extension name you want in the search box, such as "Python" or "Prettier".
- After finding it, click the "Install" button to automatically download and install.
Some extensions may rely on the network environment, and if the company's network has a proxy, you may need to set up an HTTP proxy. Also, do not close VS Code during installation, otherwise the installation may fail.
How to install VS Code extension offline
If you don't have a network environment, you can install the extension in the following ways:

- Access Visual Studio Marketplace on a computer with network.
- Search for the extension you want, go to the details page, and click "Download Extension" to download the
.vsix
file. - Copy this file to the target computer and run
Extensions: Install from VSIX
in VS Code through the command panel. - Select the downloaded
.vsix
file to complete the installation.
This method is suitable for intranet development environments or network restrictions, but be careful whether the extended version is compatible with the current VS Code version.
Frequently Asked Questions and Precautions
Sometimes you may encounter some minor problems:
- Installation failed : It may be because of a network problem or the extension is incompatible with the current VS Code version. You can try to update the editor or change the network environment.
- Extension does not work : remember to check whether the extension is enabled after installation. Some plug-ins also require additional configuration or installation of language servers.
- Repeat installation : VS Code automatically recognizes installed extensions and does not install them repeatedly, but you can view and manage them through the "Installed" tab.
Several commonly used extensions are recommended for reference:
- Prettier: Code Format Tool
- Python: Microsoft's official Python support
- GitLens: Enhanced Git functionality
- Live Server: a lightweight server for local development and debugging
Basically these are the operations. Although there are not many steps, mastering these will allow you to use VS Code more efficiently.
The above is the detailed content of How to install VS Code extensions?. For more information, please follow other related articles on the PHP Chinese website!

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