How to write a .nvmrc file which automatically change node version – Nvm

The Problem:

A developer is using Node Version Manager (nvm) to manage multiple Node.js versions. They have two projects, one that requires Node.js version 4.4.7 and another that requires Node.js version 6. They want to know how to create a .nvmrc file that will automatically switch the Node.js version when they change directories to the project directory. This way, they can use the correct version of Node.js for each project without having to manually change it.

The Solutions:

Solution 3: Using .nvmrc File to Automatically Switch Node Version

To write a .nvmrc file that automatically changes the Node version when you switch to a specific project directory, follow these steps:

1. Open a terminal window and navigate to the root directory of your project.

2. Run the following command to check the current Node version:

node -v

3. Note the output of the command. This is the Node version that you want to use for your project.

4. Run the following command to create a .nvmrc file in your project directory:

touch .nvmrc

5. Open the .nvmrc file in a text editor.

6. Add the following line to the file, replacing <node-version> with the Node version that you want to use for your project:

<node-version>

7. Save and close the .nvmrc file.

8. Open a new terminal window and navigate to the root directory of your project.

9. Run the following command to initialize the nvm environment:

nvm use

10. Run the following command to change to the Node version specified in the .nvmrc file:

nvm install

11. Verify that the Node version has been changed by running the following command:

node -v

The output of the command should match the Node version that you specified in the .nvmrc file.

Now, when you cd into the project directory, nvm will automatically switch to the Node version specified in the .nvmrc file.

Solution 4: Create a .nvmrc file and use nvm use command

To automatically change the Node.js version when a specific project is loaded, follow these steps:

1. Create a `.nvmrc` file at the root of your project directory. This file should contain the desired Node.js version for the project.
2. For example, if you want to use Node.js version 12.20.0, you would create a `.nvmrc` file with the following contents:

v12.20.0

3. Once you have created the `.nvmrc` file, you can navigate to the project directory in your terminal and run the following command:

nvm use

4. This command will read the `.nvmrc` file and automatically switch to the specified Node.js version. You can verify that the correct version is being used by running the following command:

node -v

5. You should see the version specified in the `.nvmrc` file printed in the terminal.
6. There is no automated way to change the Node.js version when a different project is loaded. However, you can create a bash script that自動化された方法はありませんNode.jsのバージョンを変更すると、別のプロジェクトがロードされます。ただし、自動的にこれを行うbashスクリプトを作成することはできます。 does this for you. The NVM documentation provides detailed instructions on how to create such a script.

Solution 5: Using NPM Scripts to Change Node Version Automatically

To automatically switch between Node.js versions when working on different Angular projects, you can use NPM scripts in your package.json file. Here’s how:

1. Create a .nvmrc File:

• In the root directory of each project, create a .nvmrc file.

• Inside the .nvmrc file, specify the desired Node.js version for that project. For example:

  18.10.0
  

2. Add NPM Scripts:

• Open the package.json file for each project.

• Add the following scripts to the "scripts" section:

  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "preinstall": "nvm use",
    "prebuild": "nvm use",
    "build": "tsc"
  },
  

• The "preinstall" and "prebuild" scripts will automatically switch to the Node.js version specified in the .nvmrc file before running the npm install or npm build commands, respectively.

3. Use the Scripts:

• When you run npm install or npm build for a project, the corresponding script will be executed, and the Node.js version will be switched automatically based on the .nvmrc file.

Note:

• The preinstall hook is only called when doing npm install and not when installing a specific module.