How to Build threex-armarkerhelper.js for AR.js

To build the 'threex-armarkerhelper.js' file, you will need to follow these steps:

1. Install Node.js: Make sure you have Node.js installed on your computer. You can download it from the official website: https://nodejs.org

2. Navigate to the Folder: Open a command prompt or terminal and navigate to the folder where the 'threex-armarkerhelper.js' file is located (in your case, it's 'C:\Users\Sajadfa\thr').

3. Initialize Node.js Project: Run the following command to initialize a new Node.js project in that folder:

npm init -y

4. **Install Dependencies:** Install the required dependencies by running the following command:

npm install

5. **Build the File:** After the dependencies are installed, you should be able to build the file using the following command:

npm run build

This command will execute the build script specified in the 'package.json' file, which should generate the 'threex-armarkerhelper.js' file.

After the build process is complete, you should be able to use the generated 'threex-armarkerhelper.js' file in your project.