Process.on is not a function

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Explanation:

The error “process.on is not a function” typically occurs when the code tries to use the process.on method, but it is not available.

This error is commonly seen in the browser environment where the process object is not available by default. The process object is specific to Node.js and provides various functionalities related to the current process.

Example:

In a web browser environment, the process.on method is not available. Trying to use it will result in the mentioned error. For example:

    
      process.on('uncaughtException', (err) => {
        console.log('Caught exception:', err);
      });

In this example, the code attempts to set up an event handler for uncaught exceptions using the process.on method. However, since the process object is not available in the browser, the error “process.on is not a function” will occur.

To fix this issue, you can remove or replace the usage of process.on with an appropriate alternative for the browser environment. For example, in a browser, you can use the window.onerror event to handle JavaScript errors:

    
      window.onerror = function (errorMsg, url, lineNumber) {
        console.log('Caught exception:', errorMsg, 'at', url, 'line', lineNumber);
      };

In this alternative approach, the window.onerror event is used to catch JavaScript errors and log them to the console. This event provides similar functionality to process.on, but it is compatible with the browser environment.

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