Best Tricks To Solve Error: Typeerror: Cannot Read Properties Of Undefined (Reading ‘transformfile’)

Error in a development environment is never a fun experience. And error: TypeError: Cannot read properties of undefined (reading ‘transformFile’) is not necessarily easy to fix. However, there are some ways to troubleshoot and track down the cause. 

The stack trace seems that the source is from a JavaScript file; hence, a proper debug would be required. We will reveal the further steps in the following sections. Let’s scroll down to learn more! 

When Does Building Wheel For Numpy (Pyproject.Toml) Occur?

The above problem, “error: TypeError: Cannot read properties of undefined (reading ‘transformFile’),” occurs when you try to read the properties of an undefined variable. 

This is because JavaScript does not have a concept of undefined variables. So, it throws an error when you try to access the properties of an undefined variable. However, JavaScript is a typed language, so you can always assign any variable to anything else.

2 Easy-To-Do Methods To Fix This Error

Method 1

The first solution is to downgrade the node to v14.18.1. This will allow you to access the properties of undefined variables. Here is the entire guideline:

Step 1: Download version 14.18.1 of the node.

Step 2: Unzip the downloaded file.

Step 3: Open the command prompt and navigate to the unzipped folder.

Step 4: Run the following command to install node v14.18.1:

npm install -g --unsafe-perm [email protected]
Method 2

The second solution is to downgrade nodejs to v8. 9. 5, which is the last working version before Dubie stopped supporting it.

The first step is to uninstall nodejs from your system. To uninstall nodejs, run the following command in the terminal:

sudo apt-get remove nodejs

After that, download the latest 16.12.0 version of nodejs from their website.

Then, install it by running the following code:

sudo apt-get install -y nodejs

Then, you can check if it is working by running the following command:

node -v


In conclusion, to solve the error “TypeError: Cannot read properties of undefined (reading ‘transformFile’)” error, you need first to identify where the error is occurring. 

Once you have specified the issue, you can then apply a solution. In some situations, this may be as simple as ensuring that all your files are correctly named and placed in the correct directory. However, you may need to delve into more complex coding solutions in other cases.

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