Who hasn’t experienced the annoying showstopper where your email or web app suddenly stops working and displays the dreaded ‘postman: You need to enable JavaScript to run this app’ error? This can happen to anyone at any time. In this blog, we will take a look at the different ways in which you can fix this error.

What is “postman: You need to enable JavaScript to run this app”?

When using Postman to run your project, you may get the following error.

postman: You need to enable JavaScript to run this app

Cause of error

When you get this error, you are most likely suffering from one of the following causes:

1. The endpoint doesn’t exist; this could be a spelling error;
2. The Server port is different.
3. Your website’s URL is incorrect
4. The endpoint could be working perfectly in Development. However, somewhere the staging or production it caused an error.

How to fix it?

This is a fairly common error, here are some of our solutions. Please consult and choose the appropriate method for your program.

Option 1: Edit URL path

Try removing or adding “/” at the start of the URL, especially when you don’t provide your hostname. i.e. fetch('getusername') is different from fetch('/getusername').  This is fine in the development phase, however not when already implemented in the field, as it indicates a an alternative route.

Option 2: Do the same thing in a web browser

POSTMAN, in our opinion, is not able to perform JavaScript in its console. It may work if you do the same thing in a web browser (you won’t get this error code).

Option 3: Accessing URL through the browser.

If you get the error caused by the wrong URL, try accessing it through the browser.

Conclusion

We hope our blog post on how to solve the “postman: You need to enable JavaScript to run this app” problem was useful. With this information, you should be able to handle this annoyance and a slew of other concerns when you design your application.

Please leave a comment if you want to learn more about the topic or if you have any questions or ideas to share. Thank you for taking the time to read this!