React app / Chrome Dev Tools strange output: "in Startnull" - main.js: 42

Question

When I launch my React application I have a strange output in the console, and I am really curious about it:

I think i could probably be missing a parameter referencing the version of the app, just need some Stackoverflow clarity. Here is my main.js where you can see the issue (line 42):

Thank you!

Version argument is null and by concatenating console log message with it, you see a complete string, try to run in console "my text"+null and you will observe the same result. If you want to see messages as being separate, you should do something like console.log("my message ", variable) — Grigore Budac
– Grigore Budac, Commented Apr 5, 2019 at 4:11

szaske · Accepted Answer · 2019-04-19 18:06:25Z

9

It's the Katalon Recorder Chrome Extension. If you hover over main.js tab you'll be able to see the location of the file.

answered Apr 19, 2019 at 18:06

szaske

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1 Comment

jmrueda Over a year ago

Indeed. This is exactly what is happening. Thank you @szaske.

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