If you got the warning that devtools failed to parse sourcemap then you need to know that either browser is not able to find sourcemap location or file is corrupted.
What is a sourcemap?
Sourcemap are the files which keeps the information to convert original file to the minified file. In one sense you can say that with the help of sourcemap you can get the original file from minified file without impacting the performance.
Why it is needed?
How sourcemaps are identified in files?
Why we get devtools warning?
When devtools are not able to find the sourcemap file in the provided location or the file is corrupt, then they throw a warning. Since, these sourcemaps are used for debugging purpose, so it’s okay to ignore.
How to prevent the warning?
You can also turn off sourcemaps from devtools –
1. Open devtools from browser options (
2. Click on gear icon.
Also, sometimes browser extensions like Adblock causes issues. So turning the extension off will solve the problem.