STEPS to follow:
1) Install the "CODE RUNNER" extension in Visual Studio (VS) (if you have not done so, yet).
2) After that, go to VS «Settings» (by clicking the wheel) and, in the search field on the top, enter: «run code«.
3) You’ll see, to the right, all the options available for «Code Runner» settings. Scroll down, and you’ll see a field that says,
Code-runner: Executor Map By File Extension.
Set the executor of each file extension.
4) Click on: «Edit in Settings.json«.
5) Then, scroll down until you see «code-runner.executorMapByFileExtension» field brackets. You’ll be able to see all the files extensions (e.g., «.vb», «.scala», etc.) and the corresponding executor application that run such files after the colons, to the right.
6) If you don’t see the extension for the file you’re trying to run (e.g., «.js»), just enter it following the same (json) format as the ones above, with the executor program (that you need to know) that runs it, to the right.
EXAMPLE: in the Mac, for a javascript (JS) file with extension «.js» (assuming you’ve already installed NODE, the JS executor app), you should enter a line at the end (inside the last bracket) such as,
«.js»: «node»
(NOTE: make sure you put a coma (,) at the end of the previous line, right before your addition)
7) SAVE your edit, and run your program by clicking the arrow on the top right corner of Visual Studio window. Your program output will be shown on the OUTPUT tab in the section below.
In this short tutorial, You will learn how to configure a language for Code runner and also a solution for Code runner not supported or undefined errors.
Visual studio code supports almost all programming languages as languages
In my vscode, I create a javascript file and tried to run with an option( Right click + Run code or shortcut Ctrl + Alt+ N), got an error as follows
The problem is that VScode is trying to run a javascript file code runner that does not support these files.
Visual studio code has an inbuilt code runner extension that supports all major programming languages java, javascript, typescript, etc.
Solution to fix code language runner not supported or defined for javascript
First, Go to select language mode in vscode at, Right bottom of
It opens the language mode screen as seen below
Choose either Auto Detect or select language, in this case, javascript
Save the changes.
if the same issue occurred for other languages or file formats, Please make sure that install the extension for languages
and follow the same steps.
Another way is to add javascript with File associations in settings.json
“files. associations”: {
“*.js”: “plaintext”
},
Finally, You can open the terminal and run the below command.
It runs javascript successfully.
Conclusion
In this short article, You learned how to fix code language runner when running javascript code in visual studio code.
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