Solving Error in modern -> ESLint: Expected linebreaks to be ‘LF’ but found ‘CRLF’. (linebreak-style)
Hi dear Anton,
I think the line shown as below should be added in .eslintrc.js file to get rid of errors:
. rules: < . 'linebreak-style': ['error', process.env.NODE_ENV === 'prod' ? 'unix' : 'windows'], >, . Anton Tananaev a year ago
Not sure I understand. Are you getting an error trying to build it?
Rhamean a year ago
There is nothing wrong with build or «npm start», but I see tens of the «Errors» that I mentioned, when I open any «*.js» files from modern.
I could fix it with adding the line I just commented above, into «.eslintrc.js»
I am working in windows 10, maybe it accurses for not working in linux or so.
I hope I didn’t miss anything.
Anton Tananaev a year ago
Where do you see the errors exactly?
Rhamean a year ago
The errors come for each lines of any .js files in modern app.
I use IntellijIdea and it shows me the errors in problems tap.
for example I can see 43 errors from App.js while the app is running very well !
that is confusing for me but I am not sure what is going on.
Thanks and sorry
Anton Tananaev a year ago
Sounds like you have an issues with your IntelliJ configuration.
Rhamean a year ago
There must be, Sir.
Thank you so much for helping me.
Wishing you the best for every step in your endeavors and good luck.
Anton Tananaev a year ago
I would recommend using VS Code for the modern app development. Much better experience.
miguel lorenzo gerez 8 months ago
The Rhamean solution works for me, I am using Windows and Visual Studio Code.
Guilherme Crocetti 5 months ago
The Rhamean solution works for me as well! using win and vscode
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Expected linebreaks to be ‘LF’ but found ‘CRLF’ linebreak-style
When using eslint in the gulp project i have encountered a problem with error like this
Expected linebreaks to be ‘LF’ but found ‘CRLF’ linebreak-style and I am using Windows environment for the running gulp and the entire error log is given below
Kiran (master *) Lesson 4 $ gulp Using gulpfile c:\Users\Sai\Desktop\web-build-tools\4\ gulpfile.js Starting 'styles'. Finished 'styles' after 17 ms Starting 'lint'. 'lint' errored after 1.14 s ESLintError in plugin 'gulp-eslint' sage: Expected linebreaks to be 'LF' but found 'CRLF'. ails: fileName: c:\Users\Sai\Desktop\web-build-tools\4\js\extra.js $>Users\Sai\Desktop\web-build-tools\4\js\extra.js error Expected linebreaks to be 'LF' but found 'CRLF' linebreak-style
I have also including extra.js file as the error indicating possible mistake.
function getWindowHeight() < return window.innerHeight; >getWindowHeight(); asked Jun 15, 2016 at 4:55
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23 Answers 23
Check if you have the linebreak-style rule configure as below either in your .eslintrc or in source code:
/*eslint linebreak-style: ["error", "unix"]*/ Since you’re working on Windows, you may want to use this rule instead:
/*eslint linebreak-style: ["error", "windows"]*/ Refer to the documentation of linebreak-style :
When developing with a lot of people all having different editors, VCS applications and operating systems it may occur that different line endings are written by either of the mentioned (might especially happen when using the windows and mac versions of SourceTree together).
The linebreaks (new lines) used in windows operating system are usually carriage returns (CR) followed by a line feed (LF) making it a carriage return line feed (CRLF) whereas Linux and Unix use a simple line feed (LF). The corresponding control sequences are «\n» (for LF) and «\r\n» for (CRLF).
This is a rule that is automatically fixable. The —fix option on the command line automatically fixes problems reported by this rule.
But if you wish to retain CRLF line-endings in your code (as you’re working on Windows) do not use the fix option.
Fixing expected linebreaks to be ‘LF’ but found ‘CRLF’ in VSCode 2023
How to Get Consistent Line Breaks in VS Code (LF vs CRLF)
3 min read
Yeah! I know. It sucks! A friend of mine went to the extent of installing Windows Subsystem for Linux (WSL) and running VSCode from within it to get rid of this issue.
Solution
If you don’t have a folder .vscode in your root directory, create it. Add a file called settings.json inside this folder and place the following content.
"files.eol": "\n"
>
If you already have a settings.json file, add «files.eol»: «\n» as the last entry of your file (the order doesn’t matter).
Especially if you or your team use Windows to code, double-check check the .vscode folder is not listed in your .gitignore. This is a good strategy to share common settings across teams and make sure code style will be preserved.
Explanation
CRLF and LF are end-of-line (EOL) characters used in text files. CRLF is two characters (carriage return and line feed): \r\n ; and LF is one character (line feed): \n .
The reason for using different end-of-line (EOL) characters in different operating systems can be traced back to the historical evolution of these systems.
Windows uses the Carriage Return (CR) and Line Feed (LF) characters together as the EOL sequence. This is because early computer systems used mechanical teletypewriters that required both CR and LF to move the print head back to the left margin and advance the paper to the next line.
Unix-based systems, on the other hand, including Linux and macOS, use only the Line Feed (LF) character as the EOL sequence — Unix was influenced by the use of electronic typewriters, which only required the LF character to move to the next line.
Also, if you’ve installed ESLint using npm init @eslint/config and you’ve chosen to answer questions about your style in the CLI, you were prompted with this question:
When you select Unix , you’re choosing LF as your EOL sequence. If you select Windows you are setting CLRF as your EOL sequence. In this example, I selected Unix, and within my .eslintrc.json file, I can see:
This is why the better strategy is to commit the .vscode folder with the settings we’ve seen before.
This will prevent pull requests with lots of ESLint fixings that don’t reflect what the engineer is really working on.
Also, if you type ctrl + , in your VSCode and then type in eol in the search settings, you’ll see this section “Files: Eol”.
If you select \n this means LF. If you select \r\n , you’re choosing CRLF. This change by itself should fix the problem. The proposed solution fixes it for everyone sharing the same repository using VSCode.
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How to remove «ESLint:(linebreak-style)Expected linebreaks to be ‘LF’ but found ‘CRLF»
I am facing this issue on WebIDE that when I open existing projects, the XML and JS files show the following error.
ESLint:(linebreak-style)Expected linebreaks to be ‘LF’ but found ‘CRLF
However, when I create any project, I don’t this error in the pages.
Could you please let me know what settings are required to avoid this error and resolve the same in existing projects on WebIde.