LESS .media-width mixin accepts double and single quotes for client-side compilation, only single quotes for server compilation

[edward-simpson]

Preconditions (*)

1. Tested in 2.3.7

Steps to reproduce (*)

1. Create a LESS file to get compiled into CSS
2. Add two media queries, using one of each of the following:
   .media-width(@extremum, @break) when (@extremum = "min") and (@break = @screen__m) {

and

.media-width(@extremum, @break) when (@extremum = 'min') and (@break = @screen__m) {

3. Compile using grunt
4. Deploy to server using setup:static-content:deploy

Expected result (*)

1. Both methods of compilation should achieve the same result

Actual result (*)

1. For server side compilation, only the latter ('min', using single quotes) compiles successfully

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• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
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• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

[m2-assistant]

Hi @edward-simpson. Thank you for your report.
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[m2-assistant]

Hi @engcom-Lima. Thank you for working on this issue.
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[engcom-Lima]

Hi @edward-simpson,

Thank you for reporting the issue.

However, this issue is duplicate to #24929 and was fixed by #31793. So we are marking this as duplicate and closing this one. You can try upgrading Magento to latest version since there were some version upgrades also to lessjs on PR #31618.

Feel free to raise a fresh ticket or re-open this ticket if you face this issue on the latest version as well.

Thanks