stylelint for less - The "syntax" option is no longer available

[PlayApple]

stylelint --fix "src/**/*.less" --syntax less
Error: The "syntax" option is no longer available. You should install an appropriate syntax, e.g. postcss-scss, and use the "customSyntax" option

"lint:style": "stylelint --fix \"src/**/*.less\" --syntax less",

How to use customSyntax to fixed it? Thanks

[gwsbhqt]

I have the same problem.

[jeddy3]

See the migration guide.

You should install postcss-less:

npm install --save-dev postcss-less

And then either use the --custom-syntax flag:

"lint:style": "stylelint --fix \"src/**/*.less\" --custom-syntax postcss-less"

or use the customSyntax configuration object property:

{
  "customSyntax": "postcss-less",
  "rules": {
    ..
  }
}

You can also raise an issue in the 3rd party stylelint-config-recommended-less shared config to see if they'll be willing to bundle the postcss-less syntax in the config.

[PlayApple]

Thank you for your help. I encountered new problems after performing the operation.

TypeError: this.getPosition is not a function

"lint:style": "stylelint --fix "src/**/*.less" --custom-syntax postcss-less"

TypeError: this.getPosition is not a function
at LessParser.inlineComment (/web/node_modules/postcss-less/lib/LessParser.js:71:28)
at LessParser.isInlineComment (/web/node_modules/postcss-less/lib/nodes/inline-comment.js:37:12)
at LessParser.other (/web/node_modules/postcss-less/lib/LessParser.js:156:36)
at LessParser.parse (/web/node_modules/postcss/lib/parser.js:75:16)
at parse (/web/node_modules/postcss-less/lib/index.js:11:12)
at new LazyResult (/web/node_modules/stylelint/node_modules/postcss/lib/lazy-result.js:133:16)
at getPostcssResult (/web/node_modules/stylelint/lib/getPostcssResult.js:77:30)
at async lintSource (/web/node_modules/stylelint/lib/lintSource.js:76:4)
at async /web/node_modules/stylelint/lib/standalone.js:218:27
at async Promise.all (index 0)

[ybiquitous]

@PlayApple Can you reproduce the error on the demo? (please share the demo URL)

[ybiquitous]

Ref: #5666

[meatnordrink]

For anyone that encounters this later, the solution is

npm i --save-dev postcss@8

stylelint-scss/stylelint-config-standard-scss#5 (comment)