Input

export type myType = | // Comment
  "A";

Config

{}

Oxfmt output

Oxfmt version: latest

export type myType =
  // Comment
  "A";

Oxfmt playground link

https://playground.oxc.rs/?t=formatter&formatterPanels=output%2Cprettier&options=%7B%22run%22%3A%7B%22lint%22%3Afalse%2C%22formatter%22%3Atrue%2C%22transform%22%3Afalse%2C%22isolatedDeclarations%22%3Afalse%2C%22whitespace%22%3Afalse%2C%22mangle%22%3Afalse%2C%22compress%22%3Afalse%2C%22scope%22%3Atrue%2C%22symbol%22%3Atrue%2C%22cfg%22%3Afalse%7D%2C%22parser%22%3A%7B%22extension%22%3A%22ts%22%2C%22allowReturnOutsideFunction%22%3Atrue%2C%22preserveParens%22%3Atrue%2C%22allowV8Intrinsics%22%3Atrue%2C%22semanticErrors%22%3Atrue%7D%2C%22linter%22%3A%7B%7D%2C%22formatter%22%3A%7B%22useTabs%22%3Afalse%2C%22tabWidth%22%3A2%2C%22endOfLine%22%3A%22lf%22%2C%22printWidth%22%3A80%2C%22singleQuote%22%3Afalse%2C%22jsxSingleQuote%22%3Afalse%2C%22quoteProps%22%3A%22as-needed%22%2C%22trailingComma%22%3A%22all%22%2C%22semi%22%3Atrue%2C%22arrowParens%22%3A%22always%22%2C%22bracketSpacing%22%3Atrue%2C%22bracketSameLine%22%3Afalse%2C%22objectWrap%22%3A%22preserve%22%2C%22singleAttributePerLine%22%3Afalse%7D%2C%22transformer%22%3A%7B%22target%22%3A%22es2015%22%2C%22useDefineForClassFields%22%3Atrue%2C%22experimentalDecorators%22%3Atrue%2C%22emitDecoratorMetadata%22%3Atrue%7D%2C%22isolatedDeclarations%22%3A%7B%22stripInternal%22%3Afalse%7D%2C%22codegen%22%3A%7B%22normal%22%3Atrue%2C%22jsdoc%22%3Atrue%2C%22annotation%22%3Atrue%2C%22legal%22%3Atrue%7D%2C%22compress%22%3A%7B%7D%2C%22mangle%22%3A%7B%22topLevel%22%3Atrue%2C%22keepNames%22%3Afalse%7D%2C%22controlFlow%22%3A%7B%22verbose%22%3Afalse%7D%2C%22inject%22%3A%7B%22inject%22%3A%7B%7D%7D%2C%22define%22%3A%7B%22define%22%3A%7B%7D%7D%7D&code=export+type+myType+%3D+%7C+%2F%2F+Comment%0A++%22A%22%3B

Prettier output

Prettier version: 3.8.3

export type myType = // Comment
  "A";

Prettier playground link

https://prettier.io/playground/?version=next#N4Igxg9gdgLgprEAuEcAeAHCAnGACGATwzjwFtCAVY0gXjwB88B6ZvAYQjLIRgB0oePHxABBEQG4QAGhAQMMAJbQAzslABDbNggB3AApaEalBoA2ujYTWyARtg1gA1nBgBlDTwAyiqHGQAZuYqcLIQtgBWcGAwAOoOGMggGNhwIdgAbv52Ds6ubhiOvgDmyDDYAK6hICFkimWV1egk2Io8sOYA8i0aMDj6ECqKStBJCAAmMqiYcK3tMOaUs1BaimmBwdVDUMVmcACKFRDwG2YhshEqaG4le4fH-khBZ9UAjkfw+joYJiAaKgBaPxwcYgqblDSKMwlTjcDRJcxmKbbXZwUQwcqKWwVT6zHx+U7nEAACxgZDMsWJwzShTAcDcxmGigyw0ISTAKhsIAyVQAklBQbA3GBWgpRAK3EQ9oTqilBnB4hpEigUmlZlkphNOgF8Y8QGYAlNfOkYF8NMUyPCnptZIVsOkkkQSCoRYoFFMUr44opxjBicgABwABlkqXeilSZotVueRIWtliPr9yAATLIKiFKBpbCZY00yLYQaDxl4NDsKua4AAxHCWjElBE4iAgAC+LaAA

Additional notes

Very similar to #21399, but this time the comment is on the same line as the pipe.