feat(tsconfig): enable trailing comma support for JSONC (#479)

xiaoxiaojx · web-flow · commit 958d869b48be · 2026-02-28T12:27:11.000+03:00
diff --git a/lib/util/fs.js b/lib/util/fs.js
@@ -44,7 +44,7 @@ async function readJson(fileSystem, jsonFilePath, options = {}) {
 	const jsonText = /** @type {string} */ (buf.toString());
 	// Strip comments to support JSONC (e.g., tsconfig.json with comments)
 	const jsonWithoutComments = stripComments
-		? stripJsonComments(jsonText)
+		? stripJsonComments(jsonText, { trailingCommas: true, whitespace: true })
 		: jsonText;
 	return JSON.parse(jsonWithoutComments);
 }
diff --git a/test/fixtures/tsconfig-paths/jsonc-comments/tsconfig.json b/test/fixtures/tsconfig-paths/jsonc-comments/tsconfig.json
@@ -8,7 +8,7 @@
 			"@components/*": ["${configDir}/src/components/*"],
 			"foo": ["${configDir}/src/mapped/foo"],
 			/* Block comment in paths */
-			"bar/*": ["${configDir}/src/mapped/bar/*"]
+			"bar/*": ["${configDir}/src/mapped/bar/*"],
 		}
 	}
 }

Original file line number	Diff line number	Diff line change
`@@ -44,7 +44,7 @@ async function readJson(fileSystem, jsonFilePath, options = {}) {`
`44`	`44`	`const jsonText = /** @type {string} */ (buf.toString());`
`45`	`45`	`// Strip comments to support JSONC (e.g., tsconfig.json with comments)`
`46`	`46`	`const jsonWithoutComments = stripComments`
`47`		`- ? stripJsonComments(jsonText)`
	`47`	`+ ? stripJsonComments(jsonText, { trailingCommas: true, whitespace: true })`
`48`	`48`	`: jsonText;`
`49`	`49`	`return JSON.parse(jsonWithoutComments);`
`50`	`50`	`}`
Original file line number	Diff line number	Diff line change
`@@ -8,7 +8,7 @@`
`8`	`8`	`"@components/": ["${configDir}/src/components/"],`
`9`	`9`	`"foo": ["${configDir}/src/mapped/foo"],`
`10`	`10`	`/* Block comment in paths */`
`11`		`- "bar/": ["${configDir}/src/mapped/bar/"]`
	`11`	`+ "bar/": ["${configDir}/src/mapped/bar/"],`
`12`	`12`	`}`
`13`	`13`	`}`
`14`	`14`	`}`