Fix template string escaping (#60303)

microsoft · Oct 21, 2024 · e6ef279 · e6ef279
1 parent df9d165
commit e6ef279
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Showing 3 changed files with 11 additions and 1 deletion.
diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
@@ -6064,7 +6064,7 @@ export function hasInvalidEscape(template: TemplateLiteral): boolean {
 const doubleQuoteEscapedCharsRegExp = /[\\"\u0000-\u001f\u2028\u2029\u0085]/g;
 const singleQuoteEscapedCharsRegExp = /[\\'\u0000-\u001f\u2028\u2029\u0085]/g;
 // Template strings preserve simple LF newlines, still encode CRLF (or CR)
-const backtickQuoteEscapedCharsRegExp = /\r\n|[\\`\u0000-\u001f\u2028\u2029\u0085]/g;
+const backtickQuoteEscapedCharsRegExp = /\r\n|[\\`\u0000-\u0009\u000b-\u001f\u2028\u2029\u0085]/g;
 const escapedCharsMap = new Map(Object.entries({
     "\t": "\\t",
     "\v": "\\v",

diff --git a/src/testRunner/unittests/printer.ts b/src/testRunner/unittests/printer.ts
@@ -358,5 +358,13 @@ describe("unittests:: PrinterAPI", () => {
                 ),
                 ts.createSourceFile("source.ts", "", ts.ScriptTarget.ES2015),
             ));
+
+        // https://github.com/microsoft/TypeScript/issues/59150
+        printsCorrectly("template string", {}, printer =>
+            printer.printNode(
+                ts.EmitHint.Unspecified,
+                ts.factory.createNoSubstitutionTemplateLiteral("\n"),
+                ts.createSourceFile("source.ts", "", ts.ScriptTarget.ESNext),
+            ));
     });
 });
diff --git a/tests/baselines/reference/printerApi/printsNodeCorrectly.template string.js b/tests/baselines/reference/printerApi/printsNodeCorrectly.template string.js
@@ -0,0 +1,2 @@
+`
+`