fix: stringify key identifier starting with number literal (#86)

unjs · Mar 8, 2024 · b8583d4 · b8583d4
1 parent 0e0cc7a
commit b8583d4
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Showing 2 changed files with 5 additions and 1 deletion.
diff --git a/src/utils.ts b/src/utils.ts
@@ -15,7 +15,7 @@ export function wrapInDelimiters(
   );
 }
 
-const VALID_IDENTIFIER_RE = /^[$_]?\w*$/;
+const VALID_IDENTIFIER_RE = /^[$_]?([A-Z_a-z]\w*|\d)$/;
 
 export function genObjectKey(key: string) {
   return VALID_IDENTIFIER_RE.test(key) ? key : genString(key);

diff --git a/test/index.test.ts b/test/index.test.ts
@@ -118,6 +118,8 @@ const genObjectFromRawTests = [
       1: "undefined",
       2: true,
       3: "true",
+      "2xs": true,
+      xs2: true,
       "obj 1": '{ literal: () => "test" }',
       "obj 2": { nested: { foo: '"bar"' } },
       arr: ["1", "2", "3"],
@@ -130,6 +132,8 @@ const genObjectFromRawTests = [
       "  a: null,",
       "  b: null,",
       "  c: undefined,",
+      '  "2xs": true,',
+      "  xs2: true,",
       '  "obj 1": { literal: () => "test" },',
       '  "obj 2": {',
       "    nested: {",