fix: parsing decimals and scientific notation

unjs · Oct 24, 2023 · 701d67a · 701d67a
1 parent 3721051
commit 701d67a
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Showing 2 changed files with 19 additions and 1 deletion.
diff --git a/src/index.ts b/src/index.ts
@@ -5,7 +5,7 @@ const suspectProtoRx =
 const suspectConstructorRx =
   /"(?:c|\\u0063)(?:o|\\u006[Ff])(?:n|\\u006[Ee])(?:s|\\u0073)(?:t|\\u0074)(?:r|\\u0072)(?:u|\\u0075)(?:c|\\u0063)(?:t|\\u0074)(?:o|\\u006[Ff])(?:r|\\u0072)"\s*:/;
 
-const JsonSigRx = /^\s*["[{]|^\s*-?\d[\d.]{0,14}\s*$/;
+const JsonSigRx = /^\s*["[{]|^\s*-?\d{1,16}(\.\d{1,17})?([Ee][+-]?\d+)?\s*$/;
 
 function jsonParseTransform(key: string, value: any): any {
   if (

diff --git a/test/index.test.ts b/test/index.test.ts
@@ -178,4 +178,22 @@ describe("destr", () => {
       );
     }
   });
+
+  it("parses number", () => {
+    const testCases: Array<{ input: string; output: unknown }> = [
+      { input: "9", output: 9 },
+      { input: "-9", output: -9 },
+      { input: "0.30000000000000004", output: 0.300_000_000_000_000_04 },
+      { input: "9007199254740991", output: 9_007_199_254_740_991 },
+      { input: "9e2", output: 900 },
+      { input: "9e+2", output: 900 },
+      { input: "9e-2", output: 0.09 },
+      { input: "9.9e10000", output: Number.POSITIVE_INFINITY },
+      { input: "9.9e-10000", output: 0 },
+    ];
+
+    for (const testCase of testCases) {
+      expect(destr(testCase.input)).toStrictEqual(testCase.output);
+    }
+  });
 });