fix: respect closest closing brackets (#14)

Author: vanska

.changeset/popular-donkeys-grin.md

@@ -0,0 +1,5 @@
+---
+"typed-string-interpolation": patch
+---
+
+fix: respect closest closing brackets (#14)

README.md

@@ -95,7 +95,7 @@ stringInterpolation(str, variables, options)
 ```ts
 type Options = {
   raw?: boolean // default: false
-  pattern?: RegExp // default: /\{{([^{]+)}}/g
+  pattern?: RegExp // default: /\{\{([^}]+)\}\}/g
   sanity?: boolean // default: true
 }
 ```

src/__tests__/stringInterpolation.test.ts

@@ -133,4 +133,11 @@ describe("stringInterpolation()", () => {
       stringInterpolation("Hello {{world}}", {} as any, { sanity: false }),
     ).toStrictEqual(["Hello ", undefined])
   })
+  test("Respect the closest closing brackets", () => {
+    expect(
+      stringInterpolation('{"someKey":{"anotherKey":"{{valueToChange}}"}}', {
+        valueToChange: 10,
+      }),
+    ).toBe('{"someKey":{"anotherKey":"10"}}')
+  })
 })

src/index.ts

@@ -32,7 +32,7 @@ export function stringInterpolation<
   string: string,
   variables: Record<PropertyKey, VariableValue>,
   {
-    pattern = /\{{([^{]+)}}/g,
+    pattern = /\{\{([^}]+)\}\}/g,
     sanity = true,
     raw = false,
   }: StringInterpolationOptions<OptionRaw> = {},