1 files changed, 31 insertions, 0 deletions
diff --git a/intl/icu_capi/js/examples/wasm-demo/src/ts/index.ts b/intl/icu_capi/js/examples/wasm-demo/src/ts/index.ts
new file mode 100644
index 0000000000..9a5bed6eb3
--- /dev/null
+++ b/intl/icu_capi/js/examples/wasm-demo/src/ts/index.ts
@@ -0,0 +1,31 @@
+import { FFIError, ICU4XError } from "icu4x";
+
+export type Result<T> =
+  | { ok: true; value: T }
+  | { ok: false; error: FFIError<ICU4XError> };
+
+
+export function Ok<T>(value: T): Result<T> {
+    return { ok: true, value };
+}
+
+export function Err<T>(error: FFIError<ICU4XError>): Result<T> {
+    return { ok: false, error };
+}
+
+// Convert exceptions into a `Result`.
+export function result<T>(fn: () => T): Result<T> {
+    try {
+        return Ok(fn());
+    } catch (e) {
+        return Err(e);
+    }
+}
+
+// Convert a `Result` into an exception.
+export function unwrap<T>(result: Result<T>): T {
+    switch (result.ok) {
+        case true: return result.value;
+        case false: throw result.error;
+    }
+}