1 files changed, 30 insertions, 0 deletions
diff --git a/src/js/shared.ts b/src/js/shared.ts
new file mode 100644
index 000000000..1e3da7d51
--- /dev/null
+++ b/src/js/shared.ts
@@ -0,0 +1,30 @@
+export class NotImplementedError extends Error {
+  code: string;
+  constructor(feature: string, issue?: number) {
+    super(
+      feature +
+        " is not yet implemented in Bun." +
+        (issue ? " Track the status & thumbs up the issue: https://github.com/oven-sh/bun/issues/" + issue : ""),
+    );
+    this.name = "NotImplementedError";
+    this.code = "ERR_NOT_IMPLEMENTED";
+
+    // in the definition so that it isn't bundled unless used
+    hideFromStack(NotImplementedError);
+  }
+}
+
+export function throwNotImplemented(feature: string, issue?: number): never {
+  // in the definition so that it isn't bundled unless used
+  hideFromStack(throwNotImplemented);
+
+  throw new NotImplementedError(feature, issue);
+}
+
+export function hideFromStack(...fns) {
+  for (const fn of fns) {
+    Object.defineProperty(fn, "name", {
+      value: "::bunternal::",
+    });
+  }
+}