setTimeout's params should not be bigint (#2834)

js/timers.ts

@@ -179,6 +179,12 @@ function checkThis(thisArg: unknown): void {
   }
 }
 
+function checkBigInt(n: unknown): void {
+  if (typeof n === "bigint") {
+    throw new TypeError("Cannot convert a BigInt value to a number");
+  }
+}
+
 function setTimer(
   cb: (...args: Args) => void,
   delay: number,
@@ -224,6 +230,7 @@ export function setTimeout(
   delay: number = 0,
   ...args: Args
 ): number {
+  checkBigInt(delay);
   // @ts-ignore
   checkThis(this);
   return setTimer(cb, delay, args, false);
@@ -235,6 +242,7 @@ export function setInterval(
   delay: number = 0,
   ...args: Args
 ): number {
+  checkBigInt(delay);
   // @ts-ignore
   checkThis(this);
   return setTimer(cb, delay, args, true);

js/timers_test.ts

@@ -244,6 +244,21 @@ test(async function clearTimeoutShouldConvertToNumber(): Promise<void> {
   assert(called);
 });
 
+test(function setTimeoutShouldThrowWithBigint(): void {
+  let hasThrown = 0;
+  try {
+    setTimeout((): void => {}, (1n as unknown) as number);
+    hasThrown = 1;
+  } catch (err) {
+    if (err instanceof TypeError) {
+      hasThrown = 2;
+    } else {
+      hasThrown = 3;
+    }
+  }
+  assertEquals(hasThrown, 2);
+});
+
 test(function testFunctionName(): void {
   assertEquals(clearTimeout.name, "clearTimeout");
   assertEquals(clearInterval.name, "clearInterval");