2 files changed, 12 insertions, 8 deletions
diff --git a/runtime/js/40_tty.js b/runtime/js/40_tty.js
index e94fc0374..97e35e0c3 100644
--- a/runtime/js/40_tty.js
+++ b/runtime/js/40_tty.js
@@ -1,9 +1,9 @@
 // Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
-import { core, primordials } from "ext:core/mod.js";
+import { core, internals, primordials } from "ext:core/mod.js";
 const {
   op_console_size,
-  op_isatty,
-} = core.ensureFastOps();
+  op_is_terminal,
+} = core.ensureFastOps(true);
 const {
   Uint32Array,
 } = primordials;
@@ -16,7 +16,12 @@ function consoleSize() {
 }
 
 function isatty(rid) {
-  return op_isatty(rid);
+  internals.warnOnDeprecatedApi(
+    "Deno.isatty()",
+    new Error().stack,
+    "Use `stdStream.isTerminal()` instead.",
+  );
+  return op_is_terminal(rid);
 }
 
 export { consoleSize, isatty };
diff --git a/runtime/js/41_prompt.js b/runtime/js/41_prompt.js
index fce1ac9ac..d0e065538 100644
--- a/runtime/js/41_prompt.js
+++ b/runtime/js/41_prompt.js
@@ -9,14 +9,13 @@ const {
   Uint8Array,
 } = primordials;
 
-import { isatty } from "ext:runtime/40_tty.js";
 import { stdin } from "ext:deno_io/12_io.js";
 
 const LF = StringPrototypeCharCodeAt("\n", 0);
 const CR = StringPrototypeCharCodeAt("\r", 0);
 
 function alert(message = "Alert") {
-  if (!isatty(stdin.rid)) {
+  if (!stdin.isTerminal()) {
     return;
   }
 
@@ -26,7 +25,7 @@ function alert(message = "Alert") {
 }
 
 function confirm(message = "Confirm") {
-  if (!isatty(stdin.rid)) {
+  if (!stdin.isTerminal()) {
     return false;
   }
 
@@ -40,7 +39,7 @@ function confirm(message = "Confirm") {
 function prompt(message = "Prompt", defaultValue) {
   defaultValue ??= "";
 
-  if (!isatty(stdin.rid)) {
+  if (!stdin.isTerminal()) {
     return null;
   }