2 files changed, 16 insertions, 20 deletions

diff --git a/runtime/js/12_io.js b/runtime/js/12_io.js
index 1dd162965..213e0a1ee 100644
--- a/runtime/js/12_io.js
+++ b/runtime/js/12_io.js
@@ -7,7 +7,6 @@
 
 ((window) => {
   const core = window.Deno.core;
-  const { DOMException } = window.__bootstrap.domException;
   const {
     Uint8Array,
     ArrayPrototypePush,
@@ -123,7 +122,8 @@
   async function readAllInner(r, options) {
     const buffers = [];
     const signal = options?.signal ?? null;
-    while (!signal?.aborted) {
+    while (true) {
+      signal?.throwIfAborted();
       const buf = new Uint8Array(READ_PER_ITER);
       const read = await r.read(buf);
       if (typeof read == "number") {
@@ -132,9 +132,7 @@
         break;
       }
     }
-    if (signal?.aborted) {
-      throw new DOMException("The read operation was aborted.", "AbortError");
-    }
+    signal?.throwIfAborted();
 
     return concatBuffers(buffers);
   }
@@ -200,7 +198,8 @@
     const buf = new Uint8Array(size + 1); // 1B to detect extended files
     let cursor = 0;
     const signal = options?.signal ?? null;
-    while (!signal?.aborted && cursor < size) {
+    while (cursor < size) {
+      signal?.throwIfAborted();
       const sliceEnd = MathMin(size + 1, cursor + READ_PER_ITER);
       const slice = buf.subarray(cursor, sliceEnd);
       const read = await r.read(slice);
@@ -210,9 +209,7 @@
         break;
       }
     }
-    if (signal?.aborted) {
-      throw new DOMException("The read operation was aborted.", "AbortError");
-    }
+    signal?.throwIfAborted();
 
     // Handle truncated or extended files during read
     if (cursor > size) {
diff --git a/runtime/js/40_write_file.js b/runtime/js/40_write_file.js
index 6ced4e066..bb3f91789 100644
--- a/runtime/js/40_write_file.js
+++ b/runtime/js/40_write_file.js
@@ -13,9 +13,7 @@
     data,
     options = {},
   ) {
-    if (options?.signal?.aborted) {
-      throw new DOMException("The write operation was aborted.", "AbortError");
-    }
+    options.signal?.throwIfAborted();
     if (options.create !== undefined) {
       const create = !!options.create;
       if (!create) {
@@ -73,14 +71,15 @@
 
     const signal = options?.signal ?? null;
     let nwritten = 0;
-    while (!signal?.aborted && nwritten < data.length) {
-      nwritten += await file.write(TypedArrayPrototypeSubarray(data, nwritten));
-    }
-
-    file.close();
-
-    if (signal?.aborted) {
-      throw new DOMException("The write operation was aborted.", "AbortError");
+    try {
+      while (nwritten < data.length) {
+        signal?.throwIfAborted();
+        nwritten += await file.write(
+          TypedArrayPrototypeSubarray(data, nwritten),
+        );
+      }
+    } finally {
+      file.close();
     }
   }