diff --git a/Cargo.lock b/Cargo.lock
index 1d866d8941..d3f94b4138 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -938,9 +938,9 @@ checksum = "1aaf95b3e5c8f23aa320147307562d361db0ae0d51242340f558153b4eb2439b"
 
 [[package]]
 name = "dyn-clone"
-version = "1.0.19"
+version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1c7a8fb8a9fbf66c1f703fe16184d10ca0ee9d23be5b4436400408ba54a95005"
+checksum = "d0881ea181b1df73ff77ffaaf9c7544ecc11e82fba9b5f27b262a3c73a332555"
 
 [[package]]
 name = "either"
@@ -1255,6 +1255,18 @@ version = "0.31.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "07e28edb80900c19c28f1072f2e8aeca7fa06b23cd4169cefe1af5aa3260783f"
 
+[[package]]
+name = "gloo-timers"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbb143cf96099802033e0d4f4963b19fd2e0b728bcf076cd9cf7f6634f092994"
+dependencies = [
+ "futures-channel",
+ "futures-core",
+ "js-sys",
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "half"
 version = "2.6.0"
@@ -1411,7 +1423,7 @@ dependencies = [
  "libc",
  "percent-encoding",
  "pin-project-lite",
- "socket2 0.6.0",
+ "socket2",
  "tokio",
  "tower-service",
  "tracing",
@@ -1624,9 +1636,9 @@ checksum = "1171693293099992e19cddea4e8b849964e9846f4acee11b3948bcc337be8776"
 
 [[package]]
 name = "libredox"
-version = "0.1.6"
+version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4488594b9328dee448adb906d8b126d9b7deb7cf5c22161ee591610bb1be83c0"
+checksum = "360e552c93fa0e8152ab463bc4c4837fce76a225df11dfaeea66c313de5e61f7"
 dependencies = [
  "bitflags",
  "libc",
@@ -1685,6 +1697,16 @@ version = "2.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "32a282da65faaf38286cf3be983213fcf1d2e2a58700e808f83f4ea9a4804bc0"
 
+[[package]]
+name = "minicov"
+version = "0.3.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f27fe9f1cc3c22e1687f9446c2083c4c5fc7f0bcf1c7a86bdbded14985895b4b"
+dependencies = [
+ "cc",
+ "walkdir",
+]
+
 [[package]]
 name = "miniz_oxide"
 version = "0.8.9"
@@ -2156,9 +2178,9 @@ dependencies = [
 
 [[package]]
 name = "redox_syscall"
-version = "0.5.15"
+version = "0.5.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7e8af0dde094006011e6a740d4879319439489813bd0bcdc7d821beaeeff48ec"
+checksum = "5407465600fb0548f1442edf71dd20683c6ed326200ace4b1ef0763521bb3b77"
 dependencies = [
  "bitflags",
 ]
@@ -2321,9 +2343,9 @@ dependencies = [
 
 [[package]]
 name = "rustc-demangle"
-version = "0.1.25"
+version = "0.1.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "989e6739f80c4ad5b13e0fd7fe89531180375b18520cc8c82080e4dc4035b84f"
+checksum = "56f7d92ca342cea22a06f2121d944b4fd82af56988c270852495420f961d4ace"
 
 [[package]]
 name = "rustc_version"
@@ -2349,9 +2371,9 @@ dependencies = [
 
 [[package]]
 name = "rustls"
-version = "0.23.29"
+version = "0.23.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2491382039b29b9b11ff08b76ff6c97cf287671dbb74f0be44bda389fffe9bd1"
+checksum = "c0ebcbd2f03de0fc1122ad9bb24b127a5a6cd51d72604a3f3c50ac459762b6cc"
 dependencies = [
  "once_cell",
  "rustls-pki-types",
@@ -2680,16 +2702,6 @@ version = "1.15.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "67b1b7a3b5fe4f1376887184045fcf45c69e92af734b7aaddc05fb777b6fbd03"
 
-[[package]]
-name = "socket2"
-version = "0.5.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e22376abed350d73dd1cd119b57ffccad95b4e585a7cda43e286245ce23c0678"
-dependencies = [
- "libc",
- "windows-sys 0.52.0",
-]
-
 [[package]]
 name = "socket2"
 version = "0.6.0"
@@ -2907,9 +2919,9 @@ checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20"
 
 [[package]]
 name = "tokio"
-version = "1.46.1"
+version = "1.47.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0cc3a2344dafbe23a245241fe8b09735b521110d30fcefbbd5feb1797ca35d17"
+checksum = "43864ed400b6043a4757a25c7a64a8efde741aed79a056a2fb348a406701bb35"
 dependencies = [
  "backtrace",
  "bytes",
@@ -2919,9 +2931,9 @@ dependencies = [
  "pin-project-lite",
  "signal-hook-registry",
  "slab",
- "socket2 0.5.10",
+ "socket2",
  "tokio-macros",
- "windows-sys 0.52.0",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -3146,6 +3158,7 @@ dependencies = [
  "dyn-clone",
  "futures",
  "getrandom 0.3.3",
+ "gloo-timers",
  "pin-project",
  "quick-xml",
  "rand 0.9.2",
@@ -3161,6 +3174,8 @@ dependencies = [
  "typespec_macros",
  "url",
  "uuid",
+ "wasm-bindgen-futures",
+ "wasm-bindgen-test",
 ]
 
 [[package]]
@@ -3363,6 +3378,30 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "wasm-bindgen-test"
+version = "0.3.50"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "66c8d5e33ca3b6d9fa3b4676d774c5778031d27a578c2b007f905acf816152c3"
+dependencies = [
+ "js-sys",
+ "minicov",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "wasm-bindgen-test-macro",
+]
+
+[[package]]
+name = "wasm-bindgen-test-macro"
+version = "0.3.50"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "17d5042cc5fa009658f9a7333ef24291b1291a25b6382dd68862a7f3b969f69b"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.104",
+]
+
 [[package]]
 name = "wasm-streams"
 version = "0.4.2"
@@ -3431,6 +3470,12 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
+[[package]]
+name = "windows-link"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5e6ad25900d524eaabdbbb96d20b4311e1e7ae1699af4fb28c17ae66c80d798a"
+
 [[package]]
 name = "windows-sys"
 version = "0.52.0"
@@ -3455,7 +3500,7 @@ version = "0.60.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f2f500e4d28234f72040990ec9d39e3a6b950f9f22d3dba18416c35882612bcb"
 dependencies = [
- "windows-targets 0.53.2",
+ "windows-targets 0.53.3",
 ]
 
 [[package]]
@@ -3476,10 +3521,11 @@ dependencies = [
 
 [[package]]
 name = "windows-targets"
-version = "0.53.2"
+version = "0.53.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c66f69fcc9ce11da9966ddb31a40968cad001c5bedeb5c2b82ede4253ab48aef"
+checksum = "d5fe6031c4041849d7c496a8ded650796e7b6ecc19df1a431c1a363342e5dc91"
 dependencies = [
+ "windows-link",
  "windows_aarch64_gnullvm 0.53.0",
  "windows_aarch64_msvc 0.53.0",
  "windows_i686_gnu 0.53.0",
@@ -3588,9 +3634,9 @@ checksum = "271414315aff87387382ec3d271b52d7ae78726f5d44ac98b4f4030c91880486"
 
 [[package]]
 name = "winnow"
-version = "0.7.11"
+version = "0.7.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "74c7b26e3480b707944fc872477815d29a8e429d2f93a1ce000f5fa84a15cbcd"
+checksum = "f3edebf492c8125044983378ecb5766203ad3b4c2f7a922bd7dd207f6d443e95"
 dependencies = [
  "memchr",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 45abfa0628..136694123b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -89,6 +89,7 @@ fe2o3-amqp-types = { version = "0.14" }
 flate2 = "1.1.0"
 futures = "0.3"
 getrandom = { version = "0.3" }
+gloo-timers = { version = "0.3" }
 hmac = { version = "0.12" }
 litemap = "0.7.4"
 log = "0.4"
@@ -128,6 +129,7 @@ tracing = "0.1.40"
 tracing-subscriber = "0.3"
 url = "2.2"
 uuid = { version = "1.17", features = ["v4"] }
+wasm-bindgen-futures = "0.4"
 zerofrom = "0.1.5"
 zip = { version = "4.0.0", default-features = false, features = ["deflate"] }
 
diff --git a/eng/dict/crates.txt b/eng/dict/crates.txt
index 01bc133f8a..6a2163073c 100644
--- a/eng/dict/crates.txt
+++ b/eng/dict/crates.txt
@@ -32,6 +32,7 @@ fe2o3-amqp-types
 flate2
 futures
 getrandom
+gloo
 hmac
 litemap
 log
diff --git a/sdk/typespec/typespec_client_core/Cargo.toml b/sdk/typespec/typespec_client_core/Cargo.toml
index 7032a61fb6..d5dea44f4a 100644
--- a/sdk/typespec/typespec_client_core/Cargo.toml
+++ b/sdk/typespec/typespec_client_core/Cargo.toml
@@ -16,6 +16,7 @@ base64.workspace = true
 bytes.workspace = true
 dyn-clone.workspace = true
 futures.workspace = true
+gloo-timers = { workspace = true, optional = true }
 pin-project.workspace = true
 quick-xml = { workspace = true, optional = true }
 rand.workspace = true
@@ -30,6 +31,7 @@ typespec = { workspace = true, default-features = false }
 typespec_macros = { workspace = true, optional = true }
 url.workspace = true
 uuid.workspace = true
+wasm-bindgen-futures = { workspace = true, optional = true }
 
 [target.'cfg(not(target_family = "wasm"))'.dependencies]
 tokio = { workspace = true, features = ["macros", "rt-multi-thread", "time"] }
@@ -43,6 +45,9 @@ tokio.workspace = true
 tracing.workspace = true
 tracing-subscriber.workspace = true
 typespec_macros.path = "../typespec_macros"
+wasm-bindgen-test = "0.3"
+getrandom = { version = "0.3" , features = ["wasm_js"]}
+uuid = { version = "1", features = ["v4", "js"] }
 
 [features]
 default = ["http", "json", "reqwest", "reqwest_deflate", "reqwest_gzip"]
@@ -58,6 +63,7 @@ reqwest_rustls = [
 ] # Remove dependency on banned `ring` crate; requires manually configuring crypto provider.
 test = [] # Enables extra tracing including error bodies that may contain PII.
 tokio = ["tokio/fs", "tokio/sync", "tokio/time", "tokio/io-util"]
+wasm-bindgen = ["dep:wasm-bindgen-futures", "gloo-timers/futures"]
 xml = ["dep:quick-xml"]
 decimal = ["dep:rust_decimal"]
 
diff --git a/sdk/typespec/typespec_client_core/src/async_runtime/mod.rs b/sdk/typespec/typespec_client_core/src/async_runtime/mod.rs
index a1e3073bfe..8a6607cfd8 100644
--- a/sdk/typespec/typespec_client_core/src/async_runtime/mod.rs
+++ b/sdk/typespec/typespec_client_core/src/async_runtime/mod.rs
@@ -41,6 +41,9 @@ mod standard_runtime;
 #[cfg(feature = "tokio")]
 mod tokio_runtime;
 
+#[cfg(all(target_arch = "wasm32", feature = "wasm-bindgen"))]
+mod web_runtime;
+
 #[cfg(test)]
 mod tests;
 
@@ -107,7 +110,7 @@ pub trait AsyncRuntime: Send + Sync {
     ///
     fn spawn(&self, f: TaskFuture) -> SpawnedTask;
 
-    fn sleep(&self, duration: Duration) -> Pin<Box<dyn Future<Output = ()> + Send + 'static>>;
+    fn sleep(&self, duration: Duration) -> TaskFuture;
 }
 
 static ASYNC_RUNTIME_IMPLEMENTATION: OnceLock<Arc<dyn AsyncRuntime>> = OnceLock::new();
@@ -189,12 +192,16 @@ pub fn set_async_runtime(runtime: Arc<dyn AsyncRuntime>) -> crate::Result<()> {
 }
 
 fn create_async_runtime() -> Arc<dyn AsyncRuntime> {
-    #[cfg(not(feature = "tokio"))]
+    #[cfg(all(target_arch = "wasm32", feature = "wasm-bindgen"))]
     {
-        Arc::new(standard_runtime::StdRuntime)
+        Arc::new(web_runtime::WasmBindgenRuntime) as Arc<dyn AsyncRuntime>
     }
     #[cfg(feature = "tokio")]
     {
         Arc::new(tokio_runtime::TokioRuntime) as Arc<dyn AsyncRuntime>
     }
+    #[cfg(not(any(feature = "tokio", feature = "wasm-bindgen")))]
+    {
+        Arc::new(standard_runtime::StdRuntime)
+    }
 }
diff --git a/sdk/typespec/typespec_client_core/src/async_runtime/standard_runtime.rs b/sdk/typespec/typespec_client_core/src/async_runtime/standard_runtime.rs
index 739d85f1f8..2d590b57e5 100644
--- a/sdk/typespec/typespec_client_core/src/async_runtime/standard_runtime.rs
+++ b/sdk/typespec/typespec_client_core/src/async_runtime/standard_runtime.rs
@@ -14,6 +14,7 @@ use std::{
     task::{Context, Poll, Waker},
     thread,
 };
+#[cfg(not(target_arch = "wasm32"))]
 use std::{future::Future, pin::Pin};
 #[cfg(not(target_arch = "wasm32"))]
 use tracing::debug;
@@ -150,7 +151,7 @@ impl AsyncRuntime for StdRuntime {
     /// Uses a simple thread based implementation for sleep. A more efficient
     /// implementation is available by using the `tokio` crate feature.
     #[cfg_attr(target_arch = "wasm32", allow(unused_variables))]
-    fn sleep(&self, duration: Duration) -> Pin<Box<dyn Future<Output = ()> + Send + 'static>> {
+    fn sleep(&self, duration: Duration) -> TaskFuture {
         #[cfg(target_arch = "wasm32")]
         {
             panic!("sleep is not supported on wasm32")
diff --git a/sdk/typespec/typespec_client_core/src/async_runtime/tests.rs b/sdk/typespec/typespec_client_core/src/async_runtime/tests.rs
index c1c1d71008..0dfc151cc6 100644
--- a/sdk/typespec/typespec_client_core/src/async_runtime/tests.rs
+++ b/sdk/typespec/typespec_client_core/src/async_runtime/tests.rs
@@ -3,10 +3,12 @@
 
 use super::*;
 use crate::time::Duration;
-use futures::FutureExt;
 use std::sync::{Arc, Mutex};
 
-#[cfg(not(feature = "tokio"))]
+#[cfg(not(feature = "wasm-bindgen"))]
+use futures::FutureExt;
+
+#[cfg(not(any(feature = "tokio", feature = "wasm-bindgen")))]
 #[test]
 fn test_task_spawner_execution() {
     let runtime = get_async_runtime();
@@ -124,6 +126,7 @@ async fn tokio_task_execution() {
 
 // When the "tokio" feature is enabled, the azure_core::sleep::sleep function uses tokio::time::sleep which requires a tokio runtime.
 // When the "tokio" feature is not enabled, it uses std::thread::sleep which does not require a tokio runtime.
+#[cfg(not(target_arch = "wasm32"))]
 #[test]
 fn std_specific_handling() {
     let spawner = Arc::new(standard_runtime::StdRuntime);
@@ -144,6 +147,7 @@ fn std_specific_handling() {
 }
 
 #[test]
+#[cfg(not(target_arch = "wasm32"))]
 fn std_multiple_tasks() {
     let spawner = Arc::new(standard_runtime::StdRuntime);
     let counter = Arc::new(Mutex::new(0));
@@ -172,7 +176,7 @@ fn std_multiple_tasks() {
 
 // When the "tokio" feature is enabled, the azure_core::sleep::sleep function uses tokio::time::sleep which requires a tokio runtime.
 // When the "tokio" feature is not enabled, it uses std::thread::sleep which does not require a tokio runtime.
-#[cfg(not(feature = "tokio"))]
+#[cfg(not(any(feature = "tokio", feature = "wasm-bindgen")))]
 #[test]
 fn std_task_execution() {
     let runtime = Arc::new(standard_runtime::StdRuntime);
@@ -199,7 +203,7 @@ fn std_task_execution() {
 // Basic test that launches 10k futures and waits for them to complete:
 // it has a high chance of failing if there is a race condition in the sleep method;
 // otherwise, it runs quickly.
-#[cfg(not(feature = "tokio"))]
+#[cfg(not(any(feature = "tokio", feature = "wasm-bindgen")))]
 #[tokio::test]
 async fn test_timeout() {
     use super::*;
@@ -226,6 +230,7 @@ async fn test_timeout() {
     }
 }
 
+#[cfg(not(target_arch = "wasm32"))]
 #[tokio::test]
 async fn test_sleep() {
     let runtime = get_async_runtime();
@@ -235,6 +240,37 @@ async fn test_sleep() {
     assert!(elapsed >= Duration::milliseconds(100));
 }
 
+#[cfg(feature = "wasm-bindgen")]
+use wasm_bindgen_test::*;
+
+#[cfg(feature = "wasm-bindgen")]
+#[wasm_bindgen_test]
+async fn test_sleep() {
+    let runtime = get_async_runtime();
+    runtime.sleep(Duration::milliseconds(100)).await;
+}
+
+#[cfg(feature = "wasm-bindgen")]
+#[wasm_bindgen_test]
+async fn wasm_bindgen_task_execution() {
+    let spawner = Arc::new(web_runtime::WasmBindgenRuntime);
+    let result = Arc::new(Mutex::new(false));
+    let result_clone = Arc::clone(&result);
+
+    let handle = spawner.spawn(Box::pin(async move {
+        // Simulate some work
+        crate::sleep::sleep(Duration::milliseconds(50)).await;
+        let mut value = result_clone.lock().unwrap();
+        *value = true;
+    }));
+
+    // Wait for task completion
+    handle.await.expect("Task should complete successfully");
+
+    // Verify the task executed
+    assert!(*result.lock().unwrap());
+}
+
 #[test]
 fn test_get_runtime() {
     // Ensure that the runtime can be retrieved without panicking
@@ -248,7 +284,7 @@ impl AsyncRuntime for TestRuntime {
         unimplemented!("TestRuntime does not support spawning tasks");
     }
 
-    fn sleep(&self, _duration: Duration) -> Pin<Box<dyn Future<Output = ()> + Send + 'static>> {
+    fn sleep(&self, _duration: Duration) -> TaskFuture {
         unimplemented!("TestRuntime does not support sleeping");
     }
 }
diff --git a/sdk/typespec/typespec_client_core/src/async_runtime/web_runtime.rs b/sdk/typespec/typespec_client_core/src/async_runtime/web_runtime.rs
new file mode 100644
index 0000000000..7986be5d6a
--- /dev/null
+++ b/sdk/typespec/typespec_client_core/src/async_runtime/web_runtime.rs
@@ -0,0 +1,35 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+use super::{AsyncRuntime, SpawnedTask, TaskFuture};
+use crate::time::Duration;
+use futures::channel::oneshot;
+
+/// An [`AsyncRuntime`] using `wasm-bindgen-futures` for task spawning and `gloo-timers` for sleep functionality.
+pub(crate) struct WasmBindgenRuntime;
+
+impl AsyncRuntime for WasmBindgenRuntime {
+    fn spawn(&self, f: TaskFuture) -> SpawnedTask {
+        let (tx, rx) = oneshot::channel();
+
+        wasm_bindgen_futures::spawn_local(async move {
+            let result = f.await;
+            let _ = tx.send(result);
+        });
+
+        Box::pin(async {
+            rx.await
+                .map_err(|e| Box::new(e) as Box<dyn std::error::Error>)
+        })
+    }
+
+    fn sleep(&self, duration: Duration) -> TaskFuture {
+        Box::pin(async move {
+            if let Ok(d) = duration.try_into() {
+                gloo_timers::future::sleep(d).await;
+            } else {
+                // This means the duration is negative, don't sleep at all.
+            }
+        })
+    }
+}
diff --git a/sdk/typespec/typespec_client_core/src/http/policies/retry/mod.rs b/sdk/typespec/typespec_client_core/src/http/policies/retry/mod.rs
index f50a14fdf0..8710a693de 100644
--- a/sdk/typespec/typespec_client_core/src/http/policies/retry/mod.rs
+++ b/sdk/typespec/typespec_client_core/src/http/policies/retry/mod.rs
@@ -89,7 +89,8 @@ impl Deref for RetryPolicyCount {
 ///
 /// `wait` can be implemented in more complex cases where a simple test of time
 /// is not enough.
-#[async_trait]
+#[cfg_attr(target_arch = "wasm32", async_trait(?Send))]
+#[cfg_attr(not(target_arch = "wasm32"), async_trait)]
 pub trait RetryPolicy: std::fmt::Debug + Send + Sync {
     /// Determine if no more retries should be performed.
     ///