diff --git a/crates/backend/src/codegen.rs b/crates/backend/src/codegen.rs
index 89a69e02..7bfbb2fb 100644
--- a/crates/backend/src/codegen.rs
+++ b/crates/backend/src/codegen.rs
@@ -844,6 +844,18 @@ impl ToTokens for ast::ImportEnum {
                 }
             }
 
+            #[allow(clippy::all)]
+            impl ::wasm_bindgen::convert::OptionIntoWasmAbi for #name {
+                #[inline]
+                fn none() -> Self::Abi { Object::none() }
+            }
+
+            #[allow(clippy::all)]
+            impl ::wasm_bindgen::convert::OptionFromWasmAbi for #name {
+                #[inline]
+                fn is_none(abi: &Self::Abi) -> bool { Object::is_none(abi) }
+            }
+
             #[allow(clippy::all)]
             impl From<#name> for ::wasm_bindgen::JsValue {
                 fn from(obj: #name) -> ::wasm_bindgen::JsValue {
diff --git a/crates/web-sys/Cargo.toml b/crates/web-sys/Cargo.toml
index 5956f168..931bb2b5 100644
--- a/crates/web-sys/Cargo.toml
+++ b/crates/web-sys/Cargo.toml
@@ -814,6 +814,9 @@ RtcRtpSender = []
 RtcRtpSourceEntry = []
 RtcRtpSourceEntryType = []
 RtcRtpSynchronizationSource = []
+RtcRtpTransceiver = []
+RtcRtpTransceiverDirection = []
+RtcRtpTransceiverInit = []
 RtcRtxParameters = []
 RtcSdpType = []
 RtcSessionDescription = []
@@ -826,6 +829,7 @@ RtcStatsReport = []
 RtcStatsReportInternal = []
 RtcStatsType = []
 RtcTrackEvent = []
+RtcTrackEventInit = []
 RtcTransportStats = []
 RtcdtmfSender = []
 RtcdtmfToneChangeEvent = []
diff --git a/crates/web-sys/tests/wasm/main.rs b/crates/web-sys/tests/wasm/main.rs
index d4c01b8d..f27d6af7 100644
--- a/crates/web-sys/tests/wasm/main.rs
+++ b/crates/web-sys/tests/wasm/main.rs
@@ -48,6 +48,7 @@ pub mod pre_element;
 pub mod progress_element;
 pub mod quote_element;
 pub mod response;
+pub mod rtc_rtp_transceiver_direction;
 pub mod script_element;
 pub mod select_element;
 pub mod slot_element;
diff --git a/crates/web-sys/tests/wasm/rtc_rtp_transceiver_direction.rs b/crates/web-sys/tests/wasm/rtc_rtp_transceiver_direction.rs
new file mode 100644
index 00000000..632e0c23
--- /dev/null
+++ b/crates/web-sys/tests/wasm/rtc_rtp_transceiver_direction.rs
@@ -0,0 +1,87 @@
+use wasm_bindgen::{prelude::*, JsCast};
+use wasm_bindgen_futures::JsFuture;
+use wasm_bindgen_test::*;
+
+use futures::Future;
+
+use web_sys::{
+    RtcPeerConnection, RtcRtpTransceiver, RtcRtpTransceiverDirection, RtcRtpTransceiverInit,
+    RtcSessionDescriptionInit,
+};
+
+
+#[wasm_bindgen(inline_js = "export function is_unified_avail() { return Object.keys(RTCRtpTransceiver.prototype).indexOf('currentDirection')>-1; }")]
+extern "C" {
+    /// Available in FF since forever, in Chrome since 72, in Safari since 12.1
+    fn is_unified_avail() -> bool;
+}
+
+#[wasm_bindgen_test(async)]
+fn rtc_rtp_transceiver_direction() -> impl Future<Item = (), Error = JsValue> {
+
+    if !is_unified_avail(){
+        Ok(())
+    }
+
+    let mut tr_init: RtcRtpTransceiverInit = RtcRtpTransceiverInit::new();
+
+    let pc1: RtcPeerConnection = RtcPeerConnection::new().unwrap();
+
+    let tr1: RtcRtpTransceiver = pc1.add_transceiver_with_str_and_init(
+        "audio",
+        tr_init.direction(RtcRtpTransceiverDirection::Sendonly),
+    );
+    assert_eq!(tr1.direction(), RtcRtpTransceiverDirection::Sendonly);
+    assert_eq!(tr1.current_direction(), None);
+
+    let pc2: RtcPeerConnection = RtcPeerConnection::new().unwrap();
+
+    exchange_sdps(pc1, pc2).and_then(move |(_, p2)| {
+        assert_eq!(tr1.direction(), RtcRtpTransceiverDirection::Sendonly);
+        assert_eq!(
+            tr1.current_direction(),
+            Some(RtcRtpTransceiverDirection::Sendonly)
+        );
+
+        let tr2: RtcRtpTransceiver = js_sys::try_iter(&p2.get_transceivers())
+            .unwrap()
+            .unwrap()
+            .next()
+            .unwrap()
+            .unwrap()
+            .unchecked_into();
+
+        assert_eq!(tr2.direction(), RtcRtpTransceiverDirection::Recvonly);
+        assert_eq!(
+            tr2.current_direction(),
+            Some(RtcRtpTransceiverDirection::Recvonly)
+        );
+
+        Ok(())
+    })
+}
+
+fn exchange_sdps(
+    p1: RtcPeerConnection,
+    p2: RtcPeerConnection,
+) -> impl Future<Item = (RtcPeerConnection, RtcPeerConnection), Error = JsValue> {
+    JsFuture::from(p1.create_offer())
+        .and_then(move |offer| {
+            let offer = offer.unchecked_into::<RtcSessionDescriptionInit>();
+            JsFuture::from(p1.set_local_description(&offer)).join4(
+                JsFuture::from(p2.set_remote_description(&offer)),
+                Ok(p1),
+                Ok(p2),
+            )
+        })
+        .and_then(|(_, _, p1, p2)| JsFuture::from(p2.create_answer()).join3(Ok(p1), Ok(p2)))
+        .and_then(|(answer, p1, p2)| {
+            let answer = answer.unchecked_into::<RtcSessionDescriptionInit>();
+            JsFuture::from(p2.set_local_description(&answer)).join4(
+                JsFuture::from(p1.set_remote_description(&answer)),
+                Ok(p1),
+                Ok(p2),
+            )
+        })
+        .and_then(|(_, _, p1, p2)| Ok((p1, p2)))
+}
diff --git a/crates/web-sys/webidls/unavailable_option_primitive/RTCRtpTransceiver.webidl b/crates/web-sys/webidls/enabled/RTCRtpTransceiver.webidl
similarity index 100%
rename from crates/web-sys/webidls/unavailable_option_primitive/RTCRtpTransceiver.webidl
rename to crates/web-sys/webidls/enabled/RTCRtpTransceiver.webidl