diff --git a/src/ffi/js/mod.rs b/src/ffi/js/mod.rs
index e1b6ddf..ad8b242 100644
--- a/src/ffi/js/mod.rs
+++ b/src/ffi/js/mod.rs
@@ -2,7 +2,6 @@ pub mod client;
 pub mod workspace;
 pub mod cursor;
 pub mod buffer;
-pub mod op_cache;
 pub mod ext;
 
 
diff --git a/src/ffi/js/op_cache.rs b/src/ffi/js/op_cache.rs
deleted file mode 100644
index 67ca47c..0000000
--- a/src/ffi/js/op_cache.rs
+++ /dev/null
@@ -1,104 +0,0 @@
-use std::collections::HashMap;
-use napi_derive::napi;
-
-pub type OpTuple = (String, u32, String, u32); // buf_path, start, text, end
-
-#[napi]
-pub struct OpCache {
-	store: HashMap<OpTuple, i32>
-}
-
-#[napi]
-impl OpCache {
-	#[napi(constructor)]
-	pub fn new() -> Self {
-		OpCache {
-			store: HashMap::new()
-		}
-	}
-
-	#[napi]
-	pub fn to_string(&self) -> String {
-		self.store.iter()
-			.map(|(k, v)| format!("{}x Op(@{} {}:{} '{}')", k.0, v, k.1, k.3, k.2))
-			.collect::<Vec<String>>()
-			.join(", ")
-	}
-
-	#[napi]
-	pub fn put(&mut self, buf: String, start: u32, text: String, end: u32) -> i32 {
-		let op = (buf, start, text, end);
-		match self.store.get_mut(&op) {
-			Some(val) => {
-				if *val < 0 { *val = 0 }
-				*val += 1;
-				*val
-			},
-			None => {
-				self.store.insert(op, 1);
-				return 1;
-			}
-		}
-	}
-
-	#[napi]
-	pub fn get(&mut self, buf: String, start: u32, text: String, end: u32) -> bool {
-		let op = (buf, start, text, end);
-		match self.store.get_mut(&op) {
-			Some(val) => {
-				*val -= 1;
-				*val >= 0
-			}
-			None => {
-				tracing::warn!("never seen this op: {:?}", op);
-				self.store.insert(op, -1);
-				false
-			},
-		}
-	}
-}
-//a
-//consume a
-//a 
-
-
-
-
-#[cfg(test)]
-mod test {
-	#[test]
-	fn opcache_put_increments_internal_counter() {
-		let mut op = super::OpCache::new();
-		assert_eq!(op.put("default".into(), 0, "hello world".into(), 0), 1); // 1: did not already contain it
-		assert_eq!(op.put("default".into(), 0, "hello world".into(), 0), 2); // 2: already contained it
-	}
-	#[test]
-	fn op_cache_get_checks_count() {
-		let mut op = super::OpCache::new();
-		assert_eq!(op.get("default".into(), 0, "hello world".into(), 0), false);
-		assert_eq!(op.put("default".into(), 0, "hello world".into(), 0), 1);
-		assert_eq!(op.get("default".into(), 0, "hello world".into(), 0), true);
-		assert_eq!(op.get("default".into(), 0, "hello world".into(), 0), false);
-	}
-	#[test]
-	fn op_cache_get_works_for_multiple_puts() {
-		let mut op = super::OpCache::new();
-		assert_eq!(op.get("default".into(), 0, "hello world".into(), 0), false);
-		assert_eq!(op.put("default".into(), 0, "hello world".into(), 0), 1);
-		assert_eq!(op.put("default".into(), 0, "hello world".into(), 0), 2);
-		assert_eq!(op.get("default".into(), 0, "hello world".into(), 0), true);
-		assert_eq!(op.get("default".into(), 0, "hello world".into(), 0), true);
-		assert_eq!(op.get("default".into(), 0, "hello world".into(), 0), false);
-	}
-
-	#[test]
-	fn op_cache_different_keys(){
-		let mut op = super::OpCache::new();
-		assert_eq!(op.get("default".into(), 0, "hello world".into(), 0), false);
-		assert_eq!(op.put("default".into(), 0, "hello world".into(), 0), 1);
-		assert_eq!(op.get("workspace".into(), 0, "hi".into(), 0), false);
-		assert_eq!(op.put("workspace".into(), 0, "hi".into(), 0), 1);
-		assert_eq!(op.get("workspace".into(), 0, "hi".into(), 0), true);
-		assert_eq!(op.get("default".into(), 0, "hello world".into(), 0), true);
-	}
-}
\ No newline at end of file
diff --git a/src/ffi/js/workspace.rs b/src/ffi/js/workspace.rs
index 8437a82..6021c12 100644
--- a/src/ffi/js/workspace.rs
+++ b/src/ffi/js/workspace.rs
@@ -3,6 +3,21 @@ use crate::Workspace;
 use crate::buffer::controller::BufferController;
 use crate::cursor::controller::CursorController;
 
+#[napi(object, js_name = "Event")]
+pub struct JsEvent {
+	pub r#type: String,
+	pub value: String,
+}
+
+impl From<crate::api::Event> for JsEvent {
+	fn from(value: crate::api::Event) -> Self {
+		match value {
+			crate::api::Event::FileTreeUpdated(value) => Self { r#type: "filetree".into(), value },
+			crate::api::Event::UserJoin(value) => Self { r#type: "join".into(), value },
+			crate::api::Event::UserLeave(value) => Self { r#type: "leave".into(), value },
+		}
+	}
+}
 
 #[napi]
 impl Workspace {
@@ -46,4 +61,8 @@ impl Workspace {
 		Ok(self.delete(&path).await?)
 	}
 
+	#[napi(js_name = "event")]
+	pub async fn js_event(&self) -> napi::Result<JsEvent> {
+		Ok(JsEvent::from(self.event().await?))
+	}
 }