2 files changed, 34 insertions, 20 deletions
diff --git a/cli/ops/errors.rs b/cli/ops/errors.rs
index ea6a5ae5a..14d21ee84 100644
--- a/cli/ops/errors.rs
+++ b/cli/ops/errors.rs
@@ -11,6 +11,7 @@ use deno_core::serde_json::json;
 use deno_core::serde_json::Value;
 use deno_core::OpState;
 use serde::Deserialize;
+use serde::Serialize;
 use std::collections::HashMap;
 
 pub fn init(rt: &mut deno_core::JsRuntime) {
@@ -27,13 +28,19 @@ struct ApplySourceMap {
   column_number: i32,
 }
 
+#[derive(Serialize)]
+#[serde(rename_all = "camelCase")]
+struct AppliedSourceMap {
+  file_name: String,
+  line_number: u32,
+  column_number: u32,
+}
+
 fn op_apply_source_map(
   state: &mut OpState,
-  args: Value,
+  args: ApplySourceMap,
   _: (),
-) -> Result<Value, AnyError> {
-  let args: ApplySourceMap = serde_json::from_value(args)?;
-
+) -> Result<AppliedSourceMap, AnyError> {
   let mut mappings_map: CachedMaps = HashMap::new();
   let ps = state.borrow::<ProcState>().clone();
 
@@ -46,11 +53,11 @@ fn op_apply_source_map(
       ps,
     );
 
-  Ok(json!({
-    "fileName": orig_file_name,
-    "lineNumber": orig_line_number as u32,
-    "columnNumber": orig_column_number as u32,
-  }))
+  Ok(AppliedSourceMap {
+    file_name: orig_file_name,
+    line_number: orig_line_number as u32,
+    column_number: orig_column_number as u32,
+  })
 }
 
 fn op_format_diagnostic(
diff --git a/cli/ops/runtime_compiler.rs b/cli/ops/runtime_compiler.rs
index e77f4d1e7..d63d97f58 100644
--- a/cli/ops/runtime_compiler.rs
+++ b/cli/ops/runtime_compiler.rs
@@ -14,13 +14,12 @@ use deno_core::error::AnyError;
 use deno_core::error::Context;
 use deno_core::parking_lot::Mutex;
 use deno_core::resolve_url_or_path;
-use deno_core::serde_json;
-use deno_core::serde_json::json;
 use deno_core::serde_json::Value;
 use deno_core::OpState;
 use deno_runtime::permissions::Permissions;
 use import_map::ImportMap;
 use serde::Deserialize;
+use serde::Serialize;
 use std::cell::RefCell;
 use std::collections::HashMap;
 use std::rc::Rc;
@@ -50,13 +49,21 @@ struct EmitArgs {
   sources: Option<HashMap<String, Arc<String>>>,
 }
 
+#[derive(Serialize)]
+#[serde(rename_all = "camelCase")]
+struct EmitResult {
+  diagnostics: crate::diagnostics::Diagnostics,
+  files: HashMap<String, String>,
+  ignored_options: Option<crate::config_file::IgnoredCompilerOptions>,
+  stats: crate::module_graph::Stats,
+}
+
 async fn op_emit(
   state: Rc<RefCell<OpState>>,
-  args: Value,
+  args: EmitArgs,
   _: (),
-) -> Result<Value, AnyError> {
+) -> Result<EmitResult, AnyError> {
   deno_runtime::ops::check_unstable2(&state, "Deno.emit");
-  let args: EmitArgs = serde_json::from_value(args)?;
   let root_specifier = args.root_specifier;
   let ps = state.borrow().borrow::<ProcState>().clone();
   let mut runtime_permissions = {
@@ -127,10 +134,10 @@ async fn op_emit(
   })?;
   result_info.diagnostics.extend_graph_errors(graph_errors);
 
-  Ok(json!({
-    "diagnostics": result_info.diagnostics,
-    "files": files,
-    "ignoredOptions": result_info.maybe_ignored_options,
-    "stats": result_info.stats,
-  }))
+  Ok(EmitResult {
+    diagnostics: result_info.diagnostics,
+    files,
+    ignored_options: result_info.maybe_ignored_options,
+    stats: result_info.stats,
+  })
 }