WIP

src/cmd.js

@@ -201,10 +201,18 @@ const external_imports_loaded = (
     toplevel = false
   }
 
-  return modules_evaluated(state, result, node, toplevel)
+  if(result.then != null) {
+    return {...state, 
+      eval_modules_state: {
+        promise: result, node, toplevel,
+      }
+    }
+  } else {
+    return eval_modules_finished(state, result, node, toplevel)
+  }
 }
 
-const modules_evaluated = (state, result, node, toplevel) => {
+const eval_modules_finished = (state, result, node, toplevel) => {
   const next = apply_eval_result(state, result)
 
   let active_calltree_node
@@ -837,6 +845,7 @@ export const COMMANDS = {
   move_cursor,
   eval_selection,
   external_imports_loaded,
+  eval_modules_finished,
   on_deferred_call,
   calltree: calltree_commands,
 }

src/effects.js

@@ -176,6 +176,13 @@ export const render_common_side_effects = async (prev, next, command, ui) => {
     load_external_imports(next)
   }
 
+  if(prev.eval_modules_state != next.eval_modules_state) {
+    const s = next.eval_modules_state
+    s.promise.then(result => {
+      exec('eval_modules_finished', result, s.node, s.toplevel)
+    })
+  }
+
   if(prev.parse_result != next.parse_result) {
     render_parse_result(ui, next)
   }

test/test.js

@@ -2589,7 +2589,7 @@ const y = x()`
     assert_equal(get_deferred_calls(result), null)
   }),
 
-  test_only('async/await', () => {
+  test('async/await', () => {
     const code = `
       const x = async () => 123
       const y = async () => await x()