fix

src/cmd.js

@@ -754,7 +754,7 @@ const on_async_call = (state, call) => {
   }
 }
 
-const load_dir = (state, dir) => {
+const do_load_dir = (state, dir) => {
   const collect_files = dir => dir.kind == 'file' 
     ? [dir]
     : dir.children.map(collect_files).flat()
@@ -763,13 +763,21 @@ const load_dir = (state, dir) => {
     collect_files(dir).map(f => [f.path, f.contents])
   )
 
-  // Clear parse cache and rerun code
-  return rerun_code({
+  return {
     ...state,
-    // remove cache
-    parse_result: null,
     project_dir: dir,
     files: {...files, ...state.files},
+  }
+}
+
+const load_dir = (state, dir) => {
+  // Clear parse cache and rerun code
+  return rerun_code({
+    ...do_load_dir(state, dir),
+    // remove cache. We have to clear cache because imports of modules that are
+    // not available because project_dir is not available have errors and the
+    // errors are cached
+    parse_result: null,
   })
 }
 
@@ -789,12 +797,13 @@ const open_run_window = state => {
 const get_initial_state = state => {
   const with_files = state.project_dir == null
     ? state
-    : load_dir(state, state.project_dir)
+    : do_load_dir(state, state.project_dir)
 
   const entrypoint = with_files.entrypoint
   const current_module = with_files.current_module
+  const html_file = with_files.html_file
 
-  const s = {
+  return {
     ...with_files,
     // If module for entrypoint or current_module does not exist, use *scratch*
     entrypoint: 
@@ -804,9 +813,10 @@ const get_initial_state = state => {
     current_module: with_files.files[current_module] == null 
       ? '' 
       : current_module,
+    html_file: with_files.files[html_file] == null 
+      ? '' 
+      : html_file,
   }
-
-  return run_code(s, 0)
 }
 
 export const COMMANDS = {

src/effects.js

@@ -122,12 +122,6 @@ const render_parse_result = (ui, state) => {
 export const render_initial_state = (ui, state) => {
   ensure_session(ui, state)
   ui.editor.switch_session(state.current_module)
-  render_parse_result(ui, state)
-  if(state.current_calltree_node != null) {
-    ui.render_debugger(state)
-    render_coloring(ui, state)
-  }
-  load_external_imports(state)
 }
 
 export const render_common_side_effects = (prev, next, command, ui) => {

src/eval.js

@@ -58,8 +58,8 @@ type Node = ToplevelCall | Call
 
 // TODO just export const Iframe_Function?
 const make_function = (...args) => {
-  if(globalThis.run_window == null) {
-    // Tests are run in Node.js or user have not opened run_window
+  if(globalThis.process != null) {
+    // Tests are run in Node.js
     return new Function(...args)
   } else {
     // Code run in browser and user opened run_window

src/index.js

@@ -141,18 +141,23 @@ export const init = (container, _COMMANDS) => {
 
   read_modules().then(initial_state => {
 
-    open_run_iframe(initial_state)
-
     state = COMMANDS.get_initial_state({
       ...initial_state, 
       on_async_call: (...args) => exec('on_async_call', ...args)
     })
+
     // Expose state for debugging
     globalThis.__state = state
     ui = new UI(container, state)
     // Expose for debugging
     globalThis.__ui = ui
+
     render_initial_state(ui, state)
+
+    open_run_iframe(state)
+    
+    // TODO exec on iframe load
+    exec('open_run_window')
   })
 }
 
@@ -186,7 +191,7 @@ export const exec = (cmd, ...args) => {
   }
 
   // Sanity check
-  if(state?.parse_result == null) {
+  if(state?.current_module == null) {
     console.error('command did not return state, returned', result)
     throw new Error('illegal state')
   }