diff --git a/JSWC/Init.aplf b/JSWC/Init.aplf
index 7a51bfc..dea40f7 100644
--- a/JSWC/Init.aplf
+++ b/JSWC/Init.aplf
@@ -6,7 +6,7 @@
  :Case 1 ⋄ mode←⊃args ⋄ CODELOCATION←⊃⎕RSI
  :Case 2 ⋄ (mode CODELOCATION)←args
  :Else
-     'Right agument: mode [codelocation]'⎕SIGNAL 5
+     'Right argument: mode [codelocation]'⎕SIGNAL 5
  :EndSelect
 
  :If 0=⎕NC'prefix'
@@ -49,7 +49,9 @@
      MAXLOG←2000
  :EndIf
  :If 0=⎕NC'LOGMODES'
-     LOGMODES←⎕A ⍝ Log everything (see Log)
+     :If 0=≢LOGMODES←1⊃160⌶'EWC_LOGMODES'   ⍝ do we have a default in the environment?
+         LOGMODES←⎕A ⍝ Log everything (see Log)
+     :EndIf
  :EndIf
  :If 0=⎕NC'RESOURCES'
      RESOURCES←1 2⍴⊂''
@@ -79,7 +81,7 @@
      make_JSWC CODELOCATION ⍝ So create the timer here
  :EndIf
 
- :If 9=⎕NC 'WSS'
+ :If 9=⎕NC'WSS'
      ⎕←'Closing existing Web Socket Server...'
      WSS.Stop
      ⎕DL 5
@@ -121,7 +123,7 @@
      (⍕z)⎕SIGNAL 11
  :EndIf
 
- :If 4≥⍴devCaps←'.' ⎕WG 'DevCaps'
+ :If 4≥⍴devCaps←'.'⎕WG'DevCaps'
      DPR←100÷⍨4⊃devCaps
  :Else
      DPR←1
diff --git a/JSWC/Log.aplf b/JSWC/Log.aplf
index e37c548..fde8272 100644
--- a/JSWC/Log.aplf
+++ b/JSWC/Log.aplf
@@ -1,4 +1,4 @@
-mode Log msg
+ mode Log msg;json
 ⍝ Log modes: Controlled by JSWC.LOGMODES
 ⍝ D: Debug
 ⍝ E: Error
@@ -8,6 +8,18 @@ mode Log msg
 ⍝ R: Receive on WebSocket
 ⍝ C: Connect or Disconnect
 ⍝ U: Unsupported feature
+⍝ w: log eW* object/property access (for testing)
 
-→(mode∊LOGMODES)↓0
-⎕←((,'ZI2,<:>,ZI2,<.>,ZI3' ⎕FMT 1 3⍴¯3↑⎕TS),' ',mode,':') msg
+ →(mode∊LOGMODES)↓0
+ ⎕←((,'ZI2,<:>,ZI2,<.>,ZI3'⎕FMT 1 3⍴¯3↑⎕TS),' ',mode,':')msg
+ :If mode≡'w'
+    ⍝ primitive: we collect json objects in that file - it's not "json" though...(needs to be enclosed in [])
+    ⍝ also we do not care about max file size, we just keep appending
+    ⍝ do it's the responsibility of the user to clean up the file.
+    ⍝ That's why mode='w' is useful - it's not part of the default (⎕A)
+    ⍝ and needs to be set explicitely!
+    ⍝ (see eWC Tests for example usage that deletes the file before running tests
+    ⍝  and also adds the "[]" )
+     msg←('(:.*,)(.*)$'⎕R('\1 TS: [',(∊(⍕¨¯4↑⎕TS),¨','),'],\2')⍠'Greedy' 0)msg
+     (⊂msg)⎕NPUT(JSWCFolder,'objectlog.json5')2
+ :EndIf
diff --git a/JSWC/dWC.aplf b/JSWC/dWC.aplf
index 67d4580..164ea72 100644
--- a/JSWC/dWC.aplf
+++ b/JSWC/dWC.aplf
@@ -117,6 +117,7 @@
  :EndIf
 
  'D' Log '*** CREATE ',WC.WC.Properties.Type,' ',WC.WC.ID,' at ',⍕3↑showCallStack
+ 'w' Log '{Caller: "',(2⊃⎕si),'", Action:"WC", ID:"',WC.WC.ID,'", Type:"',WC.WC.Properties.Type,'", Properties:[',(¯1↓∊{'"',⍵,'",'}¨propnames),']},'
  fixSendEvents WC.WC.(ID Properties)
  sendObject WC WC.WC.ID
 
diff --git a/JSWC/dWG.aplf b/JSWC/dWG.aplf
index 753ab2f..7a007d1 100644
--- a/JSWC/dWG.aplf
+++ b/JSWC/dWG.aplf
@@ -92,3 +92,5 @@
  :If 1=≡Props
      R←⊃R
  :EndIf
+
+ 'w' Log '{Caller: "',(2⊃⎕si),'", Action:"WG", ID:"', Name,'",Properties:[',(¯1↓∊{'"',⍵,'",'}¨p),']},'
diff --git a/JSWC/dWS.aplf b/JSWC/dWS.aplf
index b62b9bd..c63aa52 100644
--- a/JSWC/dWS.aplf
+++ b/JSWC/dWS.aplf
@@ -89,3 +89,5 @@
  :If ~0=⍴WS.WS.Properties.⎕NL-2
      sendObject WS WS.WS.ID
  :EndIf
+
+ 'w' Log '{Caller: "',(2⊃⎕si),'", Action:"WS", ID:"',WS.WS.ID,'", Properties:[',(¯1↓∊{'"',⍵,'",'}¨names),']},'
diff --git a/Tests/eWC_createBrowser.aplf b/Tests/eWC_createBrowser.aplf
index 14e52da..1c1f2e5 100644
--- a/Tests/eWC_createBrowser.aplf
+++ b/Tests/eWC_createBrowser.aplf
@@ -1,6 +1,6 @@
  {larg}eWC_createBrowser rarg;cmd
 ⍝ ⍵ corresponds to Run's ⍵
 
- cmd←'LOAD=',EWC_HOME,' LX="demo.Run ',(⍕rarg),'" EWC_PORT=22344'
+ cmd←'LOAD=',EWC_HOME,' LX="demo.Run ',(⍕rarg),'" EWC_PORT=22344 EWC_LOGMODES=w',(1=0 _Env'TRACE_DEMOS')/' EWC_TRACEDEMOS=1'
  p←⎕NEW #.APLProcess(''cmd 0 '' ''EWC_HOME)     ⍝ do not localise this!
  #.S.InitBrowser larg
diff --git a/Tests/eWC_defaults.json5 b/Tests/eWC_defaults.json5
index 60c1168..ea257b5 100644
--- a/Tests/eWC_defaults.json5
+++ b/Tests/eWC_defaults.json5
@@ -2,4 +2,6 @@
     SCREENSHOT: 2,        // 0: never, 1: on error, 2: always
     RANDOMORDER: 1,       // execute tests in random order?
     PROGRESSINDICATOR: 1, // no info, 1: show name of next test, 2: and wait for keypress
+    TRACE_DEMOS: 0,      // trace into the demos?
+    TRACE_TESTS: 1,      // trace into the tests?
 }
\ No newline at end of file
diff --git a/demo/Run.aplf b/demo/Run.aplf
index 901fefc..533158e 100644
--- a/demo/Run.aplf
+++ b/demo/Run.aplf
@@ -22,6 +22,10 @@
  :EndTrap
 
  JSWC.NOIDQ←0 ⍝ Allow interactive DQ
+ ⍝ trace into demo functions?
+ :If 1≡⊃2⊃⎕VFI 2 ⎕NQ'.' 'GetEnvironment' 'EWC_TRACEDEMOS'
+     #.demo.({'Demo'≡4↑⍵:1 ⎕STOP ⍵}¨(⎕NL-3)~'DemoMenu' 'DemoDefault')
+ :EndIf
 
  :Select JSWC.MODE
  :Case 0 ⍝ Desktop