diff --git a/packages/pastojs/src/fppas2js.pp b/packages/pastojs/src/fppas2js.pp
index 4263ee4ef1..a6bb5a757f 100644
--- a/packages/pastojs/src/fppas2js.pp
+++ b/packages/pastojs/src/fppas2js.pp
@@ -354,7 +354,6 @@ Works:
 - typecast byte(longword) -> value & $ff
 - typecast TJSFunction(func)
 - modeswitch OmitRTTI
-- debugger;
 
 ToDos:
 - do not rename property Date
@@ -1263,11 +1262,8 @@ type
     procedure ComputeBinaryExprRes(Bin: TBinaryExpr; out
       ResolvedEl: TPasResolverResult; Flags: TPasResolverComputeFlags;
       var LeftResolved, RightResolved: TPasResolverResult); override;
-    // built-in functions
     procedure BI_TypeInfo_OnGetCallResult(Proc: TResElDataBuiltInProc;
       Params: TParamsExpr; out ResolvedEl: TPasResolverResult); override;
-    function BI_Debugger_OnGetCallCompatibility(Proc: TResElDataBuiltInProc;
-      Expr: TPasExpr; RaiseOnError: boolean): integer; virtual;
   public
     constructor Create; reintroduce;
     destructor Destroy; override;
@@ -1752,7 +1748,6 @@ type
     Function ConvertBuiltIn_New(El: TParamsExpr; AContext: TConvertContext): TJSElement; virtual;
     Function ConvertBuiltIn_Dispose(El: TParamsExpr; AContext: TConvertContext): TJSElement; virtual;
     Function ConvertBuiltIn_Default(El: TParamsExpr; AContext: TConvertContext): TJSElement; virtual;
-    Function ConvertBuiltIn_Debugger(El: TPasExpr; AContext: TConvertContext): TJSElement; virtual;
     Function ConvertRecordValues(El: TRecordValues; AContext: TConvertContext): TJSElement; virtual;
     Function ConvertSelfExpression(El: TSelfExpr; AContext: TConvertContext): TJSElement; virtual;
     Function ConvertBinaryExpression(El: TBinaryExpr; AContext: TConvertContext): TJSElement; virtual;
@@ -4236,16 +4231,6 @@ begin
   if Proc=nil then ;
 end;
 
-function TPas2JSResolver.BI_Debugger_OnGetCallCompatibility(
-  Proc: TResElDataBuiltInProc; Expr: TPasExpr; RaiseOnError: boolean): integer;
-// debugger;
-begin
-  if Expr is TParamsExpr then
-    Result:=CheckBuiltInMaxParamCount(Proc,TParamsExpr(Expr),0,RaiseOnError)
-  else
-    Result:=cExact;
-end;
-
 constructor TPas2JSResolver.Create;
 var
   bt: TPas2jsBaseType;
@@ -4336,9 +4321,6 @@ begin
     AddBaseType(Pas2JSBuiltInNames[pbitnUIntDouble],btUIntDouble);
   if btIntDouble in TheBaseTypes then
     AddBaseType(Pas2JSBuiltInNames[pbitnIntDouble],btIntDouble);
-  AddBuiltInProc('Debugger','procedure Debugger',
-      @BI_Debugger_OnGetCallCompatibility,nil,
-      nil,nil,bfCustom,[bipfCanBeStatement]);
 end;
 
 function TPas2JSResolver.CheckTypeCastRes(const FromResolved,
@@ -7302,12 +7284,6 @@ begin
       bfBreak: Result:=ConvertBuiltInBreak(El,AContext);
       bfContinue: Result:=ConvertBuiltInContinue(El,AContext);
       bfExit: Result:=ConvertBuiltIn_Exit(El,AContext);
-      bfCustom:
-        case BuiltInProc.Element.Name of
-        'Debugger': Result:=ConvertBuiltIn_Debugger(El,AContext);
-        else
-          RaiseNotSupported(El,AContext,20181126102554,'built in custom proc '+BuiltInProc.Element.Name);
-        end
     else
       RaiseNotSupported(El,AContext,20161130164955,'built in proc '+ResolverBuiltInProcNames[BuiltInProc.BuiltIn]);
     end;
@@ -8407,12 +8383,6 @@ begin
             if Result=nil then exit;
             end;
           bfDefault: Result:=ConvertBuiltIn_Default(El,AContext);
-          bfCustom:
-            case BuiltInProc.Element.Name of
-            'Debugger': Result:=ConvertBuiltIn_Debugger(El,AContext);
-            else
-              RaiseNotSupported(El,AContext,20181126101801,'built in custom proc '+BuiltInProc.Element.Name);
-            end;
         else
           RaiseNotSupported(El,AContext,20161130164955,'built in proc '+ResolverBuiltInProcNames[BuiltInProc.BuiltIn]);
         end;
@@ -11003,13 +10973,6 @@ begin
     AContext.Resolver.GetResolverResultDescription(ResolvedEl)],Param);
 end;
 
-function TPasToJSConverter.ConvertBuiltIn_Debugger(El: TPasExpr;
-  AContext: TConvertContext): TJSElement;
-begin
-  Result:=CreateLiteralCustomValue(El,'debugger');
-  if AContext=nil then ;
-end;
-
 function TPasToJSConverter.ConvertRecordValues(El: TRecordValues;
   AContext: TConvertContext): TJSElement;
 var