hi all I've some problems in binding html elements. This is the thread I open in forum, attached you can found the my source project. https://forum.lazarus.freepascal.org/index.php/topic,59432.0.html The strange is: inside doRun I call BindElements and seems it works. Inside the OnClick event of a button, the bind is not valid anymore and I need to bind again before using components. 1. procedure?TMyApplication.doLoginClick(aEvent:?TJSEvent); 2. begin 3. ??Writeln('doLoginClick'); 4. ??// BindElements; ? // <- uncomment and all works! 5. ??writeln('edtEmail.Value = ',?edtEmail.value);?? ?// <- this give the error 6. ? DoServerLogin(edtEmail.Value,edtPassword.Value); 7. end; So, why the bind is not persistent and I need to bind again before use a component in OnClick event? Any idea?

So, why the bind is not persistent and I need to bind again before use a component in OnClick event? Normally the bind should be persistent. I use the described technique since several years meanwhile. Please check if your program code contains an Application.Free after the Application.Run. If it does, remove it. Earlier versions of Lazarus generated this statement erroneously when using the 'new web application' wizard.