Hi , I have a requirement where I have to show warning on the screen when user is trying to input wrong details which is not present in the DB table . 
So to achieve this requirement i have written data transform which will get the valid data from the DB table using a data page and the i'm setting a flag to check whether  the input filled is correct , if correct setting the flag to false and if incorrect i'm setting the flag to true . 

Now i'm calling this data transform from the section where I have a text input field . So in that the event is change and action is refresh section and calling the data transform in that .

And to show the warning added one section inside that i have a warning label and a visibility condition like when flag is set to true show warning .

After adding this logic when i input wrong data in the text field it will show me the warning only when i click somewhere on the screen . But i want to show warning while inputting some wrong data . How can we achieve this?