Disable button whenever a text field is empty dynamically

Question

Here\'s my code:

 0) document.getElementById(\'start_button\').disabled = false; else document.get         


        

Answer 1

Add a check when the button is clicked to see if there is any text. If there isn't, pop up an alert box (or some other form of feedback) to tell the user to enter data, and don't do the button functionality.

Example: