How to make the text field not null in a jsp page. I have googled it but could not find any relevant answer

Question

How to make the text field not null in a jsp page. I have googled it but could not find any relevant answer

Answer 1

using html 5 ,

<input type="text" id="textbox" required/>

is enough.

yours as ,

<p><label class="left-col">Username:</label><input type="text" name="username" required/>   </p>

NOTE: It works on the modern browser only . you can go for the javascript validation .If you want it to work for older versions