You can make the user experience pretty clean and clear with CSS selectors.But it does require some CSS trickery to get everything just right! Just that alone is a UX consideration all too many forms fail on.
I'd say if the form is short and an obvious pattern (like sign up or log in), you could use the placeholder visual pattern, but use real labels instead. You don't need to do any tricky cursor stuff, because it's all semantically wired up already. In order to do that, we'll need to know if the input is empty or not.Java Script provides a way to validate form's data on the client's computer before sending it to the web server. First let us see how to do a basic form validation.In the above form, we are calling validate() to validate data when onsubmit event is occurring.minimum password length or maximum characters in bio textarea) and even go full-on regex. Say you wanted password requirements like stuff here, which makes this not work great in Firefox and IE. Feel free to pick and choose stuff from here that works for you.Form validation normally used to occur at the server, after the client had entered all the necessary data and then pressed the Submit button.