Ideally we would not show an error up front or the whole time they are typing, just when they submit something unacceptable.
Dave Rupert has a good solution that uses an input's Better, eh?
Unfortunately the browser doesn't give you any control over styling the default error message display, and they are (of course) different on every browser. Basically, you just hook the same events as the other examples, and insert a div wherever you like with the error.
This example is the same as above, but it will show the error message next to the label instead of as a tooltip thing under the input.const validation Error Class = 'validation-error' const parent Error Class = 'has-validation-error' const inputs = document.query Selector All('input, select, textarea') Each(function (input) ) I created a small Java Script library that rolls up all three techniques from this post so you dont have to: valid-form. The HTML5 form validation techniques in this post only work on the front end.
At the end, there's a little exercise to keep you busy too!
Form validation is the process of checking that a form has been filled in correctly before it is processed.
For example, if your form has a box for the user to type their email address, you might want your form handler to check that they've filled in their address before you deal with the rest of the form.
For example, you submit your data, it reloads the page, deletes half the things you entered, and tells you "Please enter a password with 2 lower case letters, 4 uppercase letters, a number, and an even number of %^ characters".
🤦 Lol & thanks, every travel or banking website I have ever used. An example: Many websites still roll their own form validation system, and making a something good from scratch is not a simple affair.