What input attribute do I use to make sure the user does not select everything in a list of html checkboxes? For example, I have created five checkboxes, but I want users to only select a maximum of three. I don't want to use radio buttons in this case. Please keep solutions to only HTML, not javascript.

Thanks. First newbie question here.

CodePudding user response：

HTML does not have any validation feature that makes that kind of check possible.

You need to use JavaScript to achieve this client-side.

You can use the setCustomValidity method with your custom rules to generate an error message that uses the same style as the native HTML validation messages.