Implicit submission of form when pressing enter key

As we know, if we want to submit data in the form, we just need to create a input or button element in the form and give them the submit value to the type attribute. Or using javascript to call form.submit().

But there is third way to submit form. That’s the implicit submission of form when pressing the enter key under some situations. The form implicit subbmission supported by all browsers, and html spec strongly recommand do this.