HTML5 + setCutomValidity () function verification form instance sharing _ javascript skills

This article will share with you the example of using the setCutomValidity () function in HTML5 to implement the verification form. it is very time-and practical. we recommend it to you. if you need it, you can refer to it. HTML5 form verification brings convenience to front-end personnel, but there are some defects in user experience. the default prompt is unfriendly to users and cannot accurately obtain desired information. Fortunately, when designing interfaces, we provided the setCustomValidilty method to customize the prompt information. This is good news, but there are also some drawbacks. it is necessary to let developers do some extra processing to achieve the purpose they really want.

Example 1:

 The Html5 page uses javascript to verify the form to determine the input