JS general form submission 1-onsubmit

During form submission , If you directly click on the form submit Button will submit the form , But this method is not applicable when verification is needed .

Therefore, it usually happens in form In the statement of onsubmit Methods , Add fields to be verified in this method .

The method is as follows ：

1、form Forms

<form id='form1' action='' method='' omsubmit='return checkForm()'>

<input type='text' name='username' value=''/>

<input type='password' name='pwd' value =''/>

<input type='password' name='pwd2' value =''/>

<button type='submit'> Submit <button/>

<form/>

2、 Statement onsubmit Method

<script>

function checkForm(){

    var form = document.getElementById('form1');

    // It can be modified here input  

    // Go to the next step

    return true;

}

<script/>

3、 Submit Form

Triggered when the form is submitted checkForm, You can verify the password twice , You can also verify the validity of the user name , And if something goes wrong return fasle;, This will prevent the submission of the form .

It's just right onsubmit An attempt to , Then I will try to write general submit Method , And the use of ajax Method of submission , In this way, there is no way to refresh the submission form and ignore the form items to write the submission form .

above .

Refer to the connection ：

https://www.cnblogs.com/web-wjg/p/7894657.html