如何删除所需的档案

Question

我是编码新手，我想知道如何删除此代码中所需的字段。非常感谢。例如，当字段为空时，我可以提交而不会显示任何错误。

>      function valid_inf() {   var errorUsername = document.getElementById('first_name-error');   var usernameInput =
> document.getElementById('first_name');   var errphone =
> document.getElementById('phone-error');   var phoneInput =
> document.getElementById('phone');   var erroremail =
> document.getElementById('email-error');   var emailInput =
> document.getElementById('email');   var firstname =
> $('#first_name').val();   var phone = $('#phone').val();   var email =
> $('#email').val();   if (firstname == "") {
>     errorUsername.style.display = 'block';
>     usernameInput.className = 'form__input form__input--red rounded-4';
> 
>   }else{
>     $("#first_name").on('keyup', function(){
>      errorUsername.style.display = 'none';
>      usernameInput.className = 'form__input rounded-4';    });
> 
>   }   if (phone == "") {
>     errphone.style.display = 'block';
>     phoneInput.className = 'form__input form__input--red rounded-4';
> 
>   }else{
>     $("#phone").on('keyup', function(){
>      errphone.style.display = 'none';
>      phoneInput.className = 'form__input rounded-4';    });
> 
>   }   if (email == "") {
>     erroremail.style.display = 'block';
>     emailInput.className = 'form__input form__input--red rounded-4';
>     return false;   }else{
>     $("#email").on('keyup', function(){
>      erroremail.style.display = 'none';
>      emailInput.className = 'form__input rounded-4';    });

Answer 1

如果要删除验证，只需删除特定字段名的if-else条件

例如，如果您想删除first_name验证，则需要像以下一样更改代码

function valid_inf() {
var errorUsername = document.getElementById('first_name-error');
var usernameInput =
document.getElementById('first_name');
var errphone =
document.getElementById('phone-error');
var phoneInput =
document.getElementById('phone');
var erroremail =
document.getElementById('email-error');
var emailInput =
document.getElementById('email');
var firstname =
$('#first_name').val();
var phone = $('#phone').val();
var email =
$('#email').val();
// if (firstname == "") {
//     errorUsername.style.display = 'block';
//     usernameInput.className = 'form__input form__input--red rounded-4';
// } else {
//     $("#first_name").on('keyup', function () {
//         errorUsername.style.display = 'none';
//         usernameInput.className = 'form__input rounded-4';
//     });
// }
if (phone == "") {
errphone.style.display = 'block';
phoneInput.className = 'form__input form__input--red rounded-4';
} else {
$("#phone").on('keyup', function () {
errphone.style.display = 'none';
phoneInput.className = 'form__input rounded-4';
});
}
if (email == "") {
erroremail.style.display = 'block';
emailInput.className = 'form__input form__input--red rounded-4';
return false;
} else {
$("#email").on('keyup', function () {
erroremail.style.display = 'none';
emailInput.className = 'form__input rounded-4';
});