我想在两个字段中输入两个不同的消息,例如,用户名和密码字段包含“用户名不能为空”和“密码不能为空”等消息。我只是设法改变了消息,但两个字段都是一样的。这是here
$(document).ready(function() {
var elements = document.getElementsByTagName("INPUT");
for (var i = 0; i < elements.length; i++) {
elements[i].oninvalid = function(e) {
e.target.setCustomValidity("");
if (!e.target.validity.valid) {
e.target.setCustomValidity("Username cannot be blank");
}
};
elements[i].oninput = function(e) {
e.target.setCustomValidity("");
};
} })
答案 0 :(得分:14)
$(document).ready(function() {
var msg="";
var elements = document.getElementsByTagName("INPUT");
for (var i = 0; i < elements.length; i++) {
elements[i].oninvalid =function(e) {
if (!e.target.validity.valid) {
switch(e.target.id){
case 'password' :
e.target.setCustomValidity("Bad password");break;
case 'username' :
e.target.setCustomValidity("Username cannot be blank");break;
default : e.target.setCustomValidity("");break;
}
}
};
elements[i].oninput = function(e) {
e.target.setCustomValidity(msg);
};
}
})
答案 1 :(得分:4)
您可以使用此代码。
<input type="text" required="" name="username" placeholder="Username" oninvalid="this.setCustomValidity('Username cannot be blank')"> <input type="password" required="" name="password" placeholder="Password" oninvalid="this.setCustomValidity('Password cannot be blank')">
答案 2 :(得分:3)
您可以为用户名和密码id
元素添加input
属性:
<input placeholder="Username" required id="username" />
<input type="password" placeholder="Password" required id="password" />
然后您可以使用switch
语句根据事件的目标添加自定义验证消息:
$(document).ready(function () {
var elements = document.getElementsByTagName("INPUT");
for (var i = 0; i < elements.length; i++) {
elements[i].oninvalid = function (e) {
e.target.setCustomValidity("");
if (!e.target.validity.valid) {
switch (e.srcElement.id) {
case "username":
e.target.setCustomValidity("Username cannot be blank");
break;
case "password":
e.target.setCustomValidity("Password cannot be blank");
break;
}
}
};
elements[i].oninput = function (e) {
e.target.setCustomValidity("");
};
}
})
Here是一个演示。
答案 3 :(得分:0)
你在所有输入元素上循环,这就是你在每个元素中获得相同结果的原因。为您的输入提供一个id,例如用户名和密码,然后尝试:
$(document).ready(function() {
var msg="";
var elements = document.getElementsByTagName("INPUT");
for (var i = 0; i < elements.length; i++) {
elements[i].oninvalid = function(e) {
e.target.setCustomValidity("");
switch(e.target.id){
case "password" :
msg="Bad password";
case "username" :
msg="Username cannot be blank";
}
if (!e.target.validity.valid) {
e.target.setCustomValidity(msg);
}
};
elements[i].oninput = function(e) {
e.target.setCustomValidity("");
};
} })