javascript 使用 jquery 验证表单输入字段
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时间：2020-10-29 09:13:03 来源:igfitidea点击:
Validate form input fields using jquery
提问by Mohammed Wahed Khan
I'm working on form validation. Everything is working fine what I actually want is I want to add some more input fields like checkbox, radio button, select and textarea, upload file and like so into the form I want them to be validated as well.
I got the email input error working but it is not working correctly as it should validate the email first and then it should remove the error message but it is removing the error message just after entering few characters.
I want the phone number to be validated. Like the user should enter 10 numeric digits that is in India if in another country that will differ I am a bit confused how to do it.
I want a success message to pop up when all the fields are correctly validated as they should. what I tried is this:
$('.success_msg').fadeIn().delay(3000).fadeOut(); $('input , textarea , select').val('').removeClass('valid'); event.preventDefault();I want all the fields to be cleared when all the validations are done and the success message is sent.
我正在研究表单验证。一切正常，我真正想要的是我想添加一些更多的输入字段，如复选框、单选按钮、选择和文本区域、上传文件等，我希望它们也得到验证。
我收到电子邮件输入错误，但它无法正常工作，因为它应该首先验证电子邮件，然后它应该删除错误消息，但它在输入几个字符后立即删除错误消息。
我想验证电话号码。就像用户应该输入印度的 10 个数字一样，如果在另一个不同的国家，我有点困惑如何去做。
当所有字段都正确验证时，我希望弹出一条成功消息。我试过的是这样的：
$('.success_msg').fadeIn().delay(3000).fadeOut(); $('input , textarea , select').val('').removeClass('valid'); event.preventDefault();我希望在完成所有验证并发送成功消息后清除所有字段。
Can anyone point me in the right direction?
任何人都可以指出我正确的方向吗？
var Validator = function(formObject) {
this.form = $(formObject);
var Elements = {
name: {
reg: /^[a-zA-Z]{2,20}$/,
error: "Not a valid name.",
},
email: {
reg: /^[a-z-0-9_+.-]+\@([a-z0-9-]+\.)+[a-z0-9]{2,7}$/i,
error: "Not a valid e-mail address.",
},
phone: {
reg: /^\(?([0-9]{3})\)?[-. ]?([0-9]{3})[-. ]?([0-9]{4})$/,
error: "Not a valid number.",
},
message: {
reg: /^(?!\s*$).+/,
error: "Message field cannot be empty.",
},
};
var handleError = function(element, message) {
element.addClass('input-error');
var $err_msg = element.parent('div');
$err_msg.find('.error').remove();
var error = $('<div class="error"></div>').text(message);
error.appendTo($err_msg);
element.keyup(function() {
$(error).fadeOut(1000, function() {
element.removeClass('input-error');
});
});
};
this.validate = function() {
var errorCount = 0;
this.form.find("input, textarea").each(function(index, field) {
var type = $(field).data("validation");
var validation = Elements[type];
if (validation) {
if (!validation.reg.test($(field).val())) {
errorCount++;
handleError($(field), validation.error);
}
}
})
return errorCount == 0;
};
};
$(function() {
$("form#test").on("submit", function(event) {
//event.preventDefault();
return new Validator(this).validate(); // "this" here refers to the form
})
})body {
background: #fff;
color: #333;
font: 76% Verdana, sans-serif;
}
form {
margin: 1em 0 0 2em;
width: 90%;
}
fieldset {
margin: 0;
border: 1px solid #ccc;
padding-bottom: 1em;
}
legend {
font-weight: bold;
text-transform: uppercase;
}
label {
float: left;
width: 5em;
padding-right: 2em;
font-weight: bold;
}
div {
margin-bottom: 30px;
}
input {
font: 1em Verdana, sans-serif;
}
fieldset ul li input {
float: left;
width: 120px;
border: 1px solid #ccc;
}
textarea {
width: 300px;
height: 200px;
border: 1px solid #ccc;
font: 1em Verdana, sans-serif;
}
form p {
margin: 0;
padding: 0.4em 0 0 7em;
}
form p input {
background: #666;
color: #fff;
font-weight: bold;
}
div.error {
clear: left;
margin-left: 5.3em;
color: red;
padding-right: 1.3em;
height: 100%;
padding-bottom: 0.3em;
line-height: 1.3;
}
.input-error {
background: #ff9;
border: 1px solid red;
}
.success_msg {
width: 350px;
line-height: 40px;
border: 1px solid green;
border-radius: 5px;
background-color: rgba(213, 255, 187, 0.7);
display: none;
position: absolute;
bottom: 5px;
left: 50%;
transform: translateX(-50%);
z-index: 999;
text-align: center;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form action="#" method="post" id="test">
<fieldset>
<legend>Contact information</legend>
<div>
<label for="firstname">Firstname:</label>
<input type="text" name="firstname" id="firstname" data-validation="name" />
</div>
<div>
<label for="lastname">Lastname:</label>
<input type="text" name="lastname" id="lastname" data-validation="name" />
</div>
<div>
<label for="email">Email:</label>
<input type="email" name="email" id="email" data-validation="email" />
</div>
<div>
<label for="phone">phone</label>
<input type="number" name="phone" id="phone" data-validation="phone" />
</div>
<div>
<label>Gender:</label>
<input type="radio" name="gender" value="male" data-validation="gender" />
<input type="radio" name="gender" value="female" data-validation="gender">
</div>
<div>
<label>select</label>
<input type="checkbox" name="checkbox" id="checkbox1" value="demo1" data-validation="checkbox" />
<input type="checkbox" name="checkbox" id="checkbox2" value="demo2" data-validation="checkbox" />
<input type="checkbox" name="checkbox" id="checkbox3" value="demo3" ata-validation="checkbox" />
</div>
<select data-validation="selectOption">
<option value="">Select any option</option>
<option value="red">Red</option>
<option value="blue">Blue</option>
<option value="green">Green</option>
</select>
<div>
<label>Upload:</label>
<input type="file" name="file" id="file" data-validation="file" />
</div>
<div>
<label for="message">Message:</label>
<textarea id="message" name="message" cols="30" rows="15" data-validation="message"></textarea>
</div>
<p><input type="submit" name="send" id="send" value="Send" /></p>
</fieldset>
<div class="success_msg">
<p>Form submitted Successfully</p>
</div>
</form>Please feel free to clear your doubts before you invest your time answering the question.
在您投入时间回答问题之前，请随时清除您的疑虑。
采纳答案by Mehraj Khan
I hope this is what you were trying to achieve. This took longer than expected but I tried to achieve it. This whole form is custom form. You could have used the existing plugins to achieve it. Any which ways it took much time to figure it out. Consider the question as most of things are working, ignore if something's not what you want.
我希望这就是你想要达到的目标。这花了比预期更长的时间，但我试图实现它。整个表单是自定义表单。您可以使用现有的插件来实现它。任何方式都需要很长时间才能弄清楚。考虑这个问题，因为大多数事情都在起作用，如果某些事情不是你想要的，请忽略。
$(document).ready(function() {
/* contact form validation */
var Validator = function(formObject) {
this.form = $(formObject);
var Elements = {
name: {
reg: /^[a-zA-Z ]{2,20}$/,
require: true,
error: "Not a valid name.",
},
email: {
reg: /^[a-z-0-9_+.-]+\@([a-z0-9-]+\.)+[a-z0-9]{2,7}$/i,
error: "Not a valid e-mail address.",
},
phone: {
reg: /^\(?([0-9]{3})\)?[-. ]?([0-9]{3})[-. ]?([0-9]{4})$/,
error: "Not a valid number.",
},
message: {
reg: /^(?!\s*$).+/,
error: "Message field cannot be empty.",
},
gender: {
error: "gender is required",
},
selectOption: {
error: "this field is required",
required: true
}
};
var handleError = function(element, message) {
element.addClass('input-error');
var $err_msg = element.parent('div');
$err_msg.find('.error').remove();
var error = $('<div class="error"></div>').text(message);
error.appendTo($err_msg);
console.log(element);
element.on('keypress change', function() {
$(error).fadeOut(1000, function() {
console.log(element);
element.removeClass('input-error');
});
});
};
/* Select Option */
this.validate = function() {
var errorCount = 0;
this.form.find("select").each(function(index, field) {
var type = $(field).data("validation");
var validation = Elements[type];
if ($(field).val() == "") {
errorCount++;
handleError($(field), validation.error);
}
});
this.form.find("input, textarea").each(function(index, field) {
var type = $(field).data("validation");
var validation = Elements[type];
if (validation !== undefined) {
var re = new RegExp(validation.reg);
if (validation) {
if (!re.test($(field).val())) {
errorCount++;
handleError($(field), validation.error);
}
}
}
})
/* Radio button */
var radioList = $('input:radio');
var radioNameList = new Array();
var radioUniqueNameList = new Array();
var notCompleted = 0;
for (var i = 0; i < radioList.length; i++) {
radioNameList.push(radioList[i].name);
}
radioUniqueNameList = jQuery.unique(radioNameList);
console.log(radioUniqueNameList);
for (var i = 0; i < radioUniqueNameList.length; i++) {
var field = $('#' + radioUniqueNameList[i]);
var type = field.data("validation");
var validation = Elements[type];
if ($('input[name=' + type + ']:checked', '#test').val() == undefined) {
errorCount++;
handleError($(field), validation.error);
}
}
return errorCount == 0;
};
};
/* Submit form*/
$(function() {
$("form#test").on('submit', function(e) {
var NoErrors = new Validator(this).validate();
if (NoErrors == true) {
$.ajax({
url: this.action,
type: this.method,
data: $(this).serialize(),
success: function() {
// AJAX request finished, handle the results and error msg
$('.success_msg').fadeIn().delay(3000).fadeOut();
$('input[type!="submit"], textarea').val('').removeClass('error');
}
});
}
return false;
})
})
});body {
background: #fff;
color: #333;
font: 76% Verdana, sans-serif;
}
form {
margin: 1em 0 0 2em;
width: 90%;
}
fieldset {
margin: 0;
border: 1px solid #ccc;
padding-bottom: 1em;
}
legend {
font-weight: bold;
text-transform: uppercase;
}
label {
float: left;
width: 5em;
padding-right: 2em;
font-weight: bold;
}
div {
margin-bottom: 30px;
}
input {
font: 1em Verdana, sans-serif;
}
fieldset ul li input {
float: left;
width: 120px;
border: 1px solid #ccc;
}
textarea {
width: 300px;
height: 200px;
border: 1px solid #ccc;
font: 1em Verdana, sans-serif;
}
form p {
margin: 0;
padding: 0.4em 0 0 7em;
}
form p input {
background: #666;
color: #fff;
font-weight: bold;
}
div.error {
clear: left;
margin-left: 5.3em;
color: red;
padding-right: 1.3em;
height: 100%;
padding-bottom: 0.3em;
line-height: 1.3;
}
.input-error {
background: #ff9;
border: 1px solid red;
}
.success_msg {
width: 350px;
line-height: 40px;
border: 1px solid green;
border-radius: 5px;
background-color: rgba(213, 255, 187, 0.7);
display: none;
position: absolute;
bottom: 5px;
left: 50%;
transform: translateX(-50%);
z-index: 999;
text-align: center;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
<form action="#" method="post" id="test">
<fieldset>
<legend>Contact information</legend>
<div>
<label for="firstname">Firstname:</label>
<input type="text" name="firstname" id="firstname" data-validation="name" />
</div>
<div>
<label for="lastname">Lastname:</label>
<input type="text" name="lastname" id="lastname" data-validation="name" />
</div>
<div>
<label for="email">Email:</label>
<input type="email" name="email" id="email" data-validation="email" />
</div>
<div>
<label for="phone">phone</label>
<input type="number" name="phone" id="phone" data-validation="phone" />
</div>
<div>
<label>Gender:</label>
<input type="radio" name="gender" value="male" data-validation="gender" />
<input type="radio" name="gender" value="female" data-validation="gender">
</div>
<select data-validation="selectOption">
<option value="">Select any option</option>
<option value="red">Red</option>
<option value="blue">Blue</option>
<option value="green">Green</option>
</select>
<div>
<label for="message">Message:</label>
<textarea id="message" name="message" cols="30" rows="15" data-validation="message"></textarea>
</div>
<p><input type="submit" name="send" id="send" value="Send" /></p>
</fieldset>
<div class="success_msg">
<p>Form submitted Successfully</p>
</div>
</form>回答by Bhumi Shah
Here is the working code:
这是工作代码：
https://jsfiddle.net/bhumi/o2gxgz9r/47570/
https://jsfiddle.net/bhumi/o2gxgz9r/47570/
I have changed selector to use id
我已将选择器更改为使用 id
You need to use loop in handle error:
您需要在处理错误中使用循环：
var Validator = function(form) {
this.form = $(form);
var Elements = {
name: {
selector: $('input[type=text]'),
reg: /^[a-zA-Z]{2,20}$/
},
email: {
selector: $('input[type=email]'),
reg: /^[a-z-0-9_+.-]+\@([a-z0-9-]+\.)+[a-z0-9]{2,7}$/i
},
message: {
selector: $('textarea'),
reg: /^\s+$/
}
};
var handleError = function(element, message, v1) {
if (v1.selector.length > 1) {
var ss = v1.selector;
$(ss).each(function(i, v) {
$(v).removeClass('input-error');
if($(v).val() == ''){
$(v).addClass('input-error');
var $err_msg = $(v).parent('div');
if($(v).parent('div').find('.error').length == 0) {
var error = $('<div class="error"></div>').text(message);
}else{
$(v).parent('div').find('.error').text('');
var error = $(v).parent('div').find('.error').text(message);
$(this).siblings('.error').show();
}
error.appendTo($err_msg);
}else{
$(v).siblings('.error').text('')
}
$(v).keyup(function() {
$(error).fadeOut(1000, function() {
element.removeClass('input-error');
});
});
});
} else {
element.addClass('input-error');
var $err_msg = element.parent('div');
if(element.parent('div').find('.error').length == 0) {
var error = $('<div class="error"></div>').text(message);
}else{
element.parent('div').find('.error').text('');
var error = element.parent('div').find('.error').text(message);
$(this).siblings('.error').show();
}
error.appendTo($err_msg);
element.keyup(function() {
$(error).fadeOut(1000, function() {
element.removeClass('input-error');
});
});
}
};
this.validate = function() {
this.form.submit(function(e) {
for (var i in Elements) {
var type = i;
var validation = Elements[i];
switch (type) {
case 'name':
if (!validation.reg.test(validation.selector.val())) {
handleError(validation.selector, 'Not a valid name.', validation);
}
break;
case 'email':
if (!validation.reg.test(validation.selector.val())) {
handleError(validation.selector, 'Not a valid e-mail address.', validation);
}
break;
case 'message':
if (validation.reg.test(validation.selector.val()) || validation.selector.val() == '') {
handleError(validation.selector, 'Message field cannot be empty.', validation);
}
break;
default:
break;
}
}
e.preventDefault();
});
};
};
var validator = new Validator('#test');
validator.validate();
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