我在使用此功能（在输入中输入多封电子邮件）时出现问题https://github.com/pierresh/multiple-emails.js/tree/master
问题是，当我在输入字段上输入占位符文本时，它会显示几秒然后消失，我已经尝试找出js和css文件中的问题但是我仍然找不到导致占位符的原因文字消失。
我尝试在很多地方添加此代码，但文本仍然消失
$("#emailInviteList").attr("placeholder", "Friend's email").blur();
这是multiple-emails.js
(function( $ ){
$.fn.multiple_emails = function(options) {
// Default options
var defaults = {
checkDupEmail: true,
theme: "Bootstrap",
position: "top"
};
// Merge send options with defaults
var settings = $.extend( {}, defaults, options );
var deleteIconHTML = "";
if (settings.theme.toLowerCase() == "Bootstrap".toLowerCase())
{
deleteIconHTML = '<a href="#" class="multiple_emails-close" title="Remove"><span class="glyphicon glyphicon-remove"></span></a>';
}
else if (settings.theme.toLowerCase() == "SemanticUI".toLowerCase() || settings.theme.toLowerCase() == "Semantic-UI".toLowerCase() || settings.theme.toLowerCase() == "Semantic UI".toLowerCase()) {
deleteIconHTML = '<a href="#" class="multiple_emails-close" title="Remove"><i class="remove icon"></i></a>';
}
else if (settings.theme.toLowerCase() == "Basic".toLowerCase()) {
//Default which you should use if you don't use Bootstrap, SemanticUI, or other CSS frameworks
deleteIconHTML = '<a href="#" class="multiple_emails-close" title="Remove"><i class="basicdeleteicon">Remove</i></a>';
}
return this.each(function() {
//$orig refers to the input HTML node
var $orig = $(this);
var $list = $('<ul class="multiple_emails-ul" />'); // create html elements - list of email addresses as unordered list
if ($(this).val() != '' && IsJsonString($(this).val())) {
$.each(jQuery.parseJSON($(this).val()), function( index, val ) {
$list.append($('<li class="multiple_emails-email"><span class="email_name" data-email="' + val.toLowerCase() + '">' + val + '</span></li>')
.prepend($(deleteIconHTML)
.click(function(e) { $(this).parent().remove(); refresh_emails(); e.preventDefault(); })
)
);
});
}
var $input = $('<input type="text" class="multiple_emails-input text-left" />').on('keyup', function(e) { // input
$(this).removeClass('multiple_emails-error');
var input_length = $(this).val().length;
var keynum;
if(window.event){ // IE
keynum = e.keyCode;
}
else if(e.which){ // Netscape/Firefox/Opera
keynum = e.which;
}
//if(event.which == 8 && input_length == 0) { $list.find('li').last().remove(); } //Removes last item on backspace with no input
// Supported key press is tab, enter, space or comma, there is no support for semi-colon since the keyCode differs in various browsers
if(keynum == 9 || keynum == 32 || keynum == 188) {
display_email($(this), settings.checkDupEmail);
}
else if (keynum == 13) {
display_email($(this), settings.checkDupEmail);
//Prevents enter key default
//This is to prevent the form from submitting with the submit button
//when you press enter in the email textbox
e.preventDefault();
}
}).on('blur', function(event){
if ($(this).val() != '') { display_email($(this), settings.checkDupEmail); }
});
var $container = $('<div class="multiple_emails-container" />').click(function() { $input.focus(); } ); // container div
// insert elements into DOM
if (settings.position.toLowerCase() === "top")
$container.append($list).append($input).insertAfter($(this));
else
$container.append($input).append($list).insertBefore($(this));
/*
t is the text input device.
Value of the input could be a long line of copy-pasted emails, not just a single email.
As such, the string is tokenized, with each token validated individually.
If the dupEmailCheck variable is set to true, scans for duplicate emails, and invalidates input if found.
Otherwise allows emails to have duplicated values if false.
*/
function display_email(t, dupEmailCheck) {
//Remove space, comma and semi-colon from beginning and end of string
//Does not remove inside the string as the email will need to be tokenized using space, comma and semi-colon
var arr = t.val().trim().replace(/^,|,$/g , '').replace(/^;|;$/g , '');
//Remove the double quote
arr = arr.replace(/"/g,"");
//Split the string into an array, with the space, comma, and semi-colon as the separator
arr = arr.split(/[\s,;]+/);
var errorEmails = new Array(); //New array to contain the errors
var pattern = new RegExp(/^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?$/i);
for (var i = 0; i < arr.length; i++) {
//Check if the email is already added, only if dupEmailCheck is set to true
if ( dupEmailCheck === true && $orig.val().indexOf(arr[i]) != -1 ) {
if (arr[i] && arr[i].length > 0) {
new function () {
var existingElement = $list.find('.email_name[data-email=' + arr[i].toLowerCase().replace('.', '\\.').replace('@', '\\@') + ']');
existingElement.css('font-weight', 'bold');
setTimeout(function() { existingElement.css('font-weight', ''); }, 1500);
}(); // Use a IIFE function to create a new scope so existingElement won't be overriden
}
}
else if (pattern.test(arr[i]) == true) {
$list.append($('<li class="multiple_emails-email"><span class="email_name" data-email="' + arr[i].toLowerCase() + '">' + arr[i] + '</span></li>')
.prepend($(deleteIconHTML)
.click(function(e) { $(this).parent().remove(); refresh_emails(); e.preventDefault(); })
)
);
}
else
errorEmails.push(arr[i]);
}
// If erroneous emails found, or if duplicate email found
if(errorEmails.length > 0)
t.val(errorEmails.join("; ")).addClass('multiple_emails-error');
else
t.val("");
refresh_emails ();
}
function refresh_emails () {
var emails = new Array();
var container = $orig.siblings('.multiple_emails-container');
container.find('.multiple_emails-email span.email_name').each(function() { emails.push($(this).html()); });
$orig.val(JSON.stringify(emails)).trigger('change');
}
function IsJsonString(str) {
try { JSON.parse(str); }
catch (e) { return false; }
return true;
}
return $(this).hide();
});
};
})(jQuery);
这是multiple-emails.css
.multiple_emails-container {
border:1px #ccc solid;
border-radius: 4px;
box-shadow: inset 0 1px 1px rgba(0,0,0,.075);
padding:0; margin: 0; cursor:text; width:100%;
padding-top: 5px;
background-color: white;
}
.multiple_emails-container input {
clear:both;
width:100%;
height: 30px;
text-align: center;
border:0;
outline: none;
margin-bottom:3px;
padding-left: 5px;
box-sizing: border-box;
}
.multiple_emails-container input{
border: 0 !important;
}
.multiple_emails-container input.multiple_emails-error {
box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 6px red !important;
outline: thin auto red !important;
}
.multiple_emails-container ul {
list-style-type:none;
padding-left: 0;
}
.multiple_emails-email {
margin: 3px 5px 3px 5px;
padding: 3px 5px 3px 5px;
border:1px #BBD8FB solid;
border-radius: 3px;
background: #F3F7FD;
}
.multiple_emails-close {
float:left;
margin:0 3px;
}
这是我在html文件中的代码的一部分
<script type="text/javascript">
$(function() {
$('#emailInviteList').multiple_emails({position: "bottom"});
});
</script>
<div class='form-group'>
<input type='email' id='emailInviteList' name='emailInviteList' class="form-control" placeholder="Friend's Email">
</div>
答案 0 :(得分：2)
脚本正在创建另一个没有placeholder属性的文本字段，下面是我刚刚在输入placeholder="Friend\'s Email"中添加了var $input的更新代码段。
(function( $ ){
$.fn.multiple_emails = function(options) {
// Default options
var defaults = {
checkDupEmail: true,
theme: "Bootstrap",
position: "top"
};
// Merge send options with defaults
var settings = $.extend( {}, defaults, options );
var deleteIconHTML = "";
if (settings.theme.toLowerCase() == "Bootstrap".toLowerCase())
{
deleteIconHTML = '<a href="#" class="multiple_emails-close" title="Remove"><span class="glyphicon glyphicon-remove"></span></a>';
}
else if (settings.theme.toLowerCase() == "SemanticUI".toLowerCase() || settings.theme.toLowerCase() == "Semantic-UI".toLowerCase() || settings.theme.toLowerCase() == "Semantic UI".toLowerCase()) {
deleteIconHTML = '<a href="#" class="multiple_emails-close" title="Remove"><i class="remove icon"></i></a>';
}
else if (settings.theme.toLowerCase() == "Basic".toLowerCase()) {
//Default which you should use if you don't use Bootstrap, SemanticUI, or other CSS frameworks
deleteIconHTML = '<a href="#" class="multiple_emails-close" title="Remove"><i class="basicdeleteicon">Remove</i></a>';
}
return this.each(function() {
//$orig refers to the input HTML node
var $orig = $(this);
var $list = $('<ul class="multiple_emails-ul" />'); // create html elements - list of email addresses as unordered list
if ($(this).val() != '' && IsJsonString($(this).val())) {
$.each(jQuery.parseJSON($(this).val()), function( index, val ) {
$list.append($('<li class="multiple_emails-email"><span class="email_name" data-email="' + val.toLowerCase() + '">' + val + '</span></li>')
.prepend($(deleteIconHTML)
.click(function(e) { $(this).parent().remove(); refresh_emails(); e.preventDefault(); })
)
);
});
}
var $input = $('<input type="text" class="multiple_emails-input text-left" placeholder="Friend\'s Email" />').on('keyup', function(e) { // input
$(this).removeClass('multiple_emails-error');
var input_length = $(this).val().length;
var keynum;
if(window.event){ // IE
keynum = e.keyCode;
}
else if(e.which){ // Netscape/Firefox/Opera
keynum = e.which;
}
//if(event.which == 8 && input_length == 0) { $list.find('li').last().remove(); } //Removes last item on backspace with no input
// Supported key press is tab, enter, space or comma, there is no support for semi-colon since the keyCode differs in various browsers
if(keynum == 9 || keynum == 32 || keynum == 188) {
display_email($(this), settings.checkDupEmail);
}
else if (keynum == 13) {
display_email($(this), settings.checkDupEmail);
//Prevents enter key default
//This is to prevent the form from submitting with the submit button
//when you press enter in the email textbox
e.preventDefault();
}
}).on('blur', function(event){
if ($(this).val() != '') { display_email($(this), settings.checkDupEmail); }
});
var $container = $('<div class="multiple_emails-container" />').click(function() { $input.focus(); } ); // container div
// insert elements into DOM
if (settings.position.toLowerCase() === "top")
$container.append($list).append($input).insertAfter($(this));
else
$container.append($input).append($list).insertBefore($(this));
/*
t is the text input device.
Value of the input could be a long line of copy-pasted emails, not just a single email.
As such, the string is tokenized, with each token validated individually.
If the dupEmailCheck variable is set to true, scans for duplicate emails, and invalidates input if found.
Otherwise allows emails to have duplicated values if false.
*/
function display_email(t, dupEmailCheck) {
//Remove space, comma and semi-colon from beginning and end of string
//Does not remove inside the string as the email will need to be tokenized using space, comma and semi-colon
var arr = t.val().trim().replace(/^,|,$/g , '').replace(/^;|;$/g , '');
//Remove the double quote
arr = arr.replace(/"/g,"");
//Split the string into an array, with the space, comma, and semi-colon as the separator
arr = arr.split(/[\s,;]+/);
var errorEmails = new Array(); //New array to contain the errors
var pattern = new RegExp(/^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?$/i);
for (var i = 0; i < arr.length; i++) {
//Check if the email is already added, only if dupEmailCheck is set to true
if ( dupEmailCheck === true && $orig.val().indexOf(arr[i]) != -1 ) {
if (arr[i] && arr[i].length > 0) {
new function () {
var existingElement = $list.find('.email_name[data-email=' + arr[i].toLowerCase().replace('.', '\\.').replace('@', '\\@') + ']');
existingElement.css('font-weight', 'bold');
setTimeout(function() { existingElement.css('font-weight', ''); }, 1500);
}(); // Use a IIFE function to create a new scope so existingElement won't be overriden
}
}
else if (pattern.test(arr[i]) == true) {
$list.append($('<li class="multiple_emails-email"><span class="email_name" data-email="' + arr[i].toLowerCase() + '">' + arr[i] + '</span></li>')
.prepend($(deleteIconHTML)
.click(function(e) { $(this).parent().remove(); refresh_emails(); e.preventDefault(); })
)
);
}
else
errorEmails.push(arr[i]);
}
// If erroneous emails found, or if duplicate email found
if(errorEmails.length > 0)
t.val(errorEmails.join("; ")).addClass('multiple_emails-error');
else
t.val("");
refresh_emails ();
}
function refresh_emails () {
var emails = new Array();
var container = $orig.siblings('.multiple_emails-container');
container.find('.multiple_emails-email span.email_name').each(function() { emails.push($(this).html()); });
$orig.val(JSON.stringify(emails)).trigger('change');
}
function IsJsonString(str) {
try { JSON.parse(str); }
catch (e) { return false; }
return true;
}
return $(this).hide();
});
};
})(jQuery); .multiple_emails-container {
border:1px #ccc solid;
border-radius: 4px;
box-shadow: inset 0 1px 1px rgba(0,0,0,.075);
padding:0; margin: 0; cursor:text; width:100%;
padding-top: 5px;
background-color: white;
}
.multiple_emails-container input {
clear:both;
width:100%;
height: 30px;
text-align: center;
border:0;
outline: none;
margin-bottom:3px;
padding-left: 5px;
box-sizing: border-box;
}
.multiple_emails-container input{
border: 0 !important;
}
.multiple_emails-container input.multiple_emails-error {
box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 6px red !important;
outline: thin auto red !important;
}
.multiple_emails-container ul {
list-style-type:none;
padding-left: 0;
}
.multiple_emails-email {
margin: 3px 5px 3px 5px;
padding: 3px 5px 3px 5px;
border:1px #BBD8FB solid;
border-radius: 3px;
background: #F3F7FD;
}
.multiple_emails-close {
float:left;
margin:0 3px;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script type="text/javascript">
$(function() {
$('#emailInviteList').multiple_emails({position: "bottom"});
});
</script>
<div class='form-group'>
<input type='email' id='emailInviteList' name='emailInviteList' class="form-control" placeholder="Friend's Email">
</div>