JQ input输入框回车生成标签，可删除，并获取标签的值
程序员文章站
2022-04-10 13:44:21
在网上找的，效果如下 html代码 flat-ui标签
在网上找的，效果如下
html代码
<!doctype html>
<html lang="zh-cn">
<head>
<title>flat-ui标签</title>
<meta charset="utf-8">
<meta http-equiv="x-ua-compatible" content="ie=edge">
<meta name="viewport" content="width=device-width" />
<script src="js/jquery.min.js"></script>
<link rel="stylesheet" type="text/css" href="css/css.css"/>
<script src="js/tagsinput.js" type="text/javascript" charset="utf-8"></script>
</head>
<body>
<div class="box">
<h1 style="text-align: center;margin: 20px 0;margin-top: 200px;">提取input中的标签</h1>
<div class="tagsinput-primary form-group">
<input name="tagsinput" id="tagsinputval" class="tagsinput" data-role="tagsinput" value="faltui,这是一个标签" placeholder="输入后回车"/>
<button class="btn" onclick="getinput()">获取输入的值</button>
</div>
</div>
<script type="text/javascript">
function getinput(){
alert($('#tagsinputval').val());
}
</script>
</body>
</html>
css代码：
*{margin: 0;padding: 0;list-style-type: none;text-decoration: none;}
.box{width: 500px;margin: auto;}
.bootstrap-tagsinput {
background-color: white;
border: 2px solid #ebedef;
border-radius: 6px;
margin-bottom: 18px;
padding: 6px 1px 1px 6px;
text-align: left;
font-size: 0;
}
.bootstrap-tagsinput .badge {
border-radius: 4px;
background-color: #ebedef;
color: #7b8996;
font-size: 13px;
cursor: pointer;
display: inline-block;
position: relative;
vertical-align: middle;
overflow: hidden;
margin: 0 5px 5px 0;
padding: 6px 28px 6px 14px;
transition: .25s linear;
}
.bootstrap-tagsinput .badge > span {
color: white;
padding: 0 10px 0 0;
cursor: pointer;
font-size: 12px;
position: absolute;
right: 0;
text-align: right;
text-decoration: none;
top: 0;
width: 100%;
bottom: 0;
z-index: 2;
}
.bootstrap-tagsinput .badge > span:after {
content: "x";
font-family: "flat-ui-pro-icons";
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
line-height: 27px;
}
@media (hover: hover) {
.bootstrap-tagsinput .badge {
padding: 6px 21px;
}
.bootstrap-tagsinput .badge > span {
opacity: 0;
filter: "alpha(opacity=0)";
transition: opacity .25s linear;
}
.bootstrap-tagsinput .badge:hover {
background-color: #16a085;
color: white;
padding-right: 28px;
padding-left: 14px;
}
.bootstrap-tagsinput .badge:hover > span {
padding: 0 10px 0 0;
opacity: 1;
-webkit-filter: none;
filter: none;
}
}
.bootstrap-tagsinput input[type="text"] {
font-size: 14px;
border: none;
box-shadow: none;
outline: none;
background-color: transparent;
padding: 0;
margin: 0;
width: auto !important;
max-width: inherit;
min-width: 80px;
vertical-align: top;
height: 29px;
color: #34495e;
}
.tagsinput-primary {
margin-bottom: 18px;
}
.tagsinput-primary .bootstrap-tagsinput {
border-color: #1abc9c;
margin-bottom: 0;
}
.tagsinput-primary .badge {
background-color: #1abc9c;
color: white;
}
.btn{background: #1abc9c;border: none;color: #fff;padding: 10px;border-radius: 5px;margin-top: 10px;}
jq代码：
/* bootstrap-tagsinput v0.8.0
*/
(function ($) {
"use strict";
var defaultoptions = {
tagclass: function(item) {
return 'badge badge-info';
},
focusclass: 'focus',
itemvalue: function(item) {
return item ? item.tostring() : item;
},
itemtext: function(item) {
return this.itemvalue(item);
},
itemtitle: function(item) {
return null;
},
freeinput: true,
addonblur: true,
maxtags: undefined,
maxchars: undefined,
confirmkeys: [13, 44],
delimiter: ',',
delimiterregex: null,
cancelconfirmkeysonempty: false,
ontagexists: function(item, $tag) {
$tag.hide().fadein();
},
trimvalue: false,
allowduplicates: false,
triggerchange: true
};
/**
* constructor function
*/
function tagsinput(element, options) {
this.isinit = true;
this.itemsarray = [];
this.$element = $(element);
this.$element.hide();
this.isselect = (element.tagname === 'select');
this.multiple = (this.isselect && element.hasattribute('multiple'));
this.objectitems = options && options.itemvalue;
this.placeholdertext = element.hasattribute('placeholder') ? this.$element.attr('placeholder') : '';
this.inputsize = math.max(1, this.placeholdertext.length);
this.$container = $('<div class="bootstrap-tagsinput"></div>');
this.$input = $('<input type="text" placeholder="' + this.placeholdertext + '"/>').appendto(this.$container);
this.$element.before(this.$container);
this.build(options);
this.isinit = false;
}
tagsinput.prototype = {
constructor: tagsinput,
/**
* adds the given item as a new tag. pass true to dontpushval to prevent
* updating the elements val()
*/
add: function(item, dontpushval, options) {
var self = this;
if (self.options.maxtags && self.itemsarray.length >= self.options.maxtags)
return;
// ignore falsey values, except false
if (item !== false && !item)
return;
// trim value
if (typeof item === "string" && self.options.trimvalue) {
item = $.trim(item);
}
// throw an error when trying to add an object while the itemvalue option was not set
if (typeof item === "object" && !self.objectitems)
throw("can't add objects when itemvalue option is not set");
// ignore strings only containg whitespace
if (item.tostring().match(/^\s*$/))
return;
// if select but not multiple, remove current tag
if (self.isselect && !self.multiple && self.itemsarray.length > 0)
self.remove(self.itemsarray[0]);
if (typeof item === "string" && this.$element[0].tagname === 'input') {
var delimiter = (self.options.delimiterregex) ? self.options.delimiterregex : self.options.delimiter;
var items = item.split(delimiter);
if (items.length > 1) {
for (var i = 0; i < items.length; i++) {
this.add(items[i], true);
}
if (!dontpushval)
self.pushval(self.options.triggerchange);
return;
}
}
var itemvalue = self.options.itemvalue(item),
itemtext = self.options.itemtext(item),
tagclass = self.options.tagclass(item),
itemtitle = self.options.itemtitle(item);
// ignore items allready added
var existing = $.grep(self.itemsarray, function(item) { return self.options.itemvalue(item) === itemvalue; } )[0];
if (existing && !self.options.allowduplicates) {
// invoke ontagexists
if (self.options.ontagexists) {
var $existingtag = $(".badge", self.$container).filter(function() { return $(this).data("item") === existing; });
self.options.ontagexists(item, $existingtag);
}
return;
}
// if length greater than limit
if (self.items().tostring().length + item.length + 1 > self.options.maxinputlength)
return;
// raise beforeitemadd arg
var beforeitemaddevent = $.event('beforeitemadd', { item: item, cancel: false, options: options});
self.$element.trigger(beforeitemaddevent);
if (beforeitemaddevent.cancel)
return;
// register item in internal array and map
self.itemsarray.push(item);
// add a tag element
var $tag = $('<span class="badge ' + htmlencode(tagclass) + (itemtitle !== null ? ('" title="' + itemtitle) : '') + '">' + htmlencode(itemtext) + '<span data-role="remove"></span></span>');
$tag.data('item', item);
self.findinputwrapper().before($tag);
$tag.after(' ');
// check to see if the tag exists in its raw or uri-encoded form
var optionexists = (
$('option[value="' + encodeuricomponent(itemvalue) + '"]', self.$element).length ||
$('option[value="' + htmlencode(itemvalue) + '"]', self.$element).length
);
// add <option /> if item represents a value not present in one of the <select />'s options
if (self.isselect && !optionexists) {
var $option = $('<option selected>' + htmlencode(itemtext) + '</option>');
$option.data('item', item);
$option.attr('value', itemvalue);
self.$element.append($option);
}
if (!dontpushval)
self.pushval(self.options.triggerchange);
// add class when reached maxtags
if (self.options.maxtags === self.itemsarray.length || self.items().tostring().length === self.options.maxinputlength)
self.$container.addclass('bootstrap-tagsinput-max');
// if using typeahead, once the tag has been added, clear the typeahead value so it does not stick around in the input.
if ($('.typeahead, .twitter-typeahead', self.$container).length) {
self.$input.typeahead('val', '');
}
if (this.isinit) {
self.$element.trigger($.event('itemaddedoninit', { item: item, options: options }));
} else {
self.$element.trigger($.event('itemadded', { item: item, options: options }));
}
},
/**
* removes the given item. pass true to dontpushval to prevent updating the
* elements val()
*/
remove: function(item, dontpushval, options) {
var self = this;
if (self.objectitems) {
if (typeof item === "object")
item = $.grep(self.itemsarray, function(other) { return self.options.itemvalue(other) == self.options.itemvalue(item); } );
else
item = $.grep(self.itemsarray, function(other) { return self.options.itemvalue(other) == item; } );
item = item[item.length-1];
}
if (item) {
var beforeitemremoveevent = $.event('beforeitemremove', { item: item, cancel: false, options: options });
self.$element.trigger(beforeitemremoveevent);
if (beforeitemremoveevent.cancel)
return;
$('.badge', self.$container).filter(function() { return $(this).data('item') === item; }).remove();
$('option', self.$element).filter(function() { return $(this).data('item') === item; }).remove();
if($.inarray(item, self.itemsarray) !== -1)
self.itemsarray.splice($.inarray(item, self.itemsarray), 1);
}
if (!dontpushval)
self.pushval(self.options.triggerchange);
// remove class when reached maxtags
if (self.options.maxtags > self.itemsarray.length)
self.$container.removeclass('bootstrap-tagsinput-max');
self.$element.trigger($.event('itemremoved', { item: item, options: options }));
},
/**
* removes all items
*/
removeall: function() {
var self = this;
$('.badge', self.$container).remove();
$('option', self.$element).remove();
while(self.itemsarray.length > 0)
self.itemsarray.pop();
self.pushval(self.options.triggerchange);
},
/**
* refreshes the tags so they match the text/value of their corresponding
* item.
*/
refresh: function() {
var self = this;
$('.badge', self.$container).each(function() {
var $tag = $(this),
item = $tag.data('item'),
itemvalue = self.options.itemvalue(item),
itemtext = self.options.itemtext(item),
tagclass = self.options.tagclass(item);
// update tag's class and inner text
$tag.attr('class', null);
$tag.addclass('badge ' + htmlencode(tagclass));
$tag.contents().filter(function() {
return this.nodetype == 3;
})[0].nodevalue = htmlencode(itemtext);
if (self.isselect) {
var option = $('option', self.$element).filter(function() { return $(this).data('item') === item; });
option.attr('value', itemvalue);
}
});
},
/**
* returns the items added as tags
*/
items: function() {
return this.itemsarray;
},
/**
* assembly value by retrieving the value of each item, and set it on the
* element.
*/
pushval: function() {
var self = this,
val = $.map(self.items(), function(item) {
return self.options.itemvalue(item).tostring();
});
self.$element.val(val, true);
if (self.options.triggerchange)
self.$element.trigger('change');
},
/**
* initializes the tags input behaviour on the element
*/
build: function(options) {
var self = this;
self.options = $.extend({}, defaultoptions, options);
// when itemvalue is set, freeinput should always be false
if (self.objectitems)
self.options.freeinput = false;
makeoptionitemfunction(self.options, 'itemvalue');
makeoptionitemfunction(self.options, 'itemtext');
makeoptionfunction(self.options, 'tagclass');
// typeahead bootstrap version 2.3.2
if (self.options.typeahead) {
var typeahead = self.options.typeahead || {};
makeoptionfunction(typeahead, 'source');
self.$input.typeahead($.extend({}, typeahead, {
source: function (query, process) {
function processitems(items) {
var texts = [];
for (var i = 0; i < items.length; i++) {
var text = self.options.itemtext(items[i]);
map[text] = items[i];
texts.push(text);
}
process(texts);
}
this.map = {};
var map = this.map,
data = typeahead.source(query);
if ($.isfunction(data.success)) {
// support for angular callbacks
data.success(processitems);
} else if ($.isfunction(data.then)) {
// support for angular promises
data.then(processitems);
} else {
// support for functions and jquery promises
$.when(data)
.then(processitems);
}
},
updater: function (text) {
self.add(this.map[text]);
return this.map[text];
},
matcher: function (text) {
return (text.tolowercase().indexof(this.query.trim().tolowercase()) !== -1);
},
sorter: function (texts) {
return texts.sort();
},
highlighter: function (text) {
var regex = new regexp( '(' + this.query + ')', 'gi' );
return text.replace( regex, "<strong>$1</strong>" );
}
}));
}
// typeahead.js
if (self.options.typeaheadjs) {
// determine if main configurations were passed or simply a dataset
var typeaheadjs = self.options.typeaheadjs;
if (!$.isarray(typeaheadjs)) {
typeaheadjs = [null, typeaheadjs];
}
$.fn.typeahead.apply(self.$input, typeaheadjs).on('typeahead:selected', $.proxy(function (obj, datum, name) {
var index = 0;
typeaheadjs.some(function(dataset, _index) {
if (dataset.name === name) {
index = _index;
return true;
}
return false;
});
// @todo dep: https://github.com/corejavascript/typeahead.js/issues/89
if (typeaheadjs[index].valuekey) {
self.add(datum[typeaheadjs[index].valuekey]);
} else {
self.add(datum);
}
self.$input.typeahead('val', '');
}, self));
}
self.$container.on('click', $.proxy(function(event) {
if (! self.$element.attr('disabled')) {
self.$input.removeattr('disabled');
}
self.$input.focus();
}, self));
if (self.options.addonblur && self.options.freeinput) {
self.$input.on('focusout', $.proxy(function(event) {
// hack: only process on focusout when no typeahead opened, to
// avoid adding the typeahead text as tag
if ($('.typeahead, .twitter-typeahead', self.$container).length === 0) {
self.add(self.$input.val());
self.$input.val('');
}
}, self));
}
// toggle the 'focus' css class on the container when it has focus
self.$container.on({
focusin: function() {
self.$container.addclass(self.options.focusclass);
},
focusout: function() {
self.$container.removeclass(self.options.focusclass);
},
});
self.$container.on('keydown', 'input', $.proxy(function(event) {
var $input = $(event.target),
$inputwrapper = self.findinputwrapper();
if (self.$element.attr('disabled')) {
self.$input.attr('disabled', 'disabled');
return;
}
switch (event.which) {
// backspace
case 8:
if (dogetcaretposition($input[0]) === 0) {
var prev = $inputwrapper.prev();
if (prev.length) {
self.remove(prev.data('item'));
}
}
break;
// delete
case 46:
if (dogetcaretposition($input[0]) === 0) {
var next = $inputwrapper.next();
if (next.length) {
self.remove(next.data('item'));
}
}
break;
// left arrow
case 37:
// try to move the input before the previous tag
var $prevtag = $inputwrapper.prev();
if ($input.val().length === 0 && $prevtag[0]) {
$prevtag.before($inputwrapper);
$input.focus();
}
break;
// right arrow
case 39:
// try to move the input after the next tag
var $nexttag = $inputwrapper.next();
if ($input.val().length === 0 && $nexttag[0]) {
$nexttag.after($inputwrapper);
$input.focus();
}
break;
default:
// ignore
}
// reset internal input's size
var textlength = $input.val().length,
wordspace = math.ceil(textlength / 5),
size = textlength + wordspace + 1;
$input.attr('size', math.max(this.inputsize, size));
}, self));
self.$container.on('keypress', 'input', $.proxy(function(event) {
var $input = $(event.target);
if (self.$element.attr('disabled')) {
self.$input.attr('disabled', 'disabled');
return;
}
var text = $input.val(),
maxlengthreached = self.options.maxchars && text.length >= self.options.maxchars;
if (self.options.freeinput && (keycombinationinlist(event, self.options.confirmkeys) || maxlengthreached)) {
// only attempt to add a tag if there is data in the field
if (text.length !== 0) {
self.add(maxlengthreached ? text.substr(0, self.options.maxchars) : text);
$input.val('');
}
// if the field is empty, let the event triggered fire as usual
if (self.options.cancelconfirmkeysonempty === false) {
event.preventdefault();
}
}
// reset internal input's size
var textlength = $input.val().length,
wordspace = math.ceil(textlength / 5),
size = textlength + wordspace + 1;
$input.attr('size', math.max(this.inputsize, size));
}, self));
// remove icon clicked
self.$container.on('click', '[data-role=remove]', $.proxy(function(event) {
if (self.$element.attr('disabled')) {
return;
}
self.remove($(event.target).closest('.badge').data('item'));
}, self));
// only add existing value as tags when using strings as tags
if (self.options.itemvalue === defaultoptions.itemvalue) {
if (self.$element[0].tagname === 'input') {
self.add(self.$element.val());
} else {
$('option', self.$element).each(function() {
self.add($(this).attr('value'), true);
});
}
}
},
/**
* removes all tagsinput behaviour and unregsiter all event handlers
*/
destroy: function() {
var self = this;
// unbind events
self.$container.off('keypress', 'input');
self.$container.off('click', '[role=remove]');
self.$container.remove();
self.$element.removedata('tagsinput');
self.$element.show();
},
/**
* sets focus on the tagsinput
*/
focus: function() {
this.$input.focus();
},
/**
* returns the internal input element
*/
input: function() {
return this.$input;
},
/**
* returns the element which is wrapped around the internal input. this
* is normally the $container, but typeahead.js moves the $input element.
*/
findinputwrapper: function() {
var elt = this.$input[0],
container = this.$container[0];
while(elt && elt.parentnode !== container)
elt = elt.parentnode;
return $(elt);
}
};
/**
* register jquery plugin
*/
$.fn.tagsinput = function(arg1, arg2, arg3) {
var results = [];
this.each(function() {
var tagsinput = $(this).data('tagsinput');
// initialize a new tags input
if (!tagsinput) {
tagsinput = new tagsinput(this, arg1);
$(this).data('tagsinput', tagsinput);
results.push(tagsinput);
if (this.tagname === 'select') {
$('option', $(this)).attr('selected', 'selected');
}
// init tags from $(this).val()
$(this).val($(this).val());
} else if (!arg1 && !arg2) {
// tagsinput already exists
// no function, trying to init
results.push(tagsinput);
} else if(tagsinput[arg1] !== undefined) {
// invoke function on existing tags input
if(tagsinput[arg1].length === 3 && arg3 !== undefined){
var retval = tagsinput[arg1](arg2, null, arg3);
}else{
var retval = tagsinput[arg1](arg2);
}
if (retval !== undefined)
results.push(retval);
}
});
if ( typeof arg1 == 'string') {
// return the results from the invoked function calls
return results.length > 1 ? results : results[0];
} else {
return results;
}
};
$.fn.tagsinput.constructor = tagsinput;
/**
* most options support both a string or number as well as a function as
* option value. this function makes sure that the option with the given
* key in the given options is wrapped in a function
*/
function makeoptionitemfunction(options, key) {
if (typeof options[key] !== 'function') {
var propertyname = options[key];
options[key] = function(item) { return item[propertyname]; };
}
}
function makeoptionfunction(options, key) {
if (typeof options[key] !== 'function') {
var value = options[key];
options[key] = function() { return value; };
}
}
/**
* htmlencodes the given value
*/
var htmlencodecontainer = $('<div />');
function htmlencode(value) {
if (value) {
return htmlencodecontainer.text(value).html();
} else {
return '';
}
}
/**
* returns the position of the caret in the given input field
* http://flightschool.acylt.com/devnotes/caret-position-woes/
*/
function dogetcaretposition(ofield) {
var icaretpos = 0;
if (document.selection) {
ofield.focus ();
var osel = document.selection.createrange();
osel.movestart ('character', -ofield.value.length);
icaretpos = osel.text.length;
} else if (ofield.selectionstart || ofield.selectionstart == '0') {
icaretpos = ofield.selectionstart;
}
return (icaretpos);
}
/**
* returns boolean indicates whether user has pressed an expected key combination.
* @param object keypressevent: javascript event object, refer
* http://www.w3.org/tr/2003/wd-dom-level-3-events-20030331/ecma-script-binding.html
* @param object lookuplist: expected key combinations, as in:
* [13, {which: 188, shiftkey: true}]
*/
function keycombinationinlist(keypressevent, lookuplist) {
var found = false;
$.each(lookuplist, function (index, keycombination) {
if (typeof (keycombination) === 'number' && keypressevent.which === keycombination) {
found = true;
return false;
}
if (keypressevent.which === keycombination.which) {
var alt = !keycombination.hasownproperty('altkey') || keypressevent.altkey === keycombination.altkey,
shift = !keycombination.hasownproperty('shiftkey') || keypressevent.shiftkey === keycombination.shiftkey,
ctrl = !keycombination.hasownproperty('ctrlkey') || keypressevent.ctrlkey === keycombination.ctrlkey;
if (alt && shift && ctrl) {
found = true;
return false;
}
}
});
return found;
}
/**
* initialize tagsinput behaviour on inputs and selects which have
* data-role=tagsinput
* zmm2113@qq.com 2018.6.24
*/
$(function() {
$("input[data-role=tagsinput], select[multiple][data-role=tagsinput]").tagsinput();
});
})(window.jquery);