通过onclick添加和删除多个标签到textarea [英] add and remove multiple tag by onclick to textarea
问题描述
我有一个带有textarea的表单和来自数据库的标签列表(已经在textarea下查询和显示),并希望在textarea上添加这些标签(用逗号分隔),如果用户点击后标签已经存在则删除他们。
我想我知道你的意思,请看看这个小提琴
http://jsfiddle.net/joevallender/QyqYW/1/
代码如下。 标签
将来自服务器, selectedTags
是当前选择的托管数组。如果需要编辑现有标记的帖子,则可以将数据从服务器加载到 selectedTags
中。如果你这样做了,你可以将 click()
函数中的代码重构为它自己的函数,以便它也可以在文档上运行。
我已经包含了一些类切换和一个调试屏幕,所以您可以看到发生了什么。
HTML
< textarea id =tags>< / textarea>
< div id =tagButtons>< / div>
< div id =debug>< / div>
和JavaScript
var tags = [
'JavaScript',
'jQuery',
'HTML5',
'CSS3'
];
var selectedTags = []; (var i = 0; i< tags.length; i ++){
var el = $('< span>)。text(tags [i]);
。
$('#tagButtons')。append(el);
$ b $('#tagButtons span')。click(function(){
var val = $(this).text();
var index = selectedTags.indexOf(val);
if(index> -1){
var removed = selectedTags.splice(index,1);
$(this).removeClass('selected ');
$('#debug')。prepend($('< div>)。html('Removed:'+ removed));
} else {
selectedTags .push(val);
$(this).addClass('selected');
$('#debug')。prepend($('< div>)。html('Added (','));
});
}
$
编辑这是一个可以在两个方向上工作的方法 http://jsfiddle.net/joevallender/QyqYW/14/
I have a form with a textarea and list of tags from database( already queried and displayed under the textarea ) and want to add these tags (seperated by comma) on textarea and remove if the tag is already there as user click on them.
I think I know what you mean, please have a look at this fiddle http://jsfiddle.net/joevallender/QyqYW/1/
The code is below. tags
would come from the server and selectedTags
is the managed array of current selections. you could load data from the server into selectedTags
too if necessary, if for instance editing an existing tagged post. If you did this, you'd refactor the code in the click()
function out to its own function so it could be run on document ready too.
I've included some class toggling and a debug screen so you can see what is going on.
HTML
<textarea id="tags"></textarea>
<div id="tagButtons"></div>
<div id="debug"></div>
and JavaScript
var tags = [
'JavaScript',
'jQuery',
'HTML5',
'CSS3'
];
var selectedTags = [];
for(var i = 0; i < tags.length; i++) {
var el = $('<span>').text(tags[i]);
$('#tagButtons').append(el);
}
$('#tagButtons span').click(function(){
var val = $(this).text();
var index = selectedTags.indexOf(val);
if(index > -1) {
var removed = selectedTags.splice(index,1);
$(this).removeClass('selected');
$('#debug').prepend($('<div>').html('Removed: ' + removed));
} else {
selectedTags.push(val);
$(this).addClass('selected');
$('#debug').prepend($('<div>').html('Added: ' + val));
}
$('#tags').val(selectedTags.join(', '));
});
EDIT Here is one that works in both directions http://jsfiddle.net/joevallender/QyqYW/14/
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