我在<ul>
标记内有一个单词列表,当用户点击<li>
元素时,我正试图在textarea中添加该单词。这个词被正确添加,但是如果用户点击同一个<li>
元素,我正试图从textarea中删除该单词。
<ul>
<li>Word One</li>
<li>Word deux</li>
<li>Other Word three</li>
<li>yet another Word 4</li>
</ul>
<textarea id="list" rows="4" cols="20"></textarea>
的jQuery
jQuery(document).ready(function() {
// removing the textarea value when window is loaded again
// otherwise for some reason all the values entered before are still there ?
jQuery(window).load(function() {
jQuery('#list').val('');
})
jQuery('ul li').click(function(addWord) {
var choice = jQuery.trim($(this).text());
var textArea = jQuery("#list");
// if the <li> with the word was allready clicked, then remove its "selected" class
if (jQuery(this).hasClass('selected')) {
jQuery(this).removeClass('selected');
//textArea.replace(choice,'');
} else {
// add class selected to the clicked <li> word, add the word to the textarea
jQuery(this).addClass('selected');
textArea.val(textArea.val() + choice + ' , ').text(textArea.val());
}
});
}
答案 0 :(得分:3)
删除selected
课程时需要替换文本。这里使用.val(function)
。
jQuery(document).ready(function() {
jQuery('ul li').click(function(addWord) {
var choice = jQuery.trim($(this).text());
var textArea = jQuery("#list");
// if the <li> with the word was allready clicked, then remove its "selected" class
if (jQuery(this).hasClass('selected')) {
jQuery(this).removeClass('selected');
textArea.val(function(_, val) {
return val.replace(choice + ' , ', '');
});
} else {
// add class selected to the clicked <li> word, add the word to the textarea
jQuery(this).addClass('selected');
textArea.val(function(_, val) {
return val + choice + ' , ';
});
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul>
<li>Word One</li>
<li>Word deux</li>
<li>Other Word three</li>
<li>yet another Word 4</li>
</ul>
<textarea id="list" rows="4" cols="20"></textarea>