我正在练习jQuery插件
我创建了这个插件:
(function ($) {
'use strict';
$.fn.characterCounter = function () {
return this.each(function (index, item) {
$(item).keyup(function updateCharCounter() {
var $me = $(this),
maxLength = parseInt($me.attr('maxlength'), 10),
charCount = $me.val().length,
$counter = $me.siblings('.limit');
$counter.text('limit: ' + maxLength + ' characters. remaining: ' + (maxLength - charCount));
});
});
};
})(jQuery);
和我的HTML代码:
<div class="form-group">
<textarea id="short-message" maxlength="100" cols="8"></textarea>
<p class="limit">limit: 100 characters</p>
</div>
<div class="form-group">
<textarea id="short-shory" maxlength="150" cols="8"></textarea>
<p class="limit">limit: 150 characters</p>
</div>
<div class="form-group">
<input id="nickname" maxlength="50" size="32"/>
<p class="limit">limit: 50 characters</p>
</div>
<script src="~/Scripts/jquery-1.10.2.js"></script>
<script src="~/Scripts/showCharacterCharlimit.js"></script>
<script>
$(document)
.ready(function() {
'use strict';
$('textarea').characterCounter();
});
</script>
但是给我这个错误:
TypeError:$(...)。characterCounter不是函数
我不知道为什么,有人可以帮助我吗?
答案 0 :(得分:0)
(function ($) {
'use strict';
$.fn.characterCounter = function () {
return this.each(function (index, item) {
$(item).keyup(function updateCharCounter() {
var $me = $(this),
maxLength = parseInt($me.attr('maxlength'), 10),
charCount = $me.val().length,
$counter = $me.siblings('.limit');
$counter.text('limit: ' + maxLength + ' characters. remaining: ' + (maxLength - charCount));
});
});
};
})(jQuery);
&#13;
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="form-group">
<textarea id="short-message" class="wordcount" maxlength="100" cols="8"></textarea>
<p class="limit">limit: 100 characters</p>
</div>
<div class="form-group">
<textarea id="short-shory" class="wordcount" maxlength="150" cols="8"></textarea>
<p class="limit">limit: 150 characters</p>
</div>
<div class="form-group">
<input id="nickname" class="wordcount" maxlength="50" size="32"/>
<p class="limit">limit: 50 characters</p>
</div>
<script>
$(document)
.ready(function() {
'use strict';
$('.wordcount').characterCounter();
});
</script>
&#13;
请检查,你有一个jquery依赖所以你需要为此添加jquery。 我使用 Common Class 以便它适用于所有类型的输入字段。
谢谢