带参数的Javascript字符计数器函数
我是javascript初学者,我在某个地方找到了我的EditorFor字符计数器,下面是它在代码中的外观:带参数的Javascript字符计数器函数,javascript,asp.net-mvc,counter,Javascript,Asp.net Mvc,Counter,我是javascript初学者,我在某个地方找到了我的EditorFor字符计数器,下面是它在代码中的外观: <span class="text-length-counter" id="email_counter"></span> @Html.EditorFor(model => model.ProfileFormDto.Email, new { htmlAttributes = new { @class = "form-con
<span class="text-length-counter" id="email_counter"></span>
@Html.EditorFor(model => model.ProfileFormDto.Email, new { htmlAttributes = new { @class = "form-control create-view-field", id="email_area" }})
它工作正常,但我必须修改这个函数(),因为我必须在一个页面上使用多个计数器,所以上面的函数必须有三个参数,比如:Count(counter,area,max)。我无法管理这个。第节中有我的新函数声明:
$(document).ready(function () {
Count('email_counter','email_area',50);
});
function Count(counter,area,max) {
var text_length = $('#area').val().length;
$('#counter').html(text_length +' / ' + max + ' znaków');
$('#area').keyup(function() {
var text_length = $('#area').val().length;
$('#counter').html(text_length + ' / ' + max + ' znaków');
});
};
它不工作,我得到错误:
管理:169未捕获类型错误:无法读取未定义的属性“长度”选择器文本不正确
Count('email_counter','email_area',50);
function Count(counter, area, max) {
var text_length = $('#' + area).val().length;
...
$('#' + counter).html(text_length +' / ' + max + ' znaków');
}
您的jQuery选择器当前正在尝试选择id=“area”和id=“counter”的元素 如果要将面积和计数器转换为参数,则需要使用$('#'+面积)和$('#'+计数器)进行选择 通过此更新,您的代码将如下所示
function Count(counter, area, max) {
var text_length = $('#'+area).val().length;
$('#'+counter).html(text_length +' / ' + max + ' znaków');
$('#'+area).keyup(function() {
var text_length = $('#'+area).val().length;
$('#'+counter).html(text_length + ' / ' + max + ' znaków');
});
};
具有多个输入字段
function Count(counter, area, max) {
var text_length = $('#'+area).val().length;
$('#'+counter).html(text_length +' / ' + max + ' znaków');
$('#'+area).keyup(function() {
var text_length = $('#'+area).val().length;
$('#'+counter).html(text_length + ' / ' + max + ' znaków');
});
};