数组 "sometimes" 未定义
Array "sometimes" not defined
我正在尝试实现一个按钮,该按钮将从用户选择的事件集中删除事件。现在为了排除故障,我在页面中硬编码了 5 个事件,但最终它们是从 localStorage 调用的。删除按钮应该从 localStorage 和页面中删除元素。我的问题是当没有按顺序点击删除按钮时它会抛出一个错误。任何和所有的帮助表示赞赏。要查看错误,请打开控制台。这是 fiddle:http://jsfiddle.net/roob/65j6ktnL/
这是代码的更短版本:
<div id="result">
<div class="10am target-stage stage-only saturday eventer" id="row0" rel="0">
<table border="0" cellspacing="0" cellpadding="0" style="border:none;">
<tr>
<td valign="top" align="left" class="ev-time" style="border:none;">10:30 a.m.</td>
<td valign="top" class="ev-desc">
<span class="info"><p class="ev-date">SATURDAY, APRIL. 18, 2015<br /><span class="ev-title"><b>Children’s Stage</b></span><br /><span class="ev-signings">Signing Area 1</span></p></span>
<span class="info-body"><b>Anna Dewdney, </b>Author of<em> NELLY GNU AND DADDY TOO</em></span>
<span class="info-btn"><p class="selctor" rel="0"><span class="addSchd"><a href="#"><b>+ MY SCHEDULE</b></a></span>
<span class="mapit" ><a href="#"><b>map</b></a></span>
<span class="premove hidden" rel="0"><a href="#">Remove</a></span></p></span></td>
</tr>
</table>
</div>
<div class="11am target-stage stage-only saturday eventer" id="row1" rel="1">
<table border="0" cellspacing="0" cellpadding="0" style="border:none;">
<tr>
<td valign="top" align="left" class="ev-time" style="border:none;">11:00 a.m. </td>
<td valign="top" class="ev-desc">
<span class="info"><p class="ev-date">SATURDAY, APRIL. 18, 2015<br /><span class="ev-title"><b>Children’s Stage</b></span></p></span>
<span class="info-body"><b>Yuyi Morales, </b>Author of<em> NIÑO WRESTLES THE WORLD</em></span>
<span class="info-btn"><p class="selctor" rel="1"> <span class="addSchd"><a href="#"><b>+ MY SCHEDULE</b></a></span>
<span class="mapit" > <a href="#"><b>map</b></a></span>
<span class="premove hidden" rel="1"><a href="#">Remove</a></span></p></span></td>
</tr>
</table>
</div>
<div class="11am target-stage stage-only saturday eventer" id="row2" rel="2">
<table border="0" cellspacing="0" cellpadding="0" style="border:none;">
<tr>
<td valign="top" align="left" class="ev-time" style="border:none;">11:30 a.m. </td>
<td valign="top" class="ev-desc">
<span class="info"><p class="ev-date">SATURDAY, APRIL. 18, 2015<br /><span class="ev-title"><b>Children’s Stage</b></span><br /><span class="ev-signings">Signing Area 4</span></p></span>
<span class="info-body"><em>Scooby-Doo and the Carnival Creep,</em> presented by <b>Warner Bros. Consumer Products</b></span>
<span class="info-btn"><p class="selctor" rel="2"> <span class="addSchd"><a href="#"><b>+ MY SCHEDULE</b></a></span>
<span class="mapit"><a href="#"><b>map</b></a></span>
<span class="premove hidden" rel="2"><a href="#">Remove</a></span></p></span></td>
</tr>
</table>
</div></div>
<script>
$(document).ready(function(){
var storaged = Object.keys(localStorage);
var storageLength = storaged.length;
for (var i=0; i<storageLength; i++)
{
var el = $(localStorage[storaged[i]]);
$("#result").append(el);
}
$("#buttn2").click(function(){
localStorage.clear();
$("#result").html('');
console.log("Storage is cleared");
});
$(".premove").click(function (event) {
event.preventDefault();
var a=$(this).attr("rel");
console.log(a);
var eventsArray = document.getElementsByClassName("eventer");
var eventSelctd=(eventsArray[a]).outerHTML;
localStorage.removeItem("schedule " + a, eventSelctd);
eventsArray[a].outerHTML="";
});
});
</script>
您将 rel=(number)
添加到列表中的每个项目,并使用该数字在 document.getElementsByClassName("eventer")
定义的数组中获取其引用 - 每次删除一个项目时,数组都会变短,因为删除的项目现在消失了,你每次点击删除按钮都会重新定义它。发生的情况是您最终开始寻找第 4 项,但它不存在,因为列表中只存在两项。
另一种方法是查找最靠近您的按钮的元素并将其删除。
var eventSelected = $(this).closest('.eventer');
localStorage.removeItem("schedule " + a, eventSelected[0]);
eventSelected.remove();
我正在尝试实现一个按钮,该按钮将从用户选择的事件集中删除事件。现在为了排除故障,我在页面中硬编码了 5 个事件,但最终它们是从 localStorage 调用的。删除按钮应该从 localStorage 和页面中删除元素。我的问题是当没有按顺序点击删除按钮时它会抛出一个错误。任何和所有的帮助表示赞赏。要查看错误,请打开控制台。这是 fiddle:http://jsfiddle.net/roob/65j6ktnL/
这是代码的更短版本:
<div id="result">
<div class="10am target-stage stage-only saturday eventer" id="row0" rel="0">
<table border="0" cellspacing="0" cellpadding="0" style="border:none;">
<tr>
<td valign="top" align="left" class="ev-time" style="border:none;">10:30 a.m.</td>
<td valign="top" class="ev-desc">
<span class="info"><p class="ev-date">SATURDAY, APRIL. 18, 2015<br /><span class="ev-title"><b>Children’s Stage</b></span><br /><span class="ev-signings">Signing Area 1</span></p></span>
<span class="info-body"><b>Anna Dewdney, </b>Author of<em> NELLY GNU AND DADDY TOO</em></span>
<span class="info-btn"><p class="selctor" rel="0"><span class="addSchd"><a href="#"><b>+ MY SCHEDULE</b></a></span>
<span class="mapit" ><a href="#"><b>map</b></a></span>
<span class="premove hidden" rel="0"><a href="#">Remove</a></span></p></span></td>
</tr>
</table>
</div>
<div class="11am target-stage stage-only saturday eventer" id="row1" rel="1">
<table border="0" cellspacing="0" cellpadding="0" style="border:none;">
<tr>
<td valign="top" align="left" class="ev-time" style="border:none;">11:00 a.m. </td>
<td valign="top" class="ev-desc">
<span class="info"><p class="ev-date">SATURDAY, APRIL. 18, 2015<br /><span class="ev-title"><b>Children’s Stage</b></span></p></span>
<span class="info-body"><b>Yuyi Morales, </b>Author of<em> NIÑO WRESTLES THE WORLD</em></span>
<span class="info-btn"><p class="selctor" rel="1"> <span class="addSchd"><a href="#"><b>+ MY SCHEDULE</b></a></span>
<span class="mapit" > <a href="#"><b>map</b></a></span>
<span class="premove hidden" rel="1"><a href="#">Remove</a></span></p></span></td>
</tr>
</table>
</div>
<div class="11am target-stage stage-only saturday eventer" id="row2" rel="2">
<table border="0" cellspacing="0" cellpadding="0" style="border:none;">
<tr>
<td valign="top" align="left" class="ev-time" style="border:none;">11:30 a.m. </td>
<td valign="top" class="ev-desc">
<span class="info"><p class="ev-date">SATURDAY, APRIL. 18, 2015<br /><span class="ev-title"><b>Children’s Stage</b></span><br /><span class="ev-signings">Signing Area 4</span></p></span>
<span class="info-body"><em>Scooby-Doo and the Carnival Creep,</em> presented by <b>Warner Bros. Consumer Products</b></span>
<span class="info-btn"><p class="selctor" rel="2"> <span class="addSchd"><a href="#"><b>+ MY SCHEDULE</b></a></span>
<span class="mapit"><a href="#"><b>map</b></a></span>
<span class="premove hidden" rel="2"><a href="#">Remove</a></span></p></span></td>
</tr>
</table>
</div></div>
<script>
$(document).ready(function(){
var storaged = Object.keys(localStorage);
var storageLength = storaged.length;
for (var i=0; i<storageLength; i++)
{
var el = $(localStorage[storaged[i]]);
$("#result").append(el);
}
$("#buttn2").click(function(){
localStorage.clear();
$("#result").html('');
console.log("Storage is cleared");
});
$(".premove").click(function (event) {
event.preventDefault();
var a=$(this).attr("rel");
console.log(a);
var eventsArray = document.getElementsByClassName("eventer");
var eventSelctd=(eventsArray[a]).outerHTML;
localStorage.removeItem("schedule " + a, eventSelctd);
eventsArray[a].outerHTML="";
});
});
</script>
您将 rel=(number)
添加到列表中的每个项目,并使用该数字在 document.getElementsByClassName("eventer")
定义的数组中获取其引用 - 每次删除一个项目时,数组都会变短,因为删除的项目现在消失了,你每次点击删除按钮都会重新定义它。发生的情况是您最终开始寻找第 4 项,但它不存在,因为列表中只存在两项。
另一种方法是查找最靠近您的按钮的元素并将其删除。
var eventSelected = $(this).closest('.eventer');
localStorage.removeItem("schedule " + a, eventSelected[0]);
eventSelected.remove();