小提琴的基本解释:当有人开始输入一个单元格,然后标记离开或解开时,它会在其上方创建一个新行,清空底行,并将焦点移动到" next"该新行中的input元素。它不完整,但足够孤立以显示问题行为。
所以我有一个问题,理解为什么当我通过parentElement调用上升到previousSibling.previousSibling
元素后尝试通过<tr>
向上两行时。它命中文本节点,因此我无法引用子<td>
元素。我错过了什么?
previousElementSibling
。
CODE:
<table border="1" cellspacing="1" id="lab-request-data_entry-table">
<thead class="ui-widget-report-header">
<tr>
<th>#</th>
<th>
<button class="ui-widget ui-widget-header">Delete</button>
</th>
<th>Location</th>
<th>Barcode</th>
<th>SumNukm</th>
<th>Status</th>
</tr>
</thead>
<tbody>
<tr>
<td>1</td>
<td>
<button class="ui-widget ui-widget-header" onclick="delete_record(this);">Delete</button>
</td>
<td>
<input type="hidden" value="v" />
<input type="text" value="v" />
</td>
<td>
<input type="hidden" value="222" />
<input type="text" value="222" />
</td>
<td>
<input type="hidden" value="22" />
<input type="text" value="22" />
</td>
<td>VALID</td>
</tr>
<tr>
<td></td>
<td></td>
<td>
<input type="text" onBlur="add_new_rec(this);" />
</td>
<td>
<input type="text" onBlur="add_new_rec(this);" />
</td>
<td>
<input type="text" onBlur="add_new_rec(this);" />
</td>
<td>New Record</td>
</tr>
</tbody>
</table>
JS:
add_new_rec = function (obj) {
var trait_arr = [1, 2, 3];
var $tbody = $("#lab-request-data_entry-table tbody");
var $erow = $(obj).parent().parent(); //Entry row.
var indexCol = $erow.find('td').index($(obj).parent()); //It's index.
var colCount = $(obj).parent().parent().find('td').length - 3; //Data entry columns to be inserted. Subtract 3 for the number, delete, and status
var rowLen = $tbody.find("tr").length;
var row_above = rowLen > 1 ? true : false;
if ($.trim(obj.value) == '') {
return;
}
var rowInfo = '';
rowInfo = '<button type="button" class="ui-widget ui-widget-header" onclick="delete_record(this); return false;" >Delete</button>';
$erow.before('<tr></tr>');
$erow.prev().append('<td><label>' + (rowLen) + '</label></td><td>' + rowInfo + '</td>');
//Now iterate through the columns, adding in a previous value if it's not the obj's location
for (var i = 0; i < colCount; i++) {
if (i == indexCol - 2) { //Case of it being the row we entered.
rowInfo = '<td><input type="hidden" value="' + obj.value + '"/><input type="text" value="' + obj.value + '"/></td>';
} else if (row_above == true) { //If so, pull down the answer into rowinfo
var numb = i + 2;
var prevCell = obj.parentElement.parentElement.previousSibling.previousSibling.children[numb].children[0].value; //Due to row added due to row number added already, we have to go another row up.
rowInfo = '<td><input type="hidden" value="' + prevCell + '"/><input type="text" value="' + prevCell + '"/></td>';
} else { //Create a blank row element.
rowInfo = '<td><input type="hidden" value=""/><input type="text" value=""/></td>';
}
$erow.prev().append(rowInfo);
}
//After done, add a status column with "New Record
//Call an update function and focus on the "next" row in the new row
obj.value = '';
};
答案 0 :(得分:3)
previousSibling
是之前的兄弟节点,它可能不是一个元素。这是jQuery存在的原因之一:DOM API真的很痛苦。 (现在不太常见了,在现代浏览器中我们有previousElementSibling
之类的东西。但是我们在创建jQuery时没有回来。)
添加新行后,您可以使用
$(obj).closest("tr").prev().prev()
...获取新行之前的行。在循环复制单元格值之前,我可能会这样做一次,而不是在循环中重复。