为什么这个 javascript 不能正确分配 .cells[] ？
为什么这不起作用？
var row = document.getElementById(currentRow);
var otherRow = document.getElementById(targetRow);
row.cells[0] = otherRow.cells[0];
这适用于
row.cells[0].innerHTML = otherRow.cells[0].innerHTML;
但是，单元格附加了一些属性，我也想将其移动而无需手动重新创建它们。
解决方案（注：我的实际实现中正在做更多工作，但这只是框架）：
for (var i = 0; i < 4; i++) {
var copyTo = row.cells[i];
var copyFrom = otherRow.cells[i].cloneNode(true);
copyTo.parentNode.replaceChild(copyFrom, copyTo);
}
Why doesn't this work?
var row = document.getElementById(currentRow);
var otherRow = document.getElementById(targetRow);
row.cells[0] = otherRow.cells[0];
This works with
row.cells[0].innerHTML = otherRow.cells[0].innerHTML;
However, there are attributes attached to the cell which I also want to move over without having to manually recreate them.
Solution (Note: more is being done in my actual implementation, but this is the framework):
for (var i = 0; i < 4; i++) {
var copyTo = row.cells[i];
var copyFrom = otherRow.cells[i].cloneNode(true);
copyTo.parentNode.replaceChild(copyFrom, copyTo);
}
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评论（2）
您应该能够使用
cloneNode()来实际克隆节点及其属性。You should be able to use
cloneNode()to actually clone the node and its attributes.cells中的每个条目都引用一个 DOMElement。当您输入row.cells[0] = otherRow.cells[0]时，您是在说您希望row.cell[0]引用与row.cell[0]相同的 DOMElement代码>otherRow.cells[0]。我猜您希望
row.cells[0]具有与otherRow.cells[0];相同的文本或 HTML，在这种情况下，第二个代码片段将这样做，因为您实际上是在修改 DOMElement，而不仅仅是更改您引用的 DOMElement。Each entry in
cellsrefers to a DOMElement. When you typedrow.cells[0] = otherRow.cells[0], you are saying that you wantrow.cell[0]to reference the same DOMElement asotherRow.cells[0].I'm guessing you want
row.cells[0]to have the same text or HTML asotherRow.cells[0];in which case, the second code snippet will do just that, since you are actually modifying the DOMElement, and not just changing which DOMElement you are referencing.