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From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups: comp.lang.javascript
Subject: Re: Why newly inserted area is not editable?
Date: Fri, 09 Dec 2016 00:53:31 +0100
Organization: PointedEars Software (PES)
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JJ wrote:

> previousSibling may not be an element node, depending on where you've
> inserted the dynamically created TR element. You don't ignore that.

The “previousElementSibling” property introduced with DOM4 can provide an 
easier workaround than an XPath expression (supported by an implementation 
of DOM Level 2 XPath) or sibling node iteration.  Likewise, before one 
writes an XPath expression, or attempts to iterate over child nodes, or 
resorts to a library, one should check if the “firstElementChild”, 
“lastElementChild”, or “children” properties are implemented that are 
specified there.

<https://www.w3.org/TR/dom/#nondocumenttypechildnode>
<https://www.w3.org/TR/dom/#parentnode>

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