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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - REGRESSION (r178097): HTMLSelectElement.add(option, undefined) prepends option to the list of options; should append to the end of the list of options"
href="https://bugs.webkit.org/show_bug.cgi?id=146566#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - REGRESSION (r178097): HTMLSelectElement.add(option, undefined) prepends option to the list of options; should append to the end of the list of options"
href="https://bugs.webkit.org/show_bug.cgi?id=146566">bug 146566</a>
from <span class="vcard"><a class="email" href="mailto:cdumez@apple.com" title="Chris Dumez <cdumez@apple.com>"> <span class="fn">Chris Dumez</span></a>
</span></b>
<pre>Relevant specs:
<a href="https://html.spec.whatwg.org/multipage/forms.html#dom-select-add">https://html.spec.whatwg.org/multipage/forms.html#dom-select-add</a>
which points to:
<a href="https://html.spec.whatwg.org/multipage/infrastructure.html#dom-htmloptionscollection-add">https://html.spec.whatwg.org/multipage/infrastructure.html#dom-htmloptionscollection-add</a>
which says in this case to call the DOM insertBefore() method on the parent node, with element as the first argument and null (in our case) as the second argument.
<a href="https://dom.spec.whatwg.org/#dom-node-insertbefore">https://dom.spec.whatwg.org/#dom-node-insertbefore</a>
->
<a href="https://dom.spec.whatwg.org/#concept-node-insert">https://dom.spec.whatwg.org/#concept-node-insert</a>
"
For each newNode in nodes, in tree order, run these substeps:
1. Insert newNode into parent before child or at the end of parent if child is null.
2. Run the insertion steps with newNode.
"
Ok, so even though it is hard to follow, the spec does say to insert "at the end of parent if child is null".</pre>
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