[解決済み] cssでheightが設定されていないdivのheightを取得する。

$(function() {
  var $heightTest = $('#heightTest');
  $heightTest.html('Div style set as "height: 180px; padding: 10px; margin: 10px; border: 2px solid blue;"')
    .append('<p>Height (.height() returns) : ' + $heightTest.height() + ' [Just Height]</p>')
    .append('<p>Inner Height (.innerHeight() returns): ' + $heightTest.innerHeight() + ' [Height + Padding (without border)]</p>')
    .append('<p>Outer Height (.outerHeight() returns): ' + $heightTest.outerHeight() + ' [Height + Padding + Border]</p>')
    .append('<p>Outer Height (.outerHeight(true) returns): ' + $heightTest.outerHeight(true) + ' [Height + Padding + Border + Margin]</p>')
});

div { font-size: 0.9em; }

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id="heightTest" style="height: 150px; padding: 10px; margin: 10px; border: 2px solid blue; overflow: hidden; ">
</div>