Retrieving Inherited CSS Styles with DOM

If you need to get a CSS style from an element in a document, you cannot just test the style of the element directly. That is: Element.style.nameOfStyle won’t work. Take this example:

<p style="white-space:pre">
  Hello world - <b> A  B  C  D </b>
</p>

The immediate white space style of the bold element in the DOM will be normal (default for bold element). However the style is actually pre, since it inherits it from the paragraph ancestor element.
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