title: What is the technical name of the items set within an html element's style attribute?
body: <p>E.g. what is the technical term for the parts of <code>width: 100px</code> within the following style attribute?</p>
  
  <pre><code>&lt;div style="width: 100px;"&gt; ... &lt;/div&gt;
  </code></pre>
  
  <p>Is 'width' here one of the style attribute's <strong>properties</strong>? And then what is the technical term for the '100px' bit here?</p>