title: Exact difference between the wordpress address url and the site address url
body: <p>I am currently fixing a wordpress theme that contains absolute URLs. Example:</p>
  
  <pre><code>$.preloadImages('/wp-content/themes/themeName/img/button.png');
  </code></pre>
  
  <p>Now I want to prefix the url with something like <code>WP_HOME</code> or <code>WP_SITEURL</code> but I don't know which one to choose. What is the exact difference? In other words, what is the scenario in which the two might differ?</p>
  
  <p>I guess they correspond to the "wordpress address" and the "site address" in the settings. However, the explanation there does not help me.</p>