When the JavaScript global environment is a window or an iframe, it is called a document environment. A global environment is an environment that doesn't have an outer environment.
<p><span class="seoSummary">When the JavaScript global environment is a window or an iframe, it is called a <em>document environment</em>. A global environment is an environment that doesn't have an outer environment.</span></p> <h2 id="Learn_More">Learn More</h2> <h3 id="Technical_reference">Technical reference</h3> <ul> <li><a href="https://html.spec.whatwg.org/multipage/webappapis.html#document-environment">document environment</a> in the HTML specification</li> </ul>