<!-- 
 Verify default overflow rules for the outermost <svg> element in non-standalone documents.
 You should see a 400x400 green rectangle, not covering the whole screen size.

 Spec reference:
 When an outermost 'svg' element is embedded inline within a parent XML grammar which uses CSS layout [CSS2-LAYOUT]
 or XSL formatting [XSL], if the 'overflow' property has the value hidden or scroll, then the user agent will establish
 an initial clipping path equal to the bounds of the initial viewport; otherwise, the initial clipping path is set
 according to the clipping rules as defined in [CSS2-overflow].
-->
<html>
<body>
<svg xmlns="http://www.w3.org/2000/svg" style="overflow: auto" width="400" height="400">
    <rect width="4000" height="4000" fill="green"/>
</svg>
</body>
</html>