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- <!DOCTYPE html>
- <html reftest-zoom="0.2">
- <head>
- <!-- Default to invisible text -->
- <style type="text/css" media="screen, print">
- .hidden {
- color: white;
- }
- .visible {
- color: black;
- }
- </style>
- </head>
- <body>
- <!-- Nest successive radicals and test that the horizontal bar of one of them is drawn.
- Because the comparison is for inequality with about:blank, at most one can be visible -->
- <math>
- <mrow>
- <msqrt class="hidden">
- <mspace width="1em" height="1em" />
- <msqrt class="hidden">
- <mspace width="1em" height="1em" />
- <msqrt class="hidden">
- <mspace width="1em" height="1em" />
- <msqrt class="hidden">
- <mspace width="1em" height="1em" />
- <msqrt class="hidden">
- <mspace width="1em" height="1em" />
- <msqrt class="visible">
- <mspace width="1em" height="1em" />
- <msqrt class="hidden">
- <mspace width="20em" height="1em" />
- </msqrt>
- </msqrt>
- </msqrt>
- </msqrt>
- </msqrt>
- </msqrt>
- </msqrt>
- </mrow>
- </math>
- <!-- Block out all but the horizontal bar of the visible radical -->
- <div style="position: absolute; top: 5px; left: 0px;
- width: 20em; height: 10em; background: white;"></div>
- </body>
- </html>
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