Compare and contrast the highlighted rectangles across different browsers.

The highlighted rectangles are drawn based on the value returned from `range.getClientRects()` (see page source for details).

Chrome, Safari and Firefox are consistent in that the line-height does not affect the rectangle height. Edge is the odd one out in that the line-height does affect the rectangle height.

For questions or comments please contact mark.buer@booktrack.com

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Here is some text with standard line-height.
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And here is some text with smaller line-height.
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And yet more text, this time with larger line-height.
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For this massive line-height, we only highlight the phrase "hello world", for variety.
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