Calculate em from pixels (snippet pipe)


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*This snippet was originally inspired by [sotetbarna](http://e-texteditor.com/forum/viewtopic.php?p=11786#11786)*

A snippet pipe that will calculate ems based on a given pixel value and base unit.

E.g. If you want a 10px font-size expressed in ems, you would need to perform the following calculation (note 16px is the default base font size in all browsers):

10px / 16px = 0.625em

This snippet allows you to specify the desired pixel size and the base font size and will return the calculated em value.

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