Template:Spoiler

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Documentation
This "hides" spoiler material by making it white like the page background, so that one must highlight it to read it.

Usage:

The  (which can also be given as  ) is optional, but safest to include, since the template will break if the content include a   character anywhere in it.

You can change "Spoiler" wording (which gives a note when you over over it) to something else:

If a different color is needed, because the background color is different (e.g. inside a colorful sidebar), you can specify a hex color (without the  prefix) or a named CSS color: