Template:Hatnote/doc

The hatnotes used for adding links between articles where more context is important. Broadly speaking, a hatnote should answer a readers' question: Am I on the right page?

Usage
&#123;{hatnote|text}}
 * Basic usage:

&#123;{hatnote|text|extraclasses=extra classes|selfref=yes|category=no}}
 * All parameters:

Parameters
This template accepts the following parameters:
 * - the hatnote text (required)
 * - any extra CSS classes to be added.
 * - If set to "yes", "y", "true" or "1", adds the CSS class "selfref". This is used to denote self-references.
 * - If set to "no", "n", "false", or "0", suppresses the error tracking category (Category:Hatnote templates with errors). This has an effect only if the leftmost parameter (the hatnote text) is omitted.

Errors
If no hatnote text is supplied, the template will output the following message:

If you see this error message, it is for one of four reasons:
 * 1) No parameters were specified (the template code was  ). Please use   instead.
 * 2) Some parameters were specified, but the hatnote text wasn't included. For example, the template text   will produce this error. Please use (for example)   instead.
 * 3) The hatnote text was specified, but that text contains an equals sign ("="). The equals sign has a special meaning in template code, and because of this it cannot be used in template parameters that do not specify a parameter name. For example, the template code   will produce this error. To work around this, you can specify the parameter name explicitly by using   before the hatnote text, like this:.
 * 4) You tried to access Module:Hatnote directly by using  . Use of #invoke in this way has been disabled for performance reasons. Please use   instead.

Pages that contain this error message are tracked in Category:Hatnote templates with errors.

Technical details
This template uses the Lua templating language, and more information can be found on the Global Lua Module page. For a traditional wikitext version of this template, see Hatnote on Templates Wiki.

The HTML code produced by this template looks like this: