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Macros

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Macros provide commands to perform a variety of advanced functions in the place they are called at.

A macro is usually called by adding something like the following to a specific tiddler: 

<<macroName [parameters]>>

In contrast to plugins, a macro's code is only executed when the respective tiddler containing the macro call is rendered.

Contents

[edit] Parameters

Generally, there are four ways to use macro parameters:

  • no enclosing: <<foo bar baz>>
  • single quotes: <<foo 'bar' 'baz'>>
  • double quotes: <<foo "bar" "baz">>
  • double brackets: <<foo [[bar]] [[baz]]>>

Empty parameters (e.g. to adopt default value if the parameter is optional) are inserted by enclosing an empty string (, "" or [[]]).

There's also fifth way, using curly brackets ({{...}}) - those contents are evaluated, so they're only used if the parameter value has to be calculated in some way.

[edit] Named Parameters

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<<macro label:value>>

[edit] Evaluated Parameters

Parameters enclosed in {{ ... }} are processed as JavaScript code.

[edit] See Also

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