mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-11-18 15:54:50 +00:00
29 lines
1.1 KiB
Plaintext
29 lines
1.1 KiB
Plaintext
created: 20221009124003601
|
|
modified: 20230419103154328
|
|
tags: Concepts Reference
|
|
title: Functions
|
|
type: text/vnd.tiddlywiki
|
|
|
|
!! Introduction
|
|
|
|
<<.from-version "5.3.0">> A <<.def function>> is a named snippet of text containing a [[Filter Expression]]. Functions can have named parameters which are available within the function as variables.
|
|
|
|
Functions are usually defined with the [[Pragma: \function]]:
|
|
|
|
```
|
|
\function my-function(parameter:"2")
|
|
[<parameter>multiply[1.5]]
|
|
\end
|
|
```
|
|
|
|
Functions can be invoked in several ways:
|
|
|
|
* Directly transclude functions with the syntax `<<myfn param:"value">>`
|
|
* Assign functions to widget attributes with the syntax `<div class=<<myfn param:"value">>>`
|
|
* Invoke functions via the [[function Operator]] with the syntax `[function[myfn],[value],...]`
|
|
* Directly invoke functions whose names contain a period as custom filter operators with the syntax `[my.fn[value]]` or `[.myfn[value]]`
|
|
|
|
!! How Functions Work
|
|
|
|
Functions are implemented as a special kind of [[variable|Variables]]. The only thing that distinguishes them from ordinary variables is the way that the parameters are handled.
|