caption: genesis
created: 20220502144738010
modified: 20220502144738010
tags: Widgets
title: GenesisWidget
type: text/vnd.tiddlywiki

! Introduction

<<.from-version "5.3.0">> The genesis widget allows the dynamic construction of another widget, where the name and attributes of the new widget can be dynamically determined, without needing to be known in advance.

! Content and Attributes

The content of the `<$genesis>` widget is used as the content of the dynamically created widget.

|!Attribute |!Description |
|$type |The type of widget to create (note that the first `$` must not be included, so the `<$text>` widget would be created by passing `text`) |
|$tag |The HTML tag to be used for "element" widgets |
|$names |An optional filter evaluating to the names of a list of attributes to be applied to the widget |
|$values |An optional filter evaluating to the values corresponding to the list of names specified in `$names` |
|//{other attributes starting with $}// |Other attributes starting with a single dollar sign are reserved for future use |
|//{attributes starting with $$}// |Attributes starting with two dollar signs are appplied as attributes to the output widget, but with the attribute name changed to use a single dollar sign |
|//{attributes not starting with $}// |Any other attributes that do not start with a dollar are applied as attributes to the output widget |

Note that attributes explicitly specified take precedence over attributes with the same name specified in the `$names` filter.

! Examples

<$macrocall $name='wikitext-example-without-html' 
src='<$genesis $tag="div" class="tc-thing" label="Squeak">Mouse</$genesis>'/>