mirror of
https://github.com/Jermolene/TiddlyWiki5
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36 lines
1.7 KiB
Plaintext
36 lines
1.7 KiB
Plaintext
created: 20180323092308399
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modified: 20190307183936035
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tags: Features
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title: StartupActions
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type: text/vnd.tiddlywiki
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TiddlyWiki executes any ActionWidgets found in tiddlers with the following system tags during startup:
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* <<tag "$:/tags/StartupAction">> (executed on all platforms)
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* <<tag "$:/tags/StartupAction/Browser">> (only executed when running in the browser)
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* <<tag "$:/tags/StartupAction/Node">> (only executed when running under Node.js)
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Startup actions are useful for customising TiddlyWiki according to environmental factors such as the screen size. For example, the following action widgets when placed in a tiddler tagged `$:/tags/StartupAction/Browser` will cause the sidebar to be hidden by default when the screen width is less than 1000 pixels:
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```
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<$reveal type="lt" state="$:/info/browser/screen/width" text="3000">
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<$action-setfield $tiddler="$:/state/sidebar" $value="no"/>
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</$reveal>
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<$reveal type="gteq" state="$:/info/browser/screen/width" text="3000">
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<$action-setfield $tiddler="$:/state/sidebar" $value="yes"/>
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</$reveal>
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```
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<<.from-version "5.1.20">> This example switches to the language plugin matching the language reported by the browser:
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```
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<$action-setfield $tiddler="$:/language" text={{{ [[$:/languages/en-GB]] [plugin-type[language]sort[description]removeprefix[$:/languages/]] +[prefix{$:/info/browser/language}] ~[[en-GB]] +[addprefix[$:/languages/]] }}}/>
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```
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Note that global macros are not available within startup action tiddlers by default. If you need to access them then you'll need to explicitly include them with an ''import'' [[pragma|Pragma]] at the top of the tiddler:
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```
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\import [[$:/core/ui/PageMacros]] [all[shadows+tiddlers]tag[$:/tags/Macro]!has[draft.of]]
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```
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