mirror of
https://github.com/Jermolene/TiddlyWiki5
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45 lines
2.1 KiB
Plaintext
45 lines
2.1 KiB
Plaintext
created: 20180323092308399
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modified: 20201025161723719
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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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* Executed during initial 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 "$:/tags/StartupAction/Node">> (only executed when running under Node.js)
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* Executed after startup rendering:
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** <<.from-version "5.1.23">> <<tag "$:/tags/StartupAction/PostRender">> (only executed when running in the browser)
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!! Initial Startup Actions
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The initial 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 initial startup action tiddlers by default. If you need to access them then you'll need to explicitly include them with an [[Pragma: \import]] at the top of the tiddler:
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```
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\import [subfilter{$:/core/config/GlobalImportFilter}]
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```
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!! Post-Render Startup Actions
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<<.from-version "5.1.23">> Post-render startup actions occur after the TiddlyWiki user interface has been rendered. This makes it possible to perform actions that depend on the rendered display (such as displaying modals).
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