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51 lines
1.8 KiB
Plaintext
51 lines
1.8 KiB
Plaintext
caption: action-log
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created: 20201114113318785
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modified: 20201120155202652
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tags: Widgets ActionWidgets [[Debugging Widgets]]
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title: ActionLogWidget
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type: text/vnd.tiddlywiki
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! Introduction
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<<.from-version "5.1.23">> The ''action-log'' widget is an [[action widget|ActionWidgets]] that can be used to output debugging information to the [[JavaScript console|Web Developer Tools]] supported by most browsers. This can be useful because otherwise it is difficult to observe what is going on within a sequence of actions.
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ActionWidgets are used within triggering widgets such as the ButtonWidget.
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<<.tip """ For debugging outside of actions see [[LogWidget]]""">>
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! Content and Attributes
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The ''action-log'' widget is invisible. Any content within it is ignored.
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When the actions are invoked, the names and values of all attributes are logged to the JavaScript console.
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In addition there are optional attributes that can be used:
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|!Optional Attribute |!Description |
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|$$filter|All variables matching this filter will also be logged. |
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|$$message |A message to display as the title of the information logged. Useful when several `action-log` widgets are used in sequence. |
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|$$all |Set to "yes" to log all variables in a collapsed table. Note that if there is nothing specified to log, all variables are always logged instead.|
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<<.tip """A handy tip if an action widget is not behaving as expected is to temporarily change it to an `<$action-log>` widget so that the attributes can be observed.""">>
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! Example
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Here is an example of logging two variables:
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```
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<$action-log myVar=<<myVar>> otherVar=<<otherVar>>/>
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```
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To log all variables:
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```
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<$action-log />
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```
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To log two variables as well as all core variables (which start with `tv-`):
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```
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<$action-log myVar=<<myVar>> other={{!!status}} $$filter="[prefix[tv-]]"/>
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```
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