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TiddlyWiki5/editions/tw5.com/tiddlers/mechanisms/MediaQueryTrackerMechanism.tid

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title: MediaQueryTrackerMechanism
tags: Mechanisms
The media query tracker mechanism allows you to define [[custom CSS media queries|https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_media_queries/Using_media_queries]] to be bound to a specified [[info|InfoMechanism]] tiddler. The info tiddler will be dynamically update to reflect the current state of the media query.
Adding or modifying a tiddler tagged $:/tags/MediaQueryTracker will only take effect when the wiki is reloaded
The media queries are always applied against the main window. This is relevant for viewport related media queries such as `min-width` which will always respect the main window and ignore the sizes of any external windows.