System tiddlers in the namespace $:/info/ are used to expose information about the system (including the current browser) so that WikiText applications can adapt themselves to available features.
| Title | Description |
|---|---|
| $:/info/browser | Running in the browser? ("yes" or "no") |
| $:/info/browser/screen/width | Screen width in pixels |
| $:/info/browser/screen/height | Screen height in pixels |
| $:/info/node | Running under Node.js? ("yes" or "no") |
| $:/info/url/full | New in: 5.1.14 Full URL of wiki (eg, ) |
| $:/info/url/host | New in: 5.1.14 Host portion of URL of wiki (eg, ) |
| $:/info/url/hostname | New in: 5.1.14 Hostname portion of URL of wiki (eg, ) |
| $:/info/url/origin | New in: 5.1.14 Origin portion of URL of wiki (eg, ) |
| $:/info/url/pathname | New in: 5.1.14 Pathname portion of URL of wiki (eg, ) |
| $:/info/url/port | New in: 5.1.14 Port portion of URL of wiki (eg, ) |
| $:/info/url/protocol | New in: 5.1.14 Protocol portion of URL of wiki (eg, ) |
| $:/info/url/search | New in: 5.1.14 Search portion of URL of wiki (eg, ) |