See JSON in TiddlyWiki for an overview of using JSON in TiddlyWiki.

Filter Operators for Accessing JSON Data

The following filter operators allow values to be read from JSON data:

• jsonget to retrieve the values of a property in JSON data
• jsontype to retrieve the type of a JSON value
• jsonindexes to retrieve the names of the fields of a JSON object, or the indexes of a JSON array
• jsonextract to retrieve a JSON value as a string of JSON

Text References for Accessing JSON Data

Text references are a simple shortcut syntax to look up the value of a named property. For example, if a DictionaryTiddler called MonthDays contains:

oct:31
nov:30
dec:31

... then {{MonthDays##nov}} will resolve to the value 30.

The same is true if MonthDays is a JSONTiddler with the following content:

{"oct":31,"nov":30,"dec":31}