Features

Syntax highlighting (TextMate grammar)
Auto-completion for all 60+ built-in functions ($map, $filter, $reduce, …), keywords, and user-defined bindings
Hover documentation with signatures and return types
Signature help while typing function arguments
Go to Definition for user-defined variables
Find All References / Go to References for user-defined variables
Document formatting (automatic indentation and code cleanup)
Live parse-error diagnostics via the official jsonata engine
Interactive Expression Testing - Test JSONata expressions against JSON input with live output
Snippets for function, :=, blocks, if, ~> $map, ~> $filter, ~> $reduce

Usage

Open any file with a .jsonata extension.

Testing JSONata Expressions

Test your JSONata expressions against sample JSON data:

Open a .jsonata file
Click the Play button (▶) in the top-right corner of the editor
Paste your JSON data in the Input JSON text area
View the output or any errors in the Output section

The test panel automatically saves your input JSON and updates when you switch between different .jsonata files.

Go to Definition: Right-click on a variable usage and select "Go to Definition" (or press F12) to jump to where it's defined
Find All References: Right-click on a variable definition or usage and select "Find All References" (or press Shift+F12) to see all places where it's used
Peek References: Right-click and select "Peek References" to see references inline without leaving your current location

Example:

$myVariable := "value";  // Definition (line 1)

{
    "field": $myVariable  // Usage (line 4) - F12 here jumps to line 1
}
// Shift+F12 on line 1 shows both line 1 and line 4