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Welcome to FuncScript

FuncScript is what you get if propeties where allowe to be expressions in JSON notations, eg. {x:1+2;} will be allowed. Such extension will not take JSON all they to JavaScript as sequential excution and stateful operations will be allowed.

As such FuncScript is a supper set of JSON, in most way overlap with JavaScript but with some special twists that will make it not a proper subsect of JavaScript.

So, one can think of FuncScript as "JSON with superpowers." Every valid JSON document already parses as valid FuncScript:

{ a: 3; b: 4 }

From there you can upgrade individual values into expressions while keeping the same braces and punctuation:

{ a: 3; b: 5 + 6 }

Evaluation preserves the JSON shape but resolves expressions to concrete data:

{ a: 3; b: 11 }

Bindings behave like document fields and automatically become in-scope symbols, which makes reuse feel natural for anyone fluent in JSON-shaped configuration:

{ principal: 2000; rate: 0.07; growth: principal * (1 + rate) }

That snippet resolves to an object:

{ principal: 2000; rate: 0.07; growth: 2140 }

You are still shaping JSON, but now it reacts to the inputs around it.

Execution Model

Scripts always collapse to a single JSON-compatible value—numbers, strings, booleans, arrays, and object-like records. FuncScript keeps execution pure: there is no mutation or hidden state. The host application injects input data, FuncScript composes transformations, and the result can flow straight back into JSON pipelines, APIs, or templating systems.

Where to Next

Hosted Demos