@hanazuki/node-jsonnet is a libjsonnet binding for Node.js (native addon), which supports all the basic Jsonnet functionality including import and native callbacks (std.native). It also comes with TypeScript type definitions.
import { Jsonnet } from "@hanazuki/node-jsonnet";
const jsonnet = new Jsonnet();
// Evaluates a simple Jsonnet program into a JSON value
jsonnet.evaluateSnippet(`{a: 1 + 2, b: self.a * 3}`)
.then(json => console.log(JSON.parse(json))); // => { a: 3, b: 9 }
// Jsonnet programs can use JavaScript values through external variables (std.extVar)
// and native callbacks (std.native).
jsonnet.extCode("x", "4")
.nativeCallback("add", (a, b) => Number(a) + Number(b), "a", "b")
.evaluateSnippet(`std.extVar("x") * std.native("add")(1, 2)`)
.then(json => console.log(JSON.parse(json))); // => 12The library is documented in the TypeScript type definitions at types/index.d.ts, and HTML documentation is also available online.
@hanazuki/node-jsonnet is licensed under the MIT License (See LICENSE file for the terms). libjsonnet, whose source code is bundled in the distributed NPM packages of @hanazuki/node-jsonnet, is licensed under the Apache License, Version 2.0 (See third_party/jsonnet/LICENSE in this package or LICENSE file in the original repository). libjsonnet also bundles third-party software that is subject to other OSS licenses.