What is Jsonnet?

Introduction to a domain specific configuration language that helps to define JSON data
30 October 2017   1598

What is Jsonnet?

Jsonnet is a domain specific configuration language that helps you define JSON data. Jsonnet lets you compute fragments of JSON within the structure, bringing the same benefit to structured data that templating languages bring to plain text. The example below illustrates a few features -- referring to another part of the structure, overriding object fields, and string operations.

Use Jsonnet to organize your JSON data, or to help your users organize the data they send to you. It is easy to integrate Jsonnet's library or commandline interpreter into existing systems that take JSON or YAML. Some example situations are application configuration (files in etc), build systems, package definitions, configuration management systems, and cloud deployment agents.

Code examples

// Jsonnet Example
    person1: {
        name: "Alice",
        welcome: "Hello " + self.name + "!",
    person2: self.person1 { name: "Bob" },

Goes to:

   "person1": {
      "name": "Alice",
      "welcome": "Hello Alice!"
   "person2": {
      "name": "Bob",
      "welcome": "Hello Bob!"


If you are interested, visit:

  • Website
  • GitHub
  • Docs

Visual Studio Code 1.30 Released

The solution has received new features, as well as improved support for JavaScript and TypeScript
14 December 2018   39

Microsoft has released the development environment Visual Studio Code 1.30. The tool has received new features, as well as improved support for JavaScript and TypeScript.

The search tool in the new version of the editor allows you to make multi-line queries. You can add a new line to the query by pressing Shift + Enter or simply by pasting text from the clipboard.

Custom headers and menu items in Linux are now activated by default. Since some menus may go beyond the boundaries of the screen, the developers added the ability to scroll.

Menu items designed to work with the settings have been moved to the title bar of the editor.

In the snippet, new comment variables are implemented, allowing to leave lines or blocks of notes based on the language of the code.

Also, the developers added the Go to Declaration and Peek Declaration commands to Visual Studio Code 1.30 in addition to the existing Go to Definition and Peek Definition. This is due to the fact that in some languages ​​the concepts of definition and declaration are fundamentally different.

In Visual Studio Code 1.30, you can work with TypeScript 3.2.2. Display of callbacks in JavaScript and TypeScript is improved. The new version of the editor displays which function they belong to.

The developers have improved the integration with the repository. In the new version of the program, you can change the tool that opens the file by clicking on the version control panel.

The Visual Studio Code 1.30 error detection and removal tool allows you to delete debug consoles for inactive sessions. Improved concept of variable substitution in launch.json configuration. The initial debug configuration itself has been simplified by hiding minor elements and adding a Quick Pick interface.

You can set the task to run automatically when you open the project folder. In addition, several new tasks have been added to the task management command section, for example, Tasks: Rerun Last Task, which allows you to restart the previous process.