It is a data templating language for app and tool developers. It is a powerful DSL for elegant description of JSON data.
Jsonnet is a tool in the Templating Languages & Extensions category of a tech stack.
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What are some alternatives to Jsonnet?
TypeScript is a language for application-scale JavaScript development. It's a typed superset of JavaScript that compiles to plain JavaScript.
Handlebars.js is an extension to the Mustache templating language created by Chris Wanstrath. Handlebars.js and Mustache are both logicless templating languages that keep the view and the code separated like we all know they should be.
Facilitating the separation of presentation (HTML/CSS) from application logic. This implies that PHP code is application logic, and is separated from the presentation
Mustache is a logic-less template syntax. It can be used for HTML, config files, source code - anything. It works by expanding tags in a template using values provided in a hash or object. We call it "logic-less" because there are no if statements, else clauses, or for loops. Instead there are only tags. Some tags are replaced with a value, some nothing, and others a series of values.
IntelliJ IDEA, Golang, C++, Atom, Visual Studio Code and 4 more are some of the popular tools that integrate with Jsonnet. Here's a list of all 9 tools that integrate with Jsonnet.