Templates that read like Pug, for any tree, written in KDL.

kdlet is a small template language. A file says what a tree looks like once data is put into it: where values go, what repeats, and what appears only under a named condition. It has no elements of its own; a renderer brings its words.

This package is the language. It reads a file and evaluates it into a plain tree. To get HTML out, add kdlet-html.

npm install kdlet kdlet-html

ul.posts {
    each post in=(input)posts key=slug { li (post)title }
    else { li "No posts yet." }
}

import { evaluate, read } from 'kdlet';
import { render, vocabulary } from 'kdlet-html';

const document = read(text); // document.problems: every problem, with line and column
const { tree, problems } = evaluate(document, { vocabulary, inputs: { posts } });
const html = render(tree);

What it exports

| Export | What it does | |---|---| | read(text, options?) | KDL text to a document, with every problem found and its line and column | | evaluate(document, options) | A document, inputs, the host's guards and definitions, and a vocabulary, to a plain tree in which every node has an identity | | defineVocabulary(vocabulary) | Registers a renderer's words, and refuses a collision with the language's |

Node 20 or later, ESM only.

Read next

• The manual: the syntax and every rule, with worked examples.
• The repository: the vision, the principles and the source.

License

MIT.