jstransformer

What is jstransformer?

The jstransformer npm package provides a standardized interface for handling different kinds of transformations on strings, such as compiling template languages, processing markdown, or minifying code. It allows developers to use a consistent API across various transformers.

What are jstransformer's main functionalities?

Template Compilation

Compile templates from languages like Jade/Pug to HTML.

const jstransformer = require('jstransformer');
const jade = require('jstransformer-jade');

const input = 'h1 Jade - node template engine';
const result = jstransformer(jade).render(input).body;
console.log(result);

Markdown Processing

Convert markdown syntax to HTML.

const jstransformer = require('jstransformer');
const markdown = require('jstransformer-markdown');

const input = '# Markdown Example\n\nSome *emphasis* and **strong** text.';
const result = jstransformer(markdown).render(input).body;
console.log(result);

Code Minification

Minify JavaScript code using UglifyJS.

const jstransformer = require('jstransformer');
const uglify = require('jstransformer-uglify-js');

const input = 'function add(x, y) {\n  return x + y;\n}';
const result = jstransformer(uglify).render(input).body;
console.log(result);

Other packages similar to jstransformer

marked

Marked is a markdown parser and compiler. It's built for speed and is often used to convert markdown to HTML. Unlike jstransformer, which provides a unified interface for various transformations, marked focuses solely on markdown.

pug

Pug is a high-performance template engine heavily influenced by Haml and implemented with JavaScript for Node.js and browsers. It compiles to HTML and has a powerful syntax, which is different from jstransformer's approach of providing a common API for different template engines.

uglify-js

UglifyJS is a JavaScript parser, minifier, compressor, or beautifier toolkit. It provides its own API for minifying JavaScript code, whereas jstransformer offers a standardized way to use UglifyJS through its interface.

README

JSTransformer

Normalize the API of any jstransformer

Installation

npm install jstransformer

Usage

var transformer = require('jstransformer');
var marked = transformer(require('jstransformer-marked'));

var options = {};
var res = marked.render('Some **markdown**', options);
// => {body: 'Some <strong>markdown</strong>', dependencies: []}

This gives the same API regardless of the jstransformer passed in.

API

A transformer, once normalised using this module, will implement the following methods. Note that if the underlying transformer cannot be used to implement the functionality, it may ultimately just throw an error.

Returned object from .render*

{body: String, dependencies: Array.<String>}

• body represents the result as a string
• dependencies is an array of files that were read in as part of the render process (or an empty array if there were no dependencies)

.render

transformer.render(str, options, locals);
=> {body: String, dependencies: Array.<String>}

requires the underlying transform to implement .render or .compile

Transform a string and return an object.

.renderAsync

transformer.renderAsync(str[, options], locals, callback);

transformer.renderAsync(str[, options], locals);
=> Promise({body: String, dependencies: Array.<String>})

requires the underlying transform to implement .renderAsync or .render

Transform a string asynchronously. If a callback is provided, it is called as callback(err, data), otherwise a Promise is returned.

.renderFile

transformer.renderFile(filename, options, locals)
=> {body: String, dependencies: Array.<String>}

requires the underlying transform to implement .renderFile, .render, .compileFile, or .compile

Transform a file and return an object.

.renderFileAsync

transformer.renderFileAsync(filename[, options], locals, callback);

transformer.renderFileAsync(filename[, options], locals);
=> Promise({body: String, dependencies: Array.<String>})

requires the underlying transform to implement .renderFileAsync, .renderFile, .renderAsync, .render, .compileFileAsync, .compileFile, .compileAsync, or .compileFile

Transform a file asynchronously. If a callback is provided, it is called as callback(err, data), otherwise a Promise is returned.

.inputFormats

var formats = transformer.inputFormats;
=> ['md', 'markdown']

Returns an array of strings representing potential input formats for the transform. If not provided directly by the transform, results in an array containing the name of the transform.

.outputFormat

var md = require('jstransformer')(require('jstransformer-markdown'))
var outputFormat = md.outputFormat
=> 'html'

Returns a string representing the default output format the transform would be expected to return when calling .render().

License

MIT