@insomnia-dev/convert-svg-core

The core Node.js package for converting SVG into other formats using headless Chromium that contains the shared logic for all converters. This package is not intended to be used directly to convert SVGs and, instead, provides core support for SVG conversion.

• Install
• Implementation
• Testing
• Bugs
• Contributors
• License

Install

If you are looking to install an out-of-the-box SVG converter, check out our converter packages below:

https://github.com/neocotic/convert-svg

Alternatively, if you know what you're doing, you can install using npm:

$ npm install --save convert-svg-core

You'll need to have at least Node.js 8 or newer.

If you're looking to create a converter for a new format, we'd urge you to consider contributing to this framework so that it can be easily integrated and maintained. Read the Contributors section for information on how you can contribute.

Implementation

In order to create a new SVG converter that uses convert-svg-core, you'll need to create a new sub-directory for your package under the packages directory. Try to follow the convert-svg-to-<FORMAT> naming convention for the converter package name.

Take a look at the other packages in this directory to setup the new package directory. They are all very similar, by design, as the you should just need to provide the minimal amount of information required to support your intended output format.

The most important thing that's needed is a implementation of convert-svg-core/src/Provider. This is an abstract class and contains many methods that must be implemented. Read the JSDoc for these methods to understand what's needed. If your intended output format requires additional configuration, make the necessary changes to convert-svg-core, while ensuring that reuse and other converters are kept at the front of your mind.

With an implementation of Provider for your intended output format, you can now expose an API and CLI for it.

API

Create a file for your package's main module (commonly src/index.js) to contain something like the following:

const { API } = require("convert-svg-core");

const MyFormatProvider = require("./MyFormatProvider");

module.exports = new API(new MyFormatProvider());

Configure this in your package.json file and you're API is ready!

CLI

Create a file for your CLI (commonly bin/<PACKAGE-NAME>) to contain something like the following:

#!/usr/bin/env node

const { CLI } = require("convert-svg-core");

const MyFormatProvider = require("../src/MyFormatProvider");

(async () => {
  const cli = new CLI(new MyFormatProvider());

  try {
    await cli.parse(process.argv);
  } catch (e) {
    cli.error(`<PACKAGE-NAME> failed: ${e.stack}`);

    process.exit(1);
  }
})();

Make sure that your file is executable. For example;

$ chmod a+x bin/<PACKAGE-NAME>

Configure this in your package.json file and you're CLI is ready!

Testing

Testing your SVG converter actually works is just as important as implementing it. Since convert-svg-core contains a lot of the conversion logic, a convert-svg-test-helper package is available to make testing implementations even easier. Again, take a look at the tests for existing SVG converters under the packages directory for examples.

Bugs

If you have any problems with this package or would like to see changes currently in development you can do so here.

Contributors

If you want to contribute, you're a legend! Information on how you can do so can be found in CONTRIBUTING.md. We want your suggestions and pull requests!

A list of all contributors can be found in AUTHORS.md.

License

Copyright © 2018 Alasdair Mercer

See LICENSE.md for more information on our MIT license.