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Awaitable Import and Export APIs in dmn-js

Published by Max Trumpf on Tuesday, 29 June 2021.

dmn-js11.0.1

One of our top priorities is to ensure the best possible developer experience consistently across our libraries. Following this priority, we are happy to announce the latest release of our DMN modeling toolkit. This release ships with Promise support for our async import and export APIs. Using this release, users can await API results and therefore benefit from async features available in modern, ES6-style JavaScript codebases.

This release brings Promise support to our async toolkit APIs, allowing you to await the import or export results in a state-of-the-art manner:

const modeler = new DmnJS();

try {
  await modeler.importXML(dmnDiagramXML);
} catch (err) {
  // handle import error
}

Callbacks style invocations are still supported but will be dropped in a future major release. We advise you to migrate to Promise-based API usage. Refer to the moving to Promises documentation to learn about how to migrate using detailed examples. If you are still targeting Internet Explorer or Opera Mini, ensure you polyfill the global Promise object.

Promisified Import and Export APIs

You can now await these dmn-js APIs:

Here's a small example of how to open a DMN diagram in the new way.

const modeler = new DmnJS();

try {
  const {
    warnings
  } = await modeler.importXML(dmnDiagramXML);

  console.log('Imported DMN 1.3 diagram', warnings);
} catch (err) {

  const {
    warnings
  } = err;

  console.log('Failed to import DMN 1.3 diagram', err, warnings);
}

Here is a small example of how to export a diagrams SVG in the new way.

try {
  const {
    svg
  } = await modeler.saveSVG();

  console.log('Exported DMN 1.3 diagram in SVG format', svg);
} catch (err) {

  console.error(err);
}

For more examples, check by our our example repository for dmn-js. It is already updated to feature the promisified APIs in action!

Please approach us via our forums to share your feedback regarding these changes.

Wrapping Up

Read through the full changelog to learn about all issues that we addressed with dmn-js@11.0.

Did we miss anything? Did you spot a bug, or would you like to suggest an improvement? Reach out to us via our forums, tweet us @bpmn_io or file an issue you found in the dmn-js issue tracker.

Get the latest DMN modeling toolkit pre-packaged or as source code via npm or unpkg.

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