Deno support

[Noah from ProvocaTeach]

Hello, I am opening an issue for supporting Deno via ES module importing out-of-the-box, per discussion in issue #138 at the suggestion of @jacoscaz.

Deno is a runtime for JavaScript created by Ryan Dahl (who also built Node). Benefits of Deno include:

• Direct support for TypeScript
• Security by default
• Browser-like behavior whenever possible

Members of the Quadstore team may have a better idea than I do of how far-off this is. I don’t have a great sense of how much the most popular RDF/JS projects depend on Node. However, Skypack or a similar Deno-friendly CDN may be a good way to provide stopgap support.

Some helpful Deno links:

• Deno homepage
• Deno v1.13.2 manual
  • Section on module system
  • Section on using npm / Node.js code
  • Section on Deno-friendly CDNs, e.g. Skypack
• Skypack docs
  • Package checks: Best practices for Node package authors wishing to support ES modules.
  • Deno support: How Skypack can be used for Deno specifically, and when this is/isn’t possible.
• 10 Things I Regret About Node.js - Ryan Dahl - JSConf EU: Helpful for understanding the philosophy and design goals of Deno.
• Syntax.fm episode on Deno: A somewhat-silly but comprehensive podcast introduction to Deno that assumes no prior knowledge.

[Jacopo Scazzosi]

Thanks to the recent addition of separate ESM vs. CJS builds, partial support for Deno is now available through Skypack in quadstore@11.0.0-beta.5:

import { DataFactory } from 'https://cdn.skypack.dev/rdf-data-factory@1.1.1';
import { Quadstore } from 'https://cdn.skypack.dev/quadstore@11.0.0-beta.4';
import { MemoryLevel } from 'https://cdn.skypack.dev/memory-level@1.0.0';

const backend = new MemoryLevel();
const dataFactory = new DataFactory();
const store = new Quadstore({ backend, dataFactory });

await store.open();
await store.put(dataFactory.quad(
  dataFactory.namedNode('ex://s'),
  dataFactory.namedNode('ex://p'),
  dataFactory.namedNode('ex://o'),
));
const { items } = await store.get({});
console.log(items);
await store.close();

Further work is needed to add support for Deno in quadstore-comunica, thus enabling SPARQL queries in Deno, and likely depends on fixing this upstream issue: RubenVerborgh/SPARQL.js#139 .

[Jacopo Scazzosi]

Found a temporary workaround by using import maps to replace Skypack's version of sparqljs@3.5.2 with https://gist.github.com/jacoscaz/022c513ca77b0061c5bfee0356ba3b8d , which contains a small fix for the unchecked usage of require.

[Jacopo Scazzosi]

Closing - will be a part of the upcoming 11.0.0 release!