Detect browsers in a Deno-compatible way

[yudai-nkt]

I'm trying to use Tesseract.js in Deno, but currently I can't because of an incorrect runtime detection:

import { createWorker } from 'https://cdn.skypack.dev/[email protected]?dts'

const worker = await createWorker()
// The above line throws the following error.
//
// error: Uncaught TypeError: Cannot read properties of undefined (reading 'href')
// const resolveURL = isBrowser ? (s) => new URL(s, window.location.href).href : (s) => s;
//                                                                  ^
//     at resolveURL (https://cdn.skypack.dev/-/[email protected]/dist=es2019,mode=imports/optimized/tesseractjs.js:313:66)
//     at https://cdn.skypack.dev/-/[email protected]/dist=es2019,mode=imports/optimized/tesseractjs.js:318:19
//     at Array.forEach (<anonymous>)
//     at resolvePaths (https://cdn.skypack.dev/-/[email protected]/dist=es2019,mode=imports/optimized/tesseractjs.js:316:42)
//     at createWorker (https://cdn.skypack.dev/-/[email protected]/dist=es2019,mode=imports/optimized/tesseractjs.js:606:7)
//     at file:///Users/ynkt/tmp/tesseract-deno/main.ts:3:22

Unlike Node.js, Deno has window global so Tesseract.js misunderstands it's running in browsers. As Remix's doc suggests, checks for document is preferred for this reason. This check is also backward compatible in other environments.

I don't claim first-class support for Deno (of course, I'd be happy if you do), but I just wish if I could use Tesseract.js in Deno in some way.

You can find similar PRs merged at other popular libraries like motiondivision/motion#1522, TanStack/virtual#516, melt-ui/melt-ui#14, and chakra-ui/zag#694.

[Balearica]

Thank you for your contribution. Merging. This will be reflected in the next npm release, which will be 4.1.3.