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Detect browsers in a Deno-compatible way #821

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merged 1 commit into from Sep 11, 2023
Merged

Detect browsers in a Deno-compatible way #821

merged 1 commit into from Sep 11, 2023

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yudai-nkt
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@yudai-nkt yudai-nkt commented Sep 9, 2023 •
edited

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/tesseract.js@4.1.2?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/-/tesseract.js@v4.1.2-tN0T6LCzDNBo5QPjk3os/dist=es2019,mode=imports/optimized/tesseractjs.js:313:66)
//     at https://cdn.skypack.dev/-/tesseract.js@v4.1.2-tN0T6LCzDNBo5QPjk3os/dist=es2019,mode=imports/optimized/tesseractjs.js:318:19
//     at Array.forEach (<anonymous>)
//     at resolvePaths (https://cdn.skypack.dev/-/tesseract.js@v4.1.2-tN0T6LCzDNBo5QPjk3os/dist=es2019,mode=imports/optimized/tesseractjs.js:316:42)
//     at createWorker (https://cdn.skypack.dev/-/tesseract.js@v4.1.2-tN0T6LCzDNBo5QPjk3os/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 framer/motion#1522, TanStack/virtual#516, melt-ui/melt-ui#14, and chakra-ui/zag#694.

@Balearica
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Balearica commented Sep 11, 2023 •
edited

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

@Balearica Balearica merged commit d23a8d5 into naptha:master Sep 11, 2023
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@yudai-nkt yudai-nkt deleted the deno-compatible-browser-detection branch September 28, 2023 14:04
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@yudai-nkt @Balearica