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Kumataro 02cfacfbe7 Merge pull request #30009 from Kumataro:cleanupEmscriptionInstallationGuide
js: doc: clean up Emscripten installation guide and remove outdated C++17 note - #30009

### Summary
- Updated `js_setup.markdown` for modern Emscripten (emsdk 6.x) usage.
- Replaced deprecated `./emsdk update` with `git pull`.
- Replaced outdated version recommendations (`2.0.10`) with `latest` and explicit version fallback (`6.0.9`).
- Removed obsolete Note regarding `--cmake_option="-DCMAKE_CXX_STANDARD=17"`, as OpenCV 5 now defaults to C++17.

### Pull Request Readiness Checklist

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

- [x] I agree to contribute to the project under Apache 2 License.
- [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
- [x] The PR is proposed to the proper branch
- [x] There is a reference to the original bug report and related work
- [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [ ] The feature is well documented and sample code can be built with the project CMake
2026-09-21 12:20:24 +03:00
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2024-04-09 16:06:08 -03:00