HDF5 in the browser
HDF5 in the browser
Native Javascript and WebAssembly tools for working with HDF5
HDF5 User Group Meeting, 2022-05-31 Brian Maranville, NIST Center for Neutron Research
Why native HDF tools for the web
? ...when web-based user interfaces already exist?
? Cloud-native HSDS ? @H5Web + h5grove (light Python server)
? These scale to infinity, but less well to zero!
Use case: New or "casual" users of with a handful of (small) HDF5 files With a web browser, they can jump in and start working...
Native HDF5 in the browser
jsfive: lightweight Javascript library
? Ported from pyfive ? Partial implementation of HDF5 file specification in pure ES6 ? Loads from JS ArrayBuffer ? Read-only, no modification or create ? Small: bundled ESM including ZLIB = 176kB
Native HDF5 in the browser
jsfive: datatype support
? Read Datasets:
?Float32, Float64 ?Int8, Int16, Int32, Int64 ?Uint8, Uint16, Uint32, Uint64 ?ENUM (as base type) ?String (fixed length) ?Returns Array of JS Number type (flat)
? Read attributes:
?Same numeric types as Datasets, plus VLEN_STRING ?Returns Object {key: value}
Native HDF5 in the browser
jsfive: filters supported
? Shuffle ? GZIP deflate (from pako library) ? Fletcher32
Native HDF5 in the browser
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