wasm-bindgen 0.2.129

on Rust Cargo

Added

• Added the WebGL extension interface EXT_polygon_offset_clamp.
  #5336

• Added the texture-compression-unaligned variant to GpuFeatureName,
  matching the WebGPU specification.
  #5335

• Added an Emscripten Target page to the guide covering the
  wasm32-unknown-emscripten build flow, including the experimental
  #[wasm_bindgen(experimental_tokio)] attribute for driving an exported
  async function on a Tokio event-loop runtime there, gated behind
  --cfg wasm_bindgen_unstable_tokio.
  #5334

• Added experimental JSPI support on the wasm32-unknown-emscripten target,
  gated behind --cfg wasm_bindgen_unstable_jspi: #[wasm_bindgen(jspi)],
  #[wasm_bindgen(suspending)], jspi_block_on_promise and the JSPI context
  inheritance of spawn_local work when linking with -sJSPI and
  -sJSPI_HOOKS (or -sREENTRANT_JSPI). The fibers belong to Emscripten's
  JSPI runtime, which wasm-bindgen integrates with through its lifecycle hook
  exports instead of its own shadow stack management. jspi combines with
  experimental_tokio into a parked runtime: the export is a promising
  activation running its future with block_on on a Tokio runtime whose
  waits are JSPI suspensions, so invocations interleave at every wait.
  #5333

Changed

• Library MSRV bumped from 1.77 to 1.81, per the 2-year MSRV policy.
  #5257

Fixed

• The wasm_bindgen, wasm_bindgen_futures and js_sys crate-path options
  on a #[wasm_bindgen] impl block now apply to its methods; previously they
  were ignored there.
  #5333

• Struct field getters no longer trigger the unsafe_op_in_unsafe_fn lint
  (warn by default in edition 2024) when the field name comes from a
  macro_rules! body, for example through paste!.
  #4465

• The headless test runner now keeps the path of a remote WebDriver URL set
  with variables like CHROMEDRIVER_REMOTE. A driver at
  http://host/wd/hub/ now gets http://host/wd/hub/session instead of
  http://host/session.
  #2841

• The bundler entry module no longer re-exports #[wasm_bindgen(private)]
  items from *_bg.js, which does not export them.
  #5343

• web-sys: WebGL extension interfaces declared with LegacyNoInterfaceObject
  (OVR_multiview2, WEBGL_multi_draw, EXT_polygon_offset_clamp) now
  generate is_type_of = |_| false like their NoInterfaceObject counterparts.
  #5336

• The blanket From<E: Error> for JsError impl is now available without the
  std feature, using core::error::Error, so ? works in no_std crates.
  #5029

• Emscripten output no longer emits the instance reinit machinery, which
  Emscripten's JS compiler rejected (unescaped multi-line __postset, and
  var reinit_scheduled = let ...): schedule_reinit() is a no-op there since
  Emscripten owns instantiation. The closure finalization __postset is now
  emitted as an escaped string literal.
  #5332

• Updated walrus to 0.27.2, fixing --keep-debug output that wasm-opt -g
  could not process: .debug_loc entries for removed code were unparseable
  (debug_loc error), and DW_AT_high_pc was re-encoded as variable-width
  udata (compile unit size was incorrect).
  #5328

• The headless test runner no longer hangs on a WebDriver that never answers, or on
  a browser holding the driver's stdio pipes open.
  #5338

• The CLI's schema version mismatch error now names the input Wasm file and
  the path of the running wasm-bindgen binary.
  #4430

• #[wasm_bindgen(inspectable)] on a tuple struct no longer generates invalid
  JavaScript. The generated toJSON now reads the 0, 1, ... fields as
  this["0"] instead of this.0.
  #2573