Crate wasm_bindgen

Runtime support for the wasm-bindgen tool

This crate contains the runtime support necessary for wasm-bindgen the attribute and tool. Crates pull in the #[wasm_bindgen] attribute through this crate and this crate also provides JS bindings through the JsValue interface.

Re-exports

• pub use crate::cast::JsObject;

Modules

• closure
  Support for long-lived closures in wasm-bindgen
• convert
  ⚠️ Unstable
• prelude
  A module which is typically glob imported.

Macros

• link_to
  This macro takes a JS module as input and returns a URL that can be used to access it at runtime.

Structs

• Clamped
  A wrapper type around slices and vectors for binding the Uint8ClampedArray array in JS.
• JsError
  Convenience type for use on exported fn() -> Result<T, JsError> functions, where you wish to throw a JavaScript Error object.
• JsStaticDeprecated
  Wrapper type for imported statics.
• JsValue
  Representation of an object owned by JS.

Traits

• JsCast
  A trait for checked and unchecked casting between JS types.
• UnwrapThrowExt
  An extension trait for Option<T> and Result<T, E> for unwrapping the T value, or throwing a JS error if it is not available.

Functions

• exports
  Returns a handle to this Wasm instance’s WebAssembly.Instance.prototype.exports
• externref_heap_live_count
  Get the count of live externrefs / JsValues in wasm-bindgen’s heap.
• function_table
  Returns a handle to this Wasm instance’s WebAssembly.Table which is the indirect function table used by Rust
• intern
  Interns Rust strings so that it’s much faster to send them to JS.
• memory
  Returns a handle to this Wasm instance’s WebAssembly.Memory
• module
  Returns a handle to this Wasm instance’s WebAssembly.Module. This is only available when the final Wasm app is built with --target no-modules or --target web.
• throw_str
  Throws a JS exception.
• throw_val
  Rethrow a JS exception
• unintern
  Removes a Rust string from the intern cache.