Expand description
Runtime support for thewasm-bindgen tool
This crate contains the runtime support necessary forwasm-bindgen theattribute and tool. Crates pull in the#[wasm_bindgen] attribute throughthis crate and this crate also provides JS bindings through theJsValueinterface.
§Features
§enable-interning
Enables the internal cache for [wasm_bindgen::intern].
This feature currently enables thestd feature, meaning that it is notcompatible withno_std environments.
§std (default)
Enabling this feature will make the crate depend on the Rust standard library.
Disable this feature to use this crate inno_std environments.
§strict-macro
All warnings the#[wasm_bindgen] macro emits are turned into hard errors.This mainly affects unused attribute options.
§Deprecated features
§serde-serialize
Deprecated: Use theserde-wasm-bindgen crate instead.
Enables theJsValue::from_serde andJsValue::into_serde methods forserializing and deserializing Rust types to and from JavaScript.
§spans
Deprecated: This feature became a no-op in wasm-bindgen v0.2.20 (Sep 7, 2018).
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 toaccess it at runtime.
Structs§
- Clamped
- A wrapper type around slices and vectors for binding the
Uint8ClampedArrayarray in JS. - JsError
- Convenience type for use on exported
fn() -> Result<T, JsError>functions, where you wish tothrow a JavaScriptErrorobject. - JsStatic
Deprecated - Wrapper type for imported statics.
- JsThread
Local - 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.
- Unwrap
Throw Ext - An extension trait for
Option<T>andResult<T, E>for unwrapping theTvalue, 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 inwasm-bindgen’s heap. - function_
table - Returns a handle to this Wasm instance’s
WebAssembly.Tablewhich is theindirect 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-modulesor--target web. - throw_
str - Throws a JS exception.
- throw_
val - Rethrow a JS exception
- unintern
- Removes a Rust string from the intern cache.