Expand description
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.
§Features
§enable-interning
Enables the internal cache for [wasm_bindgen::intern
].
This feature currently enables the std
feature, meaning that it is not
compatible with no_std
environments.
§std
(default)
Enabling this feature will make the crate depend on the Rust standard library.
Disable this feature to use this crate in no_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 the serde-wasm-bindgen
crate instead.
Enables the JsValue::from_serde
and JsValue::into_serde
methods for
serializing 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 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 JavaScriptError
object. - 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 theT
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
externref
s /JsValue
s inwasm-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.