Trait TryFromJs 

pub trait TryFromJs: Sized {
    // Required method
    fn try_from_js(
        value: &JsValue,
        context: &mut Context,
    ) -> Result<Self, JsError>;
}

This trait adds a fallible and efficient conversions from a JsValue to Rust types.

Required Methods

fn try_from_js(value: &JsValue, context: &mut Context) -> Result<Self, JsError>

This function tries to convert a JavaScript value into Self.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl TryFromJs for bool

fn try_from_js(value: &JsValue, _context: &mut Context) -> Result<bool, JsError>

impl TryFromJs for f64

fn try_from_js(value: &JsValue, _context: &mut Context) -> Result<f64, JsError>

impl TryFromJs for i8

fn try_from_js(value: &JsValue, _context: &mut Context) -> Result<i8, JsError>

impl TryFromJs for i16

fn try_from_js(value: &JsValue, _context: &mut Context) -> Result<i16, JsError>

impl TryFromJs for i32

fn try_from_js(value: &JsValue, _context: &mut Context) -> Result<i32, JsError>

impl TryFromJs for i64

fn try_from_js(value: &JsValue, _context: &mut Context) -> Result<i64, JsError>

impl TryFromJs for i128

fn try_from_js(value: &JsValue, _context: &mut Context) -> Result<i128, JsError>

impl TryFromJs for u8

fn try_from_js(value: &JsValue, _context: &mut Context) -> Result<u8, JsError>

impl TryFromJs for u16

fn try_from_js(value: &JsValue, _context: &mut Context) -> Result<u16, JsError>

impl TryFromJs for u32

fn try_from_js(value: &JsValue, _context: &mut Context) -> Result<u32, JsError>

impl TryFromJs for u64

fn try_from_js(value: &JsValue, _context: &mut Context) -> Result<u64, JsError>

impl TryFromJs for u128

fn try_from_js(value: &JsValue, _context: &mut Context) -> Result<u128, JsError>

impl TryFromJs for ()

fn try_from_js(_value: &JsValue, _context: &mut Context) -> Result<(), JsError>

impl TryFromJs for usize

fn try_from_js( value: &JsValue, _context: &mut Context, ) -> Result<usize, JsError>

impl TryFromJs for String

fn try_from_js( value: &JsValue, _context: &mut Context, ) -> Result<String, JsError>

impl TryFromJs for BigInt

fn try_from_js( value: &JsValue, _context: &mut Context, ) -> Result<BigInt, JsError>

impl<A> TryFromJs for (A,)

where A: TryFromJs,

fn try_from_js(value: &JsValue, context: &mut Context) -> Result<(A,), JsError>

impl<A, B> TryFromJs for (A, B)

where A: TryFromJs, B: TryFromJs,

fn try_from_js( value: &JsValue, context: &mut Context, ) -> Result<(A, B), JsError>

impl<A, B, C> TryFromJs for (A, B, C)

where A: TryFromJs, B: TryFromJs, C: TryFromJs,

fn try_from_js( value: &JsValue, context: &mut Context, ) -> Result<(A, B, C), JsError>

impl<A, B, C, D> TryFromJs for (A, B, C, D)

where A: TryFromJs, B: TryFromJs, C: TryFromJs, D: TryFromJs,

fn try_from_js( value: &JsValue, context: &mut Context, ) -> Result<(A, B, C, D), JsError>

impl<A, B, C, D, E> TryFromJs for (A, B, C, D, E)

where A: TryFromJs, B: TryFromJs, C: TryFromJs, D: TryFromJs, E: TryFromJs,

fn try_from_js( value: &JsValue, context: &mut Context, ) -> Result<(A, B, C, D, E), JsError>

impl<A, B, C, D, E, F> TryFromJs for (A, B, C, D, E, F)

where A: TryFromJs, B: TryFromJs, C: TryFromJs, D: TryFromJs, E: TryFromJs, F: TryFromJs,

fn try_from_js( value: &JsValue, context: &mut Context, ) -> Result<(A, B, C, D, E, F), JsError>

impl<A, B, C, D, E, F, G> TryFromJs for (A, B, C, D, E, F, G)

where A: TryFromJs, B: TryFromJs, C: TryFromJs, D: TryFromJs, E: TryFromJs, F: TryFromJs, G: TryFromJs,

fn try_from_js( value: &JsValue, context: &mut Context, ) -> Result<(A, B, C, D, E, F, G), JsError>

impl<A, B, C, D, E, F, G, H> TryFromJs for (A, B, C, D, E, F, G, H)

where A: TryFromJs, B: TryFromJs, C: TryFromJs, D: TryFromJs, E: TryFromJs, F: TryFromJs, G: TryFromJs, H: TryFromJs,

fn try_from_js( value: &JsValue, context: &mut Context, ) -> Result<(A, B, C, D, E, F, G, H), JsError>

impl<A, B, C, D, E, F, G, H, I> TryFromJs for (A, B, C, D, E, F, G, H, I)

where A: TryFromJs, B: TryFromJs, C: TryFromJs, D: TryFromJs, E: TryFromJs, F: TryFromJs, G: TryFromJs, H: TryFromJs, I: TryFromJs,

fn try_from_js( value: &JsValue, context: &mut Context, ) -> Result<(A, B, C, D, E, F, G, H, I), JsError>

impl<A, B, C, D, E, F, G, H, I, J> TryFromJs for (A, B, C, D, E, F, G, H, I, J)

where A: TryFromJs, B: TryFromJs, C: TryFromJs, D: TryFromJs, E: TryFromJs, F: TryFromJs, G: TryFromJs, H: TryFromJs, I: TryFromJs, J: TryFromJs,

fn try_from_js( value: &JsValue, context: &mut Context, ) -> Result<(A, B, C, D, E, F, G, H, I, J), JsError>

impl<K, V> TryFromJs for BTreeMap<K, V>

where K: TryFromJs + Ord, V: TryFromJs,

fn try_from_js( value: &JsValue, context: &mut Context, ) -> Result<BTreeMap<K, V>, JsError>

impl<K, V, S> TryFromJs for HashMap<K, V, S>

where K: TryFromJs + Ord + Hash, V: TryFromJs, S: BuildHasher + Default,

fn try_from_js( value: &JsValue, context: &mut Context, ) -> Result<HashMap<K, V, S>, JsError>

impl<L, R> TryFromJs for Either<L, R>

where L: TryFromJs, R: TryFromJs,

fn try_from_js( value: &JsValue, context: &mut Context, ) -> Result<Either<L, R>, JsError>

impl<T> TryFromJs for Option<T>

where T: TryFromJs,

fn try_from_js( value: &JsValue, context: &mut Context, ) -> Result<Option<T>, JsError>

impl<T> TryFromJs for Vec<T>

where T: TryFromJs,

fn try_from_js( value: &JsValue, context: &mut Context, ) -> Result<Vec<T>, JsError>

Implementors

impl TryFromJs for ResponseType

impl TryFromJs for StructuredCloneOptions

impl TryFromJs for JsHeaders

impl TryFromJs for RequestInit

impl TryFromJs for JsResponseOptions

impl TryFromJs for PostMessageOptions

impl TryFromJs for JsArray

impl TryFromJs for JsArrayBuffer

impl TryFromJs for JsBigInt64Array

impl TryFromJs for JsBigUint64Array

impl TryFromJs for JsDataView

impl TryFromJs for JsDate

impl TryFromJs for JsFloat16Array

impl TryFromJs for JsFloat32Array

impl TryFromJs for JsFloat64Array

impl TryFromJs for JsFunction

impl TryFromJs for JsGenerator

impl TryFromJs for JsInt8Array

impl TryFromJs for JsInt16Array

impl TryFromJs for JsInt32Array

impl TryFromJs for JsMap

impl TryFromJs for JsMapIterator

impl TryFromJs for JsPromise

impl TryFromJs for JsProxy

impl TryFromJs for JsRegExp

impl TryFromJs for JsSet

impl TryFromJs for JsSetIterator

impl TryFromJs for JsSharedArrayBuffer

impl TryFromJs for JsTypedArray

impl TryFromJs for JsUint8Array

impl TryFromJs for JsUint8ClampedArray

impl TryFromJs for JsUint16Array

impl TryFromJs for JsUint32Array

impl TryFromJs for JsBigInt

impl TryFromJs for JsObject

impl TryFromJs for JsString

impl TryFromJs for JsValue

impl TryFromJs for Convert<bool>

impl TryFromJs for Convert<f64>

impl TryFromJs for Convert<i8>

impl TryFromJs for Convert<i16>

impl TryFromJs for Convert<i32>

impl TryFromJs for Convert<u8>

impl TryFromJs for Convert<u16>

impl TryFromJs for Convert<u32>

impl TryFromJs for Convert<JsString>

impl TryFromJs for Convert<String>

impl<A, R> TryFromJs for TypedJsFunction<A, R>

where A: TryIntoJsArguments, R: TryFromJs,

impl<T> TryFromJs for Nullable<T>

where T: TryFromJs,