Trait FromJs

pub trait FromJs<'js>: Sized {
    // Required method
    fn from_js(ctx: &Ctx<'js>, value: Value<'js>) -> Result<Self, Error>;
}

For converting JavaScript values to Rust values

This trait automatically converts any value which can be represented as an object, like Array to one if it is required.

Required Methods

fn from_js(ctx: &Ctx<'js>, value: Value<'js>) -> Result<Self, Error>

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<'js> FromJs<'js> for bool

fn from_js(_ctx: &Ctx<'js>, value: Value<'js>) -> Result<bool, Error>

impl<'js> FromJs<'js> for char

fn from_js(_ctx: &Ctx<'js>, value: Value<'js>) -> Result<char, Error>

impl<'js> FromJs<'js> for f32

fn from_js(ctx: &Ctx<'js>, value: Value<'js>) -> Result<f32, Error>

impl<'js> FromJs<'js> for f64

fn from_js(_ctx: &Ctx<'js>, value: Value<'js>) -> Result<f64, Error>

impl<'js> FromJs<'js> for i8

fn from_js(ctx: &Ctx<'js>, value: Value<'js>) -> Result<i8, Error>

impl<'js> FromJs<'js> for i16

fn from_js(ctx: &Ctx<'js>, value: Value<'js>) -> Result<i16, Error>

impl<'js> FromJs<'js> for i32

fn from_js(_ctx: &Ctx<'js>, value: Value<'js>) -> Result<i32, Error>

impl<'js> FromJs<'js> for i64

fn from_js(ctx: &Ctx<'js>, value: Value<'js>) -> Result<i64, Error>

impl<'js> FromJs<'js> for isize

fn from_js(ctx: &Ctx<'js>, value: Value<'js>) -> Result<isize, Error>

impl<'js> FromJs<'js> for u8

fn from_js(ctx: &Ctx<'js>, value: Value<'js>) -> Result<u8, Error>

impl<'js> FromJs<'js> for u16

fn from_js(ctx: &Ctx<'js>, value: Value<'js>) -> Result<u16, Error>

impl<'js> FromJs<'js> for u32

fn from_js(ctx: &Ctx<'js>, value: Value<'js>) -> Result<u32, Error>

impl<'js> FromJs<'js> for u64

fn from_js(ctx: &Ctx<'js>, value: Value<'js>) -> Result<u64, Error>

impl<'js> FromJs<'js> for ()

Convert from JS as any

fn from_js(_: &Ctx<'js>, _: Value<'js>) -> Result<(), Error>

impl<'js> FromJs<'js> for usize

fn from_js(ctx: &Ctx<'js>, value: Value<'js>) -> Result<usize, Error>

impl<'js> FromJs<'js> for String

fn from_js(_ctx: &Ctx<'js>, value: Value<'js>) -> Result<String, Error>

impl<'js> FromJs<'js> for SystemTime

fn from_js(ctx: &Ctx<'js>, value: Value<'js>) -> Result<SystemTime, Error>

impl<'js> FromJs<'js> for DateTime<Local>

fn from_js(ctx: &Ctx<'js>, value: Value<'js>) -> Result<DateTime<Local>, Error>

impl<'js> FromJs<'js> for DateTime<Utc>

fn from_js(ctx: &Ctx<'js>, value: Value<'js>) -> Result<DateTime<Utc>, Error>

impl<'js, K, V> FromJs<'js> for BTreeMap<K, V>

where K: FromAtom<'js> + Eq + Ord, V: FromJs<'js>,

Convert from JS object to Rust btree map

fn from_js(_ctx: &Ctx<'js>, value: Value<'js>) -> Result<BTreeMap<K, V>, Error>

impl<'js, K, V, S> FromJs<'js> for HashMap<K, V, S>

where K: FromAtom<'js> + Eq + Hash, V: FromJs<'js>, S: Default + BuildHasher,

Convert from JS object to Rust hash map

fn from_js( _ctx: &Ctx<'js>, value: Value<'js>, ) -> Result<HashMap<K, V, S>, Error>

impl<'js, K, V, S> FromJs<'js> for IndexMap<K, V, S>

where K: FromAtom<'js> + Eq + Hash, V: FromJs<'js>, S: Default + BuildHasher,

Available on crate feature indexmap only.

Convert from JS object to Rust index map

fn from_js( _ctx: &Ctx<'js>, value: Value<'js>, ) -> Result<IndexMap<K, V, S>, Error>

impl<'js, L, R> FromJs<'js> for Either<L, R>

where L: FromJs<'js>, R: FromJs<'js>,

Available on crate feature either only.

Convert from JS to either

fn from_js(ctx: &Ctx<'js>, value: Value<'js>) -> Result<Either<L, R>, Error>

impl<'js, T> FromJs<'js> for Option<T>

where T: FromJs<'js>,

Convert from JS as optional

fn from_js(ctx: &Ctx<'js>, value: Value<'js>) -> Result<Option<T>, Error>

impl<'js, T> FromJs<'js> for Result<T, Error>

where T: FromJs<'js>,

Convert from JS as result

fn from_js(ctx: &Ctx<'js>, value: Value<'js>) -> Result<Result<T, Error>, Error>

impl<'js, T> FromJs<'js> for Box<T>

where T: FromJs<'js>,

fn from_js(ctx: &Ctx<'js>, value: Value<'js>) -> Result<Box<T>, Error>

impl<'js, T> FromJs<'js> for BTreeSet<T>

where T: FromJs<'js> + Eq + Ord,

Convert from JS array to Rust btree set

fn from_js(_ctx: &Ctx<'js>, value: Value<'js>) -> Result<BTreeSet<T>, Error>

impl<'js, T> FromJs<'js> for LinkedList<T>

where T: FromJs<'js>,

Convert from JS array to Rust linked list

fn from_js(_ctx: &Ctx<'js>, value: Value<'js>) -> Result<LinkedList<T>, Error>

impl<'js, T> FromJs<'js> for VecDeque<T>

where T: FromJs<'js>,

Convert from JS array to Rust vector deque

fn from_js(_ctx: &Ctx<'js>, value: Value<'js>) -> Result<VecDeque<T>, Error>

impl<'js, T> FromJs<'js> for Rc<T>

where T: FromJs<'js>,

fn from_js(ctx: &Ctx<'js>, value: Value<'js>) -> Result<Rc<T>, Error>

impl<'js, T> FromJs<'js> for Arc<T>

where T: FromJs<'js>,

fn from_js(ctx: &Ctx<'js>, value: Value<'js>) -> Result<Arc<T>, Error>

impl<'js, T> FromJs<'js> for Vec<T>

where T: FromJs<'js>,

Convert from JS array to Rust vector

fn from_js(_ctx: &Ctx<'js>, value: Value<'js>) -> Result<Vec<T>, Error>

impl<'js, T> FromJs<'js> for Cell<T>

where T: FromJs<'js>,

fn from_js(ctx: &Ctx<'js>, value: Value<'js>) -> Result<Cell<T>, Error>

impl<'js, T> FromJs<'js> for RefCell<T>

where T: FromJs<'js>,

fn from_js(ctx: &Ctx<'js>, value: Value<'js>) -> Result<RefCell<T>, Error>

impl<'js, T> FromJs<'js> for Mutex<T>

where T: FromJs<'js>,

fn from_js(ctx: &Ctx<'js>, value: Value<'js>) -> Result<Mutex<T>, Error>

impl<'js, T> FromJs<'js> for RwLock<T>

where T: FromJs<'js>,

fn from_js(ctx: &Ctx<'js>, value: Value<'js>) -> Result<RwLock<T>, Error>

impl<'js, T, S> FromJs<'js> for HashSet<T, S>

where T: FromJs<'js> + Eq + Hash, S: Default + BuildHasher,

Convert from JS array to Rust hash set

fn from_js(_ctx: &Ctx<'js>, value: Value<'js>) -> Result<HashSet<T, S>, Error>

impl<'js, T, S> FromJs<'js> for IndexSet<T, S>

where T: FromJs<'js> + Eq + Hash, S: Default + BuildHasher,

Available on crate feature indexmap only.

Convert from JS array to Rust index set

fn from_js(_ctx: &Ctx<'js>, value: Value<'js>) -> Result<IndexSet<T, S>, Error>

Implementors

impl<'js> FromJs<'js> for Constructor<'js>

impl<'js> FromJs<'js> for MaybePromise<'js>

impl<'js> FromJs<'js> for Array<'js>

impl<'js> FromJs<'js> for ArrayBuffer<'js>

impl<'js> FromJs<'js> for BigInt<'js>

impl<'js> FromJs<'js> for CString<'js>

impl<'js> FromJs<'js> for Coerced<bool>

Coerce a value to a bool in the same way JavaScript would coerce values

impl<'js> FromJs<'js> for Coerced<f64>

Coerce a value to a f64 in the same way JavaScript would coerce values

impl<'js> FromJs<'js> for Coerced<i32>

Coerce a value to a i32 in the same way JavaScript would coerce values

impl<'js> FromJs<'js> for Coerced<i64>

Coerce a value to a i64 in the same way JavaScript would coerce values

impl<'js> FromJs<'js> for Coerced<u64>

Coerce a value to a u64 in the same way JavaScript would coerce values

impl<'js> FromJs<'js> for Coerced<String>

Coerce a value to a string in the same way JavaScript would coerce values.

impl<'js> FromJs<'js> for Coerced<String<'js>>

Coerce a value to a string in the same way JavaScript would coerce values.

impl<'js> FromJs<'js> for Exception<'js>

impl<'js> FromJs<'js> for Function<'js>

impl<'js> FromJs<'js> for Null

impl<'js> FromJs<'js> for Object<'js>

impl<'js> FromJs<'js> for Promise<'js>

impl<'js> FromJs<'js> for rquickjs::String<'js>

impl<'js> FromJs<'js> for Symbol<'js>

impl<'js> FromJs<'js> for Undefined

impl<'js> FromJs<'js> for Value<'js>

impl<'js, A> FromJs<'js> for List<(A,)>

where A: FromJs<'js>,

impl<'js, A, B> FromJs<'js> for List<(A, B)>

where A: FromJs<'js>, B: FromJs<'js>,

impl<'js, A, B, C> FromJs<'js> for List<(A, B, C)>

where A: FromJs<'js>, B: FromJs<'js>, C: FromJs<'js>,

impl<'js, A, B, C, D> FromJs<'js> for List<(A, B, C, D)>

where A: FromJs<'js>, B: FromJs<'js>, C: FromJs<'js>, D: FromJs<'js>,

impl<'js, A, B, C, D, E> FromJs<'js> for List<(A, B, C, D, E)>

where A: FromJs<'js>, B: FromJs<'js>, C: FromJs<'js>, D: FromJs<'js>, E: FromJs<'js>,

impl<'js, A, B, C, D, E, F> FromJs<'js> for List<(A, B, C, D, E, F)>

where A: FromJs<'js>, B: FromJs<'js>, C: FromJs<'js>, D: FromJs<'js>, E: FromJs<'js>, F: FromJs<'js>,

impl<'js, A, B, C, D, E, F, G> FromJs<'js> for List<(A, B, C, D, E, F, G)>

where A: FromJs<'js>, B: FromJs<'js>, C: FromJs<'js>, D: FromJs<'js>, E: FromJs<'js>, F: FromJs<'js>, G: FromJs<'js>,

impl<'js, A, B, C, D, E, F, G, H> FromJs<'js> for List<(A, B, C, D, E, F, G, H)>

where A: FromJs<'js>, B: FromJs<'js>, C: FromJs<'js>, D: FromJs<'js>, E: FromJs<'js>, F: FromJs<'js>, G: FromJs<'js>, H: FromJs<'js>,

impl<'js, A, B, C, D, E, F, G, H, I> FromJs<'js> for List<(A, B, C, D, E, F, G, H, I)>

where A: FromJs<'js>, B: FromJs<'js>, C: FromJs<'js>, D: FromJs<'js>, E: FromJs<'js>, F: FromJs<'js>, G: FromJs<'js>, H: FromJs<'js>, I: FromJs<'js>,

impl<'js, A, B, C, D, E, F, G, H, I, J> FromJs<'js> for List<(A, B, C, D, E, F, G, H, I, J)>

where A: FromJs<'js>, B: FromJs<'js>, C: FromJs<'js>, D: FromJs<'js>, E: FromJs<'js>, F: FromJs<'js>, G: FromJs<'js>, H: FromJs<'js>, I: FromJs<'js>, J: FromJs<'js>,

impl<'js, A, B, C, D, E, F, G, H, I, J, K> FromJs<'js> for List<(A, B, C, D, E, F, G, H, I, J, K)>

where A: FromJs<'js>, B: FromJs<'js>, C: FromJs<'js>, D: FromJs<'js>, E: FromJs<'js>, F: FromJs<'js>, G: FromJs<'js>, H: FromJs<'js>, I: FromJs<'js>, J: FromJs<'js>, K: FromJs<'js>,

impl<'js, A, B, C, D, E, F, G, H, I, J, K, L> FromJs<'js> for List<(A, B, C, D, E, F, G, H, I, J, K, L)>

where A: FromJs<'js>, B: FromJs<'js>, C: FromJs<'js>, D: FromJs<'js>, E: FromJs<'js>, F: FromJs<'js>, G: FromJs<'js>, H: FromJs<'js>, I: FromJs<'js>, J: FromJs<'js>, K: FromJs<'js>, L: FromJs<'js>,

impl<'js, A, B, C, D, E, F, G, H, I, J, K, L, M> FromJs<'js> for List<(A, B, C, D, E, F, G, H, I, J, K, L, M)>

where A: FromJs<'js>, B: FromJs<'js>, C: FromJs<'js>, D: FromJs<'js>, E: FromJs<'js>, F: FromJs<'js>, G: FromJs<'js>, H: FromJs<'js>, I: FromJs<'js>, J: FromJs<'js>, K: FromJs<'js>, L: FromJs<'js>, M: FromJs<'js>,

impl<'js, A, B, C, D, E, F, G, H, I, J, K, L, M, N> FromJs<'js> for List<(A, B, C, D, E, F, G, H, I, J, K, L, M, N)>

where A: FromJs<'js>, B: FromJs<'js>, C: FromJs<'js>, D: FromJs<'js>, E: FromJs<'js>, F: FromJs<'js>, G: FromJs<'js>, H: FromJs<'js>, I: FromJs<'js>, J: FromJs<'js>, K: FromJs<'js>, L: FromJs<'js>, M: FromJs<'js>, N: FromJs<'js>,

impl<'js, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O> FromJs<'js> for List<(A, B, C, D, E, F, G, H, I, J, K, L, M, N, O)>

where A: FromJs<'js>, B: FromJs<'js>, C: FromJs<'js>, D: FromJs<'js>, E: FromJs<'js>, F: FromJs<'js>, G: FromJs<'js>, H: FromJs<'js>, I: FromJs<'js>, J: FromJs<'js>, K: FromJs<'js>, L: FromJs<'js>, M: FromJs<'js>, N: FromJs<'js>, O: FromJs<'js>,

impl<'js, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P> FromJs<'js> for List<(A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P)>

where A: FromJs<'js>, B: FromJs<'js>, C: FromJs<'js>, D: FromJs<'js>, E: FromJs<'js>, F: FromJs<'js>, G: FromJs<'js>, H: FromJs<'js>, I: FromJs<'js>, J: FromJs<'js>, K: FromJs<'js>, L: FromJs<'js>, M: FromJs<'js>, N: FromJs<'js>, O: FromJs<'js>, P: FromJs<'js>,

impl<'js, C> FromJs<'js> for Class<'js, C>

where C: JsClass<'js>,

impl<'js, T> FromJs<'js> for OwnedBorrow<'js, T>

where T: JsClass<'js>,

impl<'js, T> FromJs<'js> for OwnedBorrowMut<'js, T>

where T: JsClass<'js>,

impl<'js, T> FromJs<'js> for TypedArray<'js, T>

where T: TypedArrayItem,

impl<'js, T, R> FromJs<'js> for Persistent<R>

where R: JsLifetime<'static, Changed<'js> = T>, T: JsLifetime<'js, Changed<'static> = R> + FromJs<'js>,