Struct web_sys::ErrorCallback
source · [−]#[repr(transparent)]pub struct ErrorCallback { /* private fields */ }
Expand description
The ErrorCallback
dictionary.
This API requires the following crate features to be activated: ErrorCallback
Implementations
sourceimpl ErrorCallback
impl ErrorCallback
sourcepub fn new() -> Self
pub fn new() -> Self
Construct a new ErrorCallback
.
This API requires the following crate features to be activated: ErrorCallback
sourcepub fn handle_event(&mut self, val: &Function) -> &mut Self
pub fn handle_event(&mut self, val: &Function) -> &mut Self
Change the handleEvent
field of this object.
This API requires the following crate features to be activated: ErrorCallback
Methods from Deref<Target = Object>
sourcepub fn constructor(&self) -> Function
pub fn constructor(&self) -> Function
The constructor property returns a reference to the Object
constructor
function that created the instance object.
sourcepub fn has_own_property(&self, property: &JsValue) -> bool
pub fn has_own_property(&self, property: &JsValue) -> bool
The hasOwnProperty()
method returns a boolean indicating whether the
object has the specified property as its own property (as opposed to
inheriting it).
sourcepub fn is_prototype_of(&self, value: &JsValue) -> bool
pub fn is_prototype_of(&self, value: &JsValue) -> bool
The isPrototypeOf()
method checks if an object exists in another
object’s prototype chain.
sourcepub fn property_is_enumerable(&self, property: &JsValue) -> bool
pub fn property_is_enumerable(&self, property: &JsValue) -> bool
The propertyIsEnumerable()
method returns a Boolean indicating
whether the specified property is enumerable.
sourcepub fn to_locale_string(&self) -> JsString
pub fn to_locale_string(&self) -> JsString
The toLocaleString()
method returns a string representing the object.
This method is meant to be overridden by derived objects for
locale-specific purposes.
Methods from Deref<Target = JsValue>
pub const NULL: JsValue = JsValue{ idx: JSIDX_NULL, _marker: marker::PhantomData,}
pub const UNDEFINED: JsValue = JsValue{ idx: JSIDX_UNDEFINED, _marker: marker::PhantomData,}
pub const TRUE: JsValue = JsValue{ idx: JSIDX_TRUE, _marker: marker::PhantomData,}
pub const FALSE: JsValue = JsValue{ idx: JSIDX_FALSE, _marker: marker::PhantomData,}
sourcepub fn as_f64(&self) -> Option<f64>
pub fn as_f64(&self) -> Option<f64>
Returns the f64
value of this JS value if it’s an instance of a
number.
If this JS value is not an instance of a number then this returns
None
.
sourcepub fn as_string(&self) -> Option<String>
pub fn as_string(&self) -> Option<String>
If this JS value is a string value, this function copies the JS string
value into wasm linear memory, encoded as UTF-8, and returns it as a
Rust String
.
To avoid the copying and re-encoding, consider the
JsString::try_from()
function from js-sys
instead.
If this JS value is not an instance of a string or if it’s not valid
utf-8 then this returns None
.
UTF-16 vs UTF-8
JavaScript strings in general are encoded as UTF-16, but Rust strings
are encoded as UTF-8. This can cause the Rust string to look a bit
different than the JS string sometimes. For more details see the
documentation about the str
type which contains a few
caveats about the encodings.
sourcepub fn as_bool(&self) -> Option<bool>
pub fn as_bool(&self) -> Option<bool>
Returns the bool
value of this JS value if it’s an instance of a
boolean.
If this JS value is not an instance of a boolean then this returns
None
.
sourcepub fn is_undefined(&self) -> bool
pub fn is_undefined(&self) -> bool
Tests whether this JS value is undefined
sourcepub fn is_function(&self) -> bool
pub fn is_function(&self) -> bool
Tests whether the type of this JS value is function
.
sourcepub fn js_in(&self, obj: &JsValue) -> bool
pub fn js_in(&self, obj: &JsValue) -> bool
Applies the binary in
JS operator on the two JsValue
s.
sourcepub fn loose_eq(&self, other: &JsValue) -> bool
pub fn loose_eq(&self, other: &JsValue) -> bool
Compare two JsValue
s for equality, using the ==
operator in JS.
sourcepub fn unsigned_shr(&self, rhs: &JsValue) -> u32
pub fn unsigned_shr(&self, rhs: &JsValue) -> u32
Applies the binary >>>
JS operator on the two JsValue
s.
sourcepub fn checked_div(&self, rhs: &JsValue) -> JsValue
pub fn checked_div(&self, rhs: &JsValue) -> JsValue
Applies the binary /
JS operator on two JsValue
s, catching and returning any RangeError
thrown.
sourcepub fn pow(&self, rhs: &JsValue) -> JsValue
pub fn pow(&self, rhs: &JsValue) -> JsValue
Applies the binary **
JS operator on the two JsValue
s.
sourcepub fn lt(&self, other: &JsValue) -> bool
pub fn lt(&self, other: &JsValue) -> bool
Applies the binary <
JS operator on the two JsValue
s.
sourcepub fn le(&self, other: &JsValue) -> bool
pub fn le(&self, other: &JsValue) -> bool
Applies the binary <=
JS operator on the two JsValue
s.
sourcepub fn ge(&self, other: &JsValue) -> bool
pub fn ge(&self, other: &JsValue) -> bool
Applies the binary >=
JS operator on the two JsValue
s.
sourcepub fn gt(&self, other: &JsValue) -> bool
pub fn gt(&self, other: &JsValue) -> bool
Applies the binary >
JS operator on the two JsValue
s.
sourcepub fn unchecked_into_f64(&self) -> f64
pub fn unchecked_into_f64(&self) -> f64
Applies the unary +
JS operator on a JsValue
. Can throw.
Trait Implementations
sourceimpl AsRef<ErrorCallback> for ErrorCallback
impl AsRef<ErrorCallback> for ErrorCallback
sourcefn as_ref(&self) -> &ErrorCallback
fn as_ref(&self) -> &ErrorCallback
Converts this type into a shared reference of the (usually inferred) input type.
sourceimpl AsRef<JsValue> for ErrorCallback
impl AsRef<JsValue> for ErrorCallback
sourceimpl AsRef<Object> for ErrorCallback
impl AsRef<Object> for ErrorCallback
sourceimpl Clone for ErrorCallback
impl Clone for ErrorCallback
sourcefn clone(&self) -> ErrorCallback
fn clone(&self) -> ErrorCallback
Returns a copy of the value. Read more
1.0.0 · sourcefn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
sourceimpl Debug for ErrorCallback
impl Debug for ErrorCallback
sourceimpl Default for ErrorCallback
impl Default for ErrorCallback
sourceimpl Deref for ErrorCallback
impl Deref for ErrorCallback
sourceimpl From<ErrorCallback> for JsValue
impl From<ErrorCallback> for JsValue
sourcefn from(obj: ErrorCallback) -> JsValue
fn from(obj: ErrorCallback) -> JsValue
Converts to this type from the input type.
sourceimpl From<ErrorCallback> for Object
impl From<ErrorCallback> for Object
sourcefn from(obj: ErrorCallback) -> Object
fn from(obj: ErrorCallback) -> Object
Converts to this type from the input type.
sourceimpl From<JsValue> for ErrorCallback
impl From<JsValue> for ErrorCallback
sourcefn from(obj: JsValue) -> ErrorCallback
fn from(obj: JsValue) -> ErrorCallback
Converts to this type from the input type.
sourceimpl FromWasmAbi for ErrorCallback
impl FromWasmAbi for ErrorCallback
sourceimpl<'a> IntoWasmAbi for &'a ErrorCallback
impl<'a> IntoWasmAbi for &'a ErrorCallback
sourceimpl IntoWasmAbi for ErrorCallback
impl IntoWasmAbi for ErrorCallback
sourceimpl JsCast for ErrorCallback
impl JsCast for ErrorCallback
sourcefn instanceof(val: &JsValue) -> bool
fn instanceof(val: &JsValue) -> bool
Performs a dynamic instanceof
check to see whether the JsValue
provided is an instance of this type. Read more
sourcefn unchecked_from_js(val: JsValue) -> Self
fn unchecked_from_js(val: JsValue) -> Self
Performs a zero-cost unchecked conversion from a JsValue
into an
instance of Self
Read more
sourcefn unchecked_from_js_ref(val: &JsValue) -> &Self
fn unchecked_from_js_ref(val: &JsValue) -> &Self
Performs a zero-cost unchecked conversion from a &JsValue
into an
instance of &Self
. Read more
sourcefn has_type<T>(&self) -> boolwhere
T: JsCast,
fn has_type<T>(&self) -> boolwhere
T: JsCast,
Test whether this JS value has a type T
. Read more
sourcefn dyn_into<T>(self) -> Result<T, Self>where
T: JsCast,
fn dyn_into<T>(self) -> Result<T, Self>where
T: JsCast,
Performs a dynamic cast (checked at runtime) of this value into the
target type T
. Read more
sourcefn dyn_ref<T>(&self) -> Option<&T>where
T: JsCast,
fn dyn_ref<T>(&self) -> Option<&T>where
T: JsCast,
Performs a dynamic cast (checked at runtime) of this value into the
target type T
. Read more
sourcefn unchecked_into<T>(self) -> Twhere
T: JsCast,
fn unchecked_into<T>(self) -> Twhere
T: JsCast,
Performs a zero-cost unchecked cast into the specified type. Read more
sourcefn unchecked_ref<T>(&self) -> &Twhere
T: JsCast,
fn unchecked_ref<T>(&self) -> &Twhere
T: JsCast,
Performs a zero-cost unchecked cast into a reference to the specified type. Read more
sourcefn is_instance_of<T>(&self) -> boolwhere
T: JsCast,
fn is_instance_of<T>(&self) -> boolwhere
T: JsCast,
Test whether this JS value is an instance of the type T
. Read more
sourcefn is_type_of(val: &JsValue) -> bool
fn is_type_of(val: &JsValue) -> bool
Performs a dynamic check to see whether the JsValue
provided
is a value of this type. Read more
sourceimpl OptionFromWasmAbi for ErrorCallback
impl OptionFromWasmAbi for ErrorCallback
sourceimpl<'a> OptionIntoWasmAbi for &'a ErrorCallback
impl<'a> OptionIntoWasmAbi for &'a ErrorCallback
sourceimpl OptionIntoWasmAbi for ErrorCallback
impl OptionIntoWasmAbi for ErrorCallback
sourceimpl PartialEq<ErrorCallback> for ErrorCallback
impl PartialEq<ErrorCallback> for ErrorCallback
sourcefn eq(&self, other: &ErrorCallback) -> bool
fn eq(&self, other: &ErrorCallback) -> bool
This method tests for self
and other
values to be equal, and is used
by ==
. Read more
sourceimpl RefFromWasmAbi for ErrorCallback
impl RefFromWasmAbi for ErrorCallback
type Abi = <JsValue as RefFromWasmAbi>::Abi
type Abi = <JsValue as RefFromWasmAbi>::Abi
The wasm ABI type references to Self
are recovered from.
type Anchor = ManuallyDrop<ErrorCallback>
type Anchor = ManuallyDrop<ErrorCallback>
The type that holds the reference to Self
for the duration of the
invocation of the function that has an &Self
parameter. This is
required to ensure that the lifetimes don’t persist beyond one function
call, and so that they remain anonymous. Read more
sourceunsafe fn ref_from_abi(js: Self::Abi) -> Self::Anchor
unsafe fn ref_from_abi(js: Self::Abi) -> Self::Anchor
Recover a Self::Anchor
from Self::Abi
. Read more
sourceimpl WasmDescribe for ErrorCallback
impl WasmDescribe for ErrorCallback
impl Eq for ErrorCallback
impl StructuralEq for ErrorCallback
impl StructuralPartialEq for ErrorCallback
Auto Trait Implementations
impl RefUnwindSafe for ErrorCallback
impl !Send for ErrorCallback
impl !Sync for ErrorCallback
impl Unpin for ErrorCallback
impl UnwindSafe for ErrorCallback
Blanket Implementations
sourceimpl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<T> ReturnWasmAbi for Twhere
T: IntoWasmAbi,
impl<T> ReturnWasmAbi for Twhere
T: IntoWasmAbi,
type Abi = <T as IntoWasmAbi>::Abi
type Abi = <T as IntoWasmAbi>::Abi
Same as IntoWasmAbi::Abi
sourcefn return_abi(self) -> <T as ReturnWasmAbi>::Abi
fn return_abi(self) -> <T as ReturnWasmAbi>::Abi
Same as IntoWasmAbi::into_abi
, except that it may throw and never
return in the case of Err
. Read more