Struct web_sys::FileReader
source · [−]#[repr(transparent)]pub struct FileReader { /* private fields */ }
Expand description
The FileReader
class.
This API requires the following crate features to be activated: FileReader
Implementations
sourceimpl FileReader
impl FileReader
sourcepub fn ready_state(&self) -> u16
pub fn ready_state(&self) -> u16
Getter for the readyState
field of this object.
This API requires the following crate features to be activated: FileReader
sourceimpl FileReader
impl FileReader
sourceimpl FileReader
impl FileReader
sourcepub fn error(&self) -> Option<DomException>
pub fn error(&self) -> Option<DomException>
Getter for the error
field of this object.
This API requires the following crate features to be activated: DomException
, FileReader
sourceimpl FileReader
impl FileReader
sourcepub fn onloadstart(&self) -> Option<Function>
pub fn onloadstart(&self) -> Option<Function>
Getter for the onloadstart
field of this object.
This API requires the following crate features to be activated: FileReader
sourceimpl FileReader
impl FileReader
sourcepub fn set_onloadstart(&self, value: Option<&Function>)
pub fn set_onloadstart(&self, value: Option<&Function>)
Setter for the onloadstart
field of this object.
This API requires the following crate features to be activated: FileReader
sourceimpl FileReader
impl FileReader
sourcepub fn onprogress(&self) -> Option<Function>
pub fn onprogress(&self) -> Option<Function>
Getter for the onprogress
field of this object.
This API requires the following crate features to be activated: FileReader
sourceimpl FileReader
impl FileReader
sourcepub fn set_onprogress(&self, value: Option<&Function>)
pub fn set_onprogress(&self, value: Option<&Function>)
Setter for the onprogress
field of this object.
This API requires the following crate features to be activated: FileReader
sourceimpl FileReader
impl FileReader
sourceimpl FileReader
impl FileReader
sourcepub fn set_onload(&self, value: Option<&Function>)
pub fn set_onload(&self, value: Option<&Function>)
Setter for the onload
field of this object.
This API requires the following crate features to be activated: FileReader
sourceimpl FileReader
impl FileReader
sourceimpl FileReader
impl FileReader
sourcepub fn set_onabort(&self, value: Option<&Function>)
pub fn set_onabort(&self, value: Option<&Function>)
Setter for the onabort
field of this object.
This API requires the following crate features to be activated: FileReader
sourceimpl FileReader
impl FileReader
sourceimpl FileReader
impl FileReader
sourcepub fn set_onerror(&self, value: Option<&Function>)
pub fn set_onerror(&self, value: Option<&Function>)
Setter for the onerror
field of this object.
This API requires the following crate features to be activated: FileReader
sourceimpl FileReader
impl FileReader
sourceimpl FileReader
impl FileReader
sourcepub fn set_onloadend(&self, value: Option<&Function>)
pub fn set_onloadend(&self, value: Option<&Function>)
Setter for the onloadend
field of this object.
This API requires the following crate features to be activated: FileReader
sourceimpl FileReader
impl FileReader
sourcepub fn new() -> Result<FileReader, JsValue>
pub fn new() -> Result<FileReader, JsValue>
The new FileReader(..)
constructor, creating a new instance of FileReader
.
This API requires the following crate features to be activated: FileReader
sourceimpl FileReader
impl FileReader
sourceimpl FileReader
impl FileReader
sourceimpl FileReader
impl FileReader
sourceimpl FileReader
impl FileReader
sourceimpl FileReader
impl FileReader
sourceimpl FileReader
impl FileReader
Methods from Deref<Target = EventTarget>
sourcepub fn add_event_listener_with_event_listener(
&self,
type_: &str,
listener: &EventListener
) -> Result<(), JsValue>
pub fn add_event_listener_with_event_listener(
&self,
type_: &str,
listener: &EventListener
) -> Result<(), JsValue>
The addEventListener()
method.
This API requires the following crate features to be activated: EventListener
, EventTarget
sourcepub fn add_event_listener_with_callback_and_add_event_listener_options(
&self,
type_: &str,
listener: &Function,
options: &AddEventListenerOptions
) -> Result<(), JsValue>
pub fn add_event_listener_with_callback_and_add_event_listener_options(
&self,
type_: &str,
listener: &Function,
options: &AddEventListenerOptions
) -> Result<(), JsValue>
The addEventListener()
method.
This API requires the following crate features to be activated: AddEventListenerOptions
, EventTarget
sourcepub fn add_event_listener_with_event_listener_and_add_event_listener_options(
&self,
type_: &str,
listener: &EventListener,
options: &AddEventListenerOptions
) -> Result<(), JsValue>
pub fn add_event_listener_with_event_listener_and_add_event_listener_options(
&self,
type_: &str,
listener: &EventListener,
options: &AddEventListenerOptions
) -> Result<(), JsValue>
The addEventListener()
method.
This API requires the following crate features to be activated: AddEventListenerOptions
, EventListener
, EventTarget
sourcepub fn add_event_listener_with_event_listener_and_bool(
&self,
type_: &str,
listener: &EventListener,
options: bool
) -> Result<(), JsValue>
pub fn add_event_listener_with_event_listener_and_bool(
&self,
type_: &str,
listener: &EventListener,
options: bool
) -> Result<(), JsValue>
The addEventListener()
method.
This API requires the following crate features to be activated: EventListener
, EventTarget
sourcepub fn add_event_listener_with_callback_and_add_event_listener_options_and_wants_untrusted(
&self,
type_: &str,
listener: &Function,
options: &AddEventListenerOptions,
wants_untrusted: Option<bool>
) -> Result<(), JsValue>
pub fn add_event_listener_with_callback_and_add_event_listener_options_and_wants_untrusted(
&self,
type_: &str,
listener: &Function,
options: &AddEventListenerOptions,
wants_untrusted: Option<bool>
) -> Result<(), JsValue>
The addEventListener()
method.
This API requires the following crate features to be activated: AddEventListenerOptions
, EventTarget
sourcepub fn add_event_listener_with_event_listener_and_add_event_listener_options_and_wants_untrusted(
&self,
type_: &str,
listener: &EventListener,
options: &AddEventListenerOptions,
wants_untrusted: Option<bool>
) -> Result<(), JsValue>
pub fn add_event_listener_with_event_listener_and_add_event_listener_options_and_wants_untrusted(
&self,
type_: &str,
listener: &EventListener,
options: &AddEventListenerOptions,
wants_untrusted: Option<bool>
) -> Result<(), JsValue>
The addEventListener()
method.
This API requires the following crate features to be activated: AddEventListenerOptions
, EventListener
, EventTarget
sourcepub fn add_event_listener_with_event_listener_and_bool_and_wants_untrusted(
&self,
type_: &str,
listener: &EventListener,
options: bool,
wants_untrusted: Option<bool>
) -> Result<(), JsValue>
pub fn add_event_listener_with_event_listener_and_bool_and_wants_untrusted(
&self,
type_: &str,
listener: &EventListener,
options: bool,
wants_untrusted: Option<bool>
) -> Result<(), JsValue>
The addEventListener()
method.
This API requires the following crate features to be activated: EventListener
, EventTarget
sourcepub fn remove_event_listener_with_event_listener(
&self,
type_: &str,
listener: &EventListener
) -> Result<(), JsValue>
pub fn remove_event_listener_with_event_listener(
&self,
type_: &str,
listener: &EventListener
) -> Result<(), JsValue>
The removeEventListener()
method.
This API requires the following crate features to be activated: EventListener
, EventTarget
sourcepub fn remove_event_listener_with_callback_and_event_listener_options(
&self,
type_: &str,
listener: &Function,
options: &EventListenerOptions
) -> Result<(), JsValue>
pub fn remove_event_listener_with_callback_and_event_listener_options(
&self,
type_: &str,
listener: &Function,
options: &EventListenerOptions
) -> Result<(), JsValue>
The removeEventListener()
method.
This API requires the following crate features to be activated: EventListenerOptions
, EventTarget
sourcepub fn remove_event_listener_with_event_listener_and_event_listener_options(
&self,
type_: &str,
listener: &EventListener,
options: &EventListenerOptions
) -> Result<(), JsValue>
pub fn remove_event_listener_with_event_listener_and_event_listener_options(
&self,
type_: &str,
listener: &EventListener,
options: &EventListenerOptions
) -> Result<(), JsValue>
The removeEventListener()
method.
This API requires the following crate features to be activated: EventListener
, EventListenerOptions
, EventTarget
sourcepub fn remove_event_listener_with_event_listener_and_bool(
&self,
type_: &str,
listener: &EventListener,
options: bool
) -> Result<(), JsValue>
pub fn remove_event_listener_with_event_listener_and_bool(
&self,
type_: &str,
listener: &EventListener,
options: bool
) -> Result<(), JsValue>
The removeEventListener()
method.
This API requires the following crate features to be activated: EventListener
, EventTarget
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<EventTarget> for FileReader
impl AsRef<EventTarget> for FileReader
sourcefn as_ref(&self) -> &EventTarget
fn as_ref(&self) -> &EventTarget
Converts this type into a shared reference of the (usually inferred) input type.
sourceimpl AsRef<FileReader> for FileReader
impl AsRef<FileReader> for FileReader
sourcefn as_ref(&self) -> &FileReader
fn as_ref(&self) -> &FileReader
Converts this type into a shared reference of the (usually inferred) input type.
sourceimpl AsRef<JsValue> for FileReader
impl AsRef<JsValue> for FileReader
sourceimpl AsRef<Object> for FileReader
impl AsRef<Object> for FileReader
sourceimpl Clone for FileReader
impl Clone for FileReader
sourcefn clone(&self) -> FileReader
fn clone(&self) -> FileReader
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 FileReader
impl Debug for FileReader
sourceimpl Deref for FileReader
impl Deref for FileReader
type Target = EventTarget
type Target = EventTarget
The resulting type after dereferencing.
sourcefn deref(&self) -> &EventTarget
fn deref(&self) -> &EventTarget
Dereferences the value.
sourceimpl From<FileReader> for EventTarget
impl From<FileReader> for EventTarget
sourcefn from(obj: FileReader) -> EventTarget
fn from(obj: FileReader) -> EventTarget
Converts to this type from the input type.
sourceimpl From<FileReader> for JsValue
impl From<FileReader> for JsValue
sourcefn from(obj: FileReader) -> JsValue
fn from(obj: FileReader) -> JsValue
Converts to this type from the input type.
sourceimpl From<FileReader> for Object
impl From<FileReader> for Object
sourcefn from(obj: FileReader) -> Object
fn from(obj: FileReader) -> Object
Converts to this type from the input type.
sourceimpl From<JsValue> for FileReader
impl From<JsValue> for FileReader
sourcefn from(obj: JsValue) -> FileReader
fn from(obj: JsValue) -> FileReader
Converts to this type from the input type.
sourceimpl FromWasmAbi for FileReader
impl FromWasmAbi for FileReader
sourceimpl<'a> IntoWasmAbi for &'a FileReader
impl<'a> IntoWasmAbi for &'a FileReader
sourceimpl IntoWasmAbi for FileReader
impl IntoWasmAbi for FileReader
sourceimpl JsCast for FileReader
impl JsCast for FileReader
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) -> bool where
T: JsCast,
fn has_type<T>(&self) -> bool where
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) -> T where
T: JsCast,
fn unchecked_into<T>(self) -> T where
T: JsCast,
Performs a zero-cost unchecked cast into the specified type. Read more
sourcefn unchecked_ref<T>(&self) -> &T where
T: JsCast,
fn unchecked_ref<T>(&self) -> &T where
T: JsCast,
Performs a zero-cost unchecked cast into a reference to the specified type. Read more
sourcefn is_instance_of<T>(&self) -> bool where
T: JsCast,
fn is_instance_of<T>(&self) -> bool where
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 FileReader
impl OptionFromWasmAbi for FileReader
sourceimpl<'a> OptionIntoWasmAbi for &'a FileReader
impl<'a> OptionIntoWasmAbi for &'a FileReader
sourceimpl OptionIntoWasmAbi for FileReader
impl OptionIntoWasmAbi for FileReader
sourceimpl PartialEq<FileReader> for FileReader
impl PartialEq<FileReader> for FileReader
sourcefn eq(&self, other: &FileReader) -> bool
fn eq(&self, other: &FileReader) -> bool
This method tests for self
and other
values to be equal, and is used
by ==
. Read more
sourcefn ne(&self, other: &FileReader) -> bool
fn ne(&self, other: &FileReader) -> bool
This method tests for !=
.
sourceimpl RefFromWasmAbi for FileReader
impl RefFromWasmAbi for FileReader
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<FileReader>
type Anchor = ManuallyDrop<FileReader>
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 FileReader
impl WasmDescribe for FileReader
impl Eq for FileReader
impl StructuralEq for FileReader
impl StructuralPartialEq for FileReader
Auto Trait Implementations
impl RefUnwindSafe for FileReader
impl !Send for FileReader
impl !Sync for FileReader
impl Unpin for FileReader
impl UnwindSafe for FileReader
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
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 T where
T: IntoWasmAbi,
impl<T> ReturnWasmAbi for T where
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