Struct web_sys::FileReader
source · pub struct FileReader { /* private fields */ }
Expand description
The FileReader
class.
This API requires the following crate features to be activated: FileReader
Implementations§
source§impl 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
source§impl FileReader
impl FileReader
source§impl 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
source§impl 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
source§impl 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
source§impl 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
source§impl FileReader
impl FileReader
source§impl 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
source§impl FileReader
impl FileReader
source§impl 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
source§impl FileReader
impl FileReader
source§impl 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
source§impl FileReader
impl FileReader
source§impl 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
source§impl 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
source§impl FileReader
impl FileReader
source§impl FileReader
impl FileReader
source§impl FileReader
impl FileReader
source§impl FileReader
impl FileReader
source§impl FileReader
impl FileReader
source§impl FileReader
impl FileReader
Methods from Deref<Target = EventTarget>§
sourcepub fn add_event_listener_with_callback(
&self,
type_: &str,
listener: &Function
) -> Result<(), JsValue>
pub fn add_event_listener_with_callback( &self, type_: &str, listener: &Function ) -> Result<(), JsValue>
The addEventListener()
method.
This API requires the following crate features to be activated: EventTarget
sourcepub fn add_event_listener_with_callback_and_bool(
&self,
type_: &str,
listener: &Function,
options: bool
) -> Result<(), JsValue>
pub fn add_event_listener_with_callback_and_bool( &self, type_: &str, listener: &Function, options: bool ) -> Result<(), JsValue>
The addEventListener()
method.
This API requires the following crate features to be activated: EventTarget
sourcepub fn add_event_listener_with_callback_and_bool_and_wants_untrusted(
&self,
type_: &str,
listener: &Function,
options: bool,
wants_untrusted: Option<bool>
) -> Result<(), JsValue>
pub fn add_event_listener_with_callback_and_bool_and_wants_untrusted( &self, type_: &str, listener: &Function, options: bool, wants_untrusted: Option<bool> ) -> Result<(), JsValue>
The addEventListener()
method.
This API requires the following crate features to be activated: EventTarget
sourcepub fn dispatch_event(&self, event: &Event) -> Result<bool, JsValue>
pub fn dispatch_event(&self, event: &Event) -> Result<bool, JsValue>
The dispatchEvent()
method.
This API requires the following crate features to be activated: Event
, EventTarget
sourcepub fn remove_event_listener_with_callback(
&self,
type_: &str,
listener: &Function
) -> Result<(), JsValue>
pub fn remove_event_listener_with_callback( &self, type_: &str, listener: &Function ) -> Result<(), JsValue>
The removeEventListener()
method.
This API requires the following crate features to be activated: 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.
sourcepub fn to_string(&self) -> JsString
pub fn to_string(&self) -> JsString
The toString()
method returns a string representing the object.
Methods from Deref<Target = JsValue>§
pub const NULL: JsValue = _
pub const UNDEFINED: JsValue = _
pub const TRUE: JsValue = _
pub const FALSE: JsValue = _
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§
source§impl AsRef<EventTarget> for FileReader
impl AsRef<EventTarget> for FileReader
source§fn as_ref(&self) -> &EventTarget
fn as_ref(&self) -> &EventTarget
source§impl AsRef<FileReader> for FileReader
impl AsRef<FileReader> for FileReader
source§fn as_ref(&self) -> &FileReader
fn as_ref(&self) -> &FileReader
source§impl AsRef<JsValue> for FileReader
impl AsRef<JsValue> for FileReader
source§impl AsRef<Object> for FileReader
impl AsRef<Object> for FileReader
source§impl Clone for FileReader
impl Clone for FileReader
source§fn clone(&self) -> FileReader
fn clone(&self) -> FileReader
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for FileReader
impl Debug for FileReader
source§impl Deref for FileReader
impl Deref for FileReader
§type Target = EventTarget
type Target = EventTarget
source§fn deref(&self) -> &EventTarget
fn deref(&self) -> &EventTarget
source§impl From<FileReader> for EventTarget
impl From<FileReader> for EventTarget
source§fn from(obj: FileReader) -> EventTarget
fn from(obj: FileReader) -> EventTarget
source§impl From<FileReader> for JsValue
impl From<FileReader> for JsValue
source§fn from(obj: FileReader) -> JsValue
fn from(obj: FileReader) -> JsValue
source§impl From<FileReader> for Object
impl From<FileReader> for Object
source§fn from(obj: FileReader) -> Object
fn from(obj: FileReader) -> Object
source§impl From<JsValue> for FileReader
impl From<JsValue> for FileReader
source§fn from(obj: JsValue) -> FileReader
fn from(obj: JsValue) -> FileReader
source§impl FromWasmAbi for FileReader
impl FromWasmAbi for FileReader
source§impl<'a> IntoWasmAbi for &'a FileReader
impl<'a> IntoWasmAbi for &'a FileReader
source§impl IntoWasmAbi for FileReader
impl IntoWasmAbi for FileReader
source§impl JsCast for FileReader
impl JsCast for FileReader
source§fn instanceof(val: &JsValue) -> bool
fn instanceof(val: &JsValue) -> bool
instanceof
check to see whether the JsValue
provided is an instance of this type. Read moresource§fn unchecked_from_js(val: JsValue) -> Self
fn unchecked_from_js(val: JsValue) -> Self
source§fn unchecked_from_js_ref(val: &JsValue) -> &Self
fn unchecked_from_js_ref(val: &JsValue) -> &Self
source§fn has_type<T>(&self) -> boolwhere
T: JsCast,
fn has_type<T>(&self) -> boolwhere T: JsCast,
T
. Read moresource§fn dyn_into<T>(self) -> Result<T, Self>where
T: JsCast,
fn dyn_into<T>(self) -> Result<T, Self>where T: JsCast,
T
. Read moresource§fn dyn_ref<T>(&self) -> Option<&T>where
T: JsCast,
fn dyn_ref<T>(&self) -> Option<&T>where T: JsCast,
T
. Read moresource§fn unchecked_into<T>(self) -> Twhere
T: JsCast,
fn unchecked_into<T>(self) -> Twhere T: JsCast,
source§fn unchecked_ref<T>(&self) -> &Twhere
T: JsCast,
fn unchecked_ref<T>(&self) -> &Twhere T: JsCast,
source§impl LongRefFromWasmAbi for FileReader
impl LongRefFromWasmAbi for FileReader
§type Abi = <JsValue as LongRefFromWasmAbi>::Abi
type Abi = <JsValue as LongRefFromWasmAbi>::Abi
RefFromWasmAbi::Abi
§type Anchor = FileReader
type Anchor = FileReader
RefFromWasmAbi::Anchor
source§unsafe fn long_ref_from_abi(js: Self::Abi) -> Self::Anchor
unsafe fn long_ref_from_abi(js: Self::Abi) -> Self::Anchor
RefFromWasmAbi::ref_from_abi
source§impl OptionFromWasmAbi for FileReader
impl OptionFromWasmAbi for FileReader
source§impl<'a> OptionIntoWasmAbi for &'a FileReader
impl<'a> OptionIntoWasmAbi for &'a FileReader
source§impl OptionIntoWasmAbi for FileReader
impl OptionIntoWasmAbi for FileReader
source§impl PartialEq<FileReader> for FileReader
impl PartialEq<FileReader> for FileReader
source§fn eq(&self, other: &FileReader) -> bool
fn eq(&self, other: &FileReader) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl RefFromWasmAbi for FileReader
impl RefFromWasmAbi for FileReader
§type Abi = <JsValue as RefFromWasmAbi>::Abi
type Abi = <JsValue as RefFromWasmAbi>::Abi
Self
are recovered from.§type Anchor = ManuallyDrop<FileReader>
type Anchor = ManuallyDrop<FileReader>
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.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§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
source§impl<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
IntoWasmAbi::Abi
source§fn return_abi(self) -> <T as ReturnWasmAbi>::Abi
fn return_abi(self) -> <T as ReturnWasmAbi>::Abi
IntoWasmAbi::into_abi
, except that it may throw and never
return in the case of Err
.