[−][src]Struct js_sys::Object
Methods
impl Object
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pub fn assign(target: &Object, source: &Object) -> Object
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The Object.assign() method is used to copy the values of all enumerable own properties from one or more source objects to a target object. It will return the target object.
impl Object
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pub fn assign2(target: &Object, source1: &Object, source2: &Object) -> Object
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The Object.assign() method is used to copy the values of all enumerable own properties from one or more source objects to a target object. It will return the target object.
impl Object
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pub fn assign3(
target: &Object,
source1: &Object,
source2: &Object,
source3: &Object
) -> Object
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target: &Object,
source1: &Object,
source2: &Object,
source3: &Object
) -> Object
The Object.assign() method is used to copy the values of all enumerable own properties from one or more source objects to a target object. It will return the target object.
impl Object
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pub fn constructor(&self) -> Function
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The constructor property returns a reference to the Object constructor function that created the instance object.
impl Object
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pub fn create(prototype: &Object) -> Object
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The Object.create() method creates a new object, using an existing object to provide the newly created object's prototype.
impl Object
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pub fn define_property(
obj: &Object,
prop: &JsValue,
descriptor: &Object
) -> Object
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obj: &Object,
prop: &JsValue,
descriptor: &Object
) -> Object
The static method Object.defineProperty() defines a new property directly on an object, or modifies an existing property on an object, and returns the object.
impl Object
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pub fn define_properties(obj: &Object, props: &Object) -> Object
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The Object.defineProperties() method defines new or modifies existing properties directly on an object, returning the object.
impl Object
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pub fn entries(object: &Object) -> Array
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The Object.entries() method returns an array of a given object's own enumerable property [key, value] pairs, in the same order as that provided by a for...in loop (the difference being that a for-in loop enumerates properties in the prototype chain as well).
impl Object
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pub fn freeze(value: &Object) -> Object
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The Object.freeze()
method freezes an object: that is, prevents new
properties from being added to it; prevents existing properties from
being removed; and prevents existing properties, or their enumerability,
configurability, or writability, from being changed, it also prevents
the prototype from being changed. The method returns the passed object.
impl Object
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pub fn from_entries(iterable: &JsValue) -> Result<Object, JsValue>
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The Object.fromEntries() method transforms a list of key-value pairs into an object.
impl Object
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pub fn get_own_property_descriptor(obj: &Object, prop: &JsValue) -> JsValue
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The Object.getOwnPropertyDescriptor() method returns a property descriptor for an own property (that is, one directly present on an object and not in the object's prototype chain) of a given object.
impl Object
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pub fn get_own_property_descriptors(obj: &Object) -> JsValue
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The Object.getOwnPropertyDescriptors() method returns all own property descriptors of a given object.
impl Object
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pub fn get_own_property_names(obj: &Object) -> Array
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The Object.getOwnPropertyNames() method returns an array of all properties (including non-enumerable properties except for those which use Symbol) found directly upon a given object.
impl Object
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pub fn get_own_property_symbols(obj: &Object) -> Array
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The Object.getOwnPropertySymbols() method returns an array of all symbol properties found directly upon a given object.
impl Object
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pub fn get_prototype_of(obj: &JsValue) -> Object
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The Object.getPrototypeOf() method returns the prototype (i.e. the value of the internal [[Prototype]] property) of the specified object.
impl Object
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pub fn has_own_property(&self, property: &JsValue) -> bool
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The hasOwnProperty()
method returns a boolean indicating whether the
object has the specified property as its own property (as opposed to
inheriting it).
impl Object
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pub fn is(value_1: &JsValue, value_2: &JsValue) -> bool
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The Object.is() method determines whether two values are the same value.
impl Object
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pub fn is_extensible(object: &Object) -> bool
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The Object.isExtensible()
method determines if an object is extensible
(whether it can have new properties added to it).
impl Object
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pub fn is_frozen(object: &Object) -> bool
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The Object.isFrozen()
determines if an object is frozen.
impl Object
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pub fn is_sealed(object: &Object) -> bool
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The Object.isSealed()
method determines if an object is sealed.
impl Object
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pub fn is_prototype_of(&self, value: &JsValue) -> bool
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The isPrototypeOf()
method checks if an object exists in another
object's prototype chain.
impl Object
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pub fn keys(object: &Object) -> Array
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The Object.keys()
method returns an array of a given object's property
names, in the same order as we get with a normal loop.
impl Object
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impl Object
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pub fn prevent_extensions(object: &Object)
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The Object.preventExtensions()
method prevents new properties from
ever being added to an object (i.e. prevents future extensions to the
object).
impl Object
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pub fn property_is_enumerable(&self, property: &JsValue) -> bool
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The propertyIsEnumerable()
method returns a Boolean indicating
whether the specified property is enumerable.
impl Object
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pub fn seal(value: &Object) -> Object
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The Object.seal()
method seals an object, preventing new properties
from being added to it and marking all existing properties as
non-configurable. Values of present properties can still be changed as
long as they are writable.
impl Object
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pub fn set_prototype_of(object: &Object, prototype: &Object) -> Object
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The Object.setPrototypeOf()
method sets the prototype (i.e., the
internal [[Prototype]]
property) of a specified object to another
object or null
.
impl Object
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pub fn to_locale_string(&self) -> JsString
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The toLocaleString()
method returns a string representing the object.
This method is meant to be overridden by derived objects for
locale-specific purposes.
impl Object
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pub fn to_string(&self) -> JsString
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The toString()
method returns a string representing the object.
impl Object
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pub fn value_of(&self) -> Object
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The valueOf()
method returns the primitive value of the
specified object.
impl Object
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pub fn values(object: &Object) -> Array
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The Object.values()
method returns an array of a given object's own
enumerable property values, in the same order as that provided by a
for...in
loop (the difference being that a for-in loop enumerates
properties in the prototype chain as well).
impl Object
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pub fn try_from(val: &JsValue) -> Option<&Object>
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Returns the Object
value of this JS value if it's an instance of an
object.
If this JS value is not an instance of an object then this returns
None
.
Methods from Deref<Target = JsValue>
pub const NULL: JsValue
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pub const UNDEFINED: JsValue
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pub const TRUE: JsValue
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pub const FALSE: JsValue
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pub fn as_f64(&self) -> Option<f64>
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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
.
pub fn is_string(&self) -> bool
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Tests whether this JS value is a JS string.
pub fn as_string(&self) -> Option<String>
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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.
pub fn as_bool(&self) -> Option<bool>
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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
.
pub fn is_null(&self) -> bool
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Tests whether this JS value is null
pub fn is_undefined(&self) -> bool
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Tests whether this JS value is undefined
pub fn is_symbol(&self) -> bool
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Tests whether the type of this JS value is symbol
pub fn is_object(&self) -> bool
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Tests whether typeof self == "object" && self !== null
.
pub fn is_function(&self) -> bool
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Tests whether the type of this JS value is function
.
pub fn is_truthy(&self) -> bool
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Tests whether the value is "truthy".
pub fn is_falsy(&self) -> bool
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Tests whether the value is "falsy".
Trait Implementations
impl From<Array> for Object
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impl From<ArrayBuffer> for Object
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fn from(obj: ArrayBuffer) -> Object
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impl From<SharedArrayBuffer> for Object
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fn from(obj: SharedArrayBuffer) -> Object
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impl From<Boolean> for Object
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impl From<DataView> for Object
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impl From<Error> for Object
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impl From<EvalError> for Object
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impl From<Function> for Object
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impl From<Generator> for Object
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impl From<Map> for Object
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impl From<IteratorNext> for Object
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fn from(obj: IteratorNext) -> Object
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impl From<Number> for Object
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impl From<Date> for Object
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impl From<JsValue> for Object
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impl From<Object> for JsValue
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impl From<RangeError> for Object
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fn from(obj: RangeError) -> Object
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impl From<ReferenceError> for Object
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fn from(obj: ReferenceError) -> Object
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impl From<RegExp> for Object
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impl From<Set> for Object
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impl From<SyntaxError> for Object
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fn from(obj: SyntaxError) -> Object
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impl From<TypeError> for Object
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impl From<UriError> for Object
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impl From<WeakMap> for Object
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impl From<WeakSet> for Object
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impl From<Instance> for Object
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impl From<Module> for Object
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impl From<Table> for Object
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impl From<Memory> for Object
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impl From<JsString> for Object
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impl From<Collator> for Object
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impl From<DateTimeFormat> for Object
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fn from(obj: DateTimeFormat) -> Object
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impl From<NumberFormat> for Object
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fn from(obj: NumberFormat) -> Object
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impl From<PluralRules> for Object
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fn from(obj: PluralRules) -> Object
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impl From<Promise> for Object
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impl From<Int8Array> for Object
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impl From<Int16Array> for Object
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fn from(obj: Int16Array) -> Object
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impl From<Int32Array> for Object
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fn from(obj: Int32Array) -> Object
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impl From<Uint8Array> for Object
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fn from(obj: Uint8Array) -> Object
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impl From<Uint8ClampedArray> for Object
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fn from(obj: Uint8ClampedArray) -> Object
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impl From<Uint16Array> for Object
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fn from(obj: Uint16Array) -> Object
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impl From<Uint32Array> for Object
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fn from(obj: Uint32Array) -> Object
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impl From<Float32Array> for Object
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fn from(obj: Float32Array) -> Object
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impl From<Float64Array> for Object
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fn from(obj: Float64Array) -> Object
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impl Clone for Object
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fn clone(&self) -> Object
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fn clone_from(&mut self, source: &Self)
1.0.0[src]
Performs copy-assignment from source
. Read more
impl PartialEq<Object> for Object
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fn eq(&self, other: &Object) -> bool
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#[must_use]
fn ne(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests for !=
.
impl Eq for Object
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impl AsRef<Object> for Array
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impl AsRef<Object> for ArrayBuffer
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impl AsRef<Object> for SharedArrayBuffer
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impl AsRef<Object> for Boolean
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impl AsRef<Object> for DataView
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impl AsRef<Object> for Error
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impl AsRef<Object> for EvalError
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impl AsRef<Object> for Function
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impl AsRef<Object> for Generator
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impl AsRef<Object> for Map
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impl AsRef<Object> for IteratorNext
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impl AsRef<Object> for Number
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impl AsRef<Object> for Date
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impl AsRef<JsValue> for Object
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impl AsRef<Object> for Object
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impl AsRef<Object> for RangeError
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impl AsRef<Object> for ReferenceError
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impl AsRef<Object> for RegExp
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impl AsRef<Object> for Set
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impl AsRef<Object> for SyntaxError
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impl AsRef<Object> for TypeError
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impl AsRef<Object> for UriError
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impl AsRef<Object> for WeakMap
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impl AsRef<Object> for WeakSet
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impl AsRef<Object> for Instance
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impl AsRef<Object> for Module
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impl AsRef<Object> for Table
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impl AsRef<Object> for Memory
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impl AsRef<Object> for JsString
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impl AsRef<Object> for Collator
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impl AsRef<Object> for DateTimeFormat
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impl AsRef<Object> for NumberFormat
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impl AsRef<Object> for PluralRules
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impl AsRef<Object> for Promise
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impl AsRef<Object> for Int8Array
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impl AsRef<Object> for Int16Array
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impl AsRef<Object> for Int32Array
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impl AsRef<Object> for Uint8Array
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impl AsRef<Object> for Uint8ClampedArray
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impl AsRef<Object> for Uint16Array
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impl AsRef<Object> for Uint32Array
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impl AsRef<Object> for Float32Array
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impl AsRef<Object> for Float64Array
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impl Deref for Object
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impl Debug for Object
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impl RefFromWasmAbi for Object
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type Abi = <JsValue as RefFromWasmAbi>::Abi
The wasm ABI type references to Self
are recovered from.
type Anchor = ManuallyDrop<Object>
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
unsafe fn ref_from_abi(js: Self::Abi) -> Self::Anchor
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impl WasmDescribe for Object
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impl IntoWasmAbi for Object
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type Abi = <JsValue as IntoWasmAbi>::Abi
The wasm ABI type that this converts into when crossing the ABI boundary. Read more
fn into_abi(self) -> Self::Abi
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impl<'a> IntoWasmAbi for &'a Object
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type Abi = <&'a JsValue as IntoWasmAbi>::Abi
The wasm ABI type that this converts into when crossing the ABI boundary. Read more
fn into_abi(self) -> Self::Abi
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impl FromWasmAbi for Object
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type Abi = <JsValue as FromWasmAbi>::Abi
The wasm ABI type that this converts from when coming back out from the ABI boundary. Read more
unsafe fn from_abi(js: Self::Abi) -> Self
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impl OptionFromWasmAbi for Object
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impl OptionIntoWasmAbi for Object
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impl<'a> OptionIntoWasmAbi for &'a Object
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impl JsCast for Object
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fn instanceof(val: &JsValue) -> bool
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fn unchecked_from_js(val: JsValue) -> Self
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fn unchecked_from_js_ref(val: &JsValue) -> &Self
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fn has_type<T>(&self) -> bool where
T: JsCast,
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T: JsCast,
Test whether this JS value has a type T
. Read more
fn dyn_into<T>(self) -> Result<T, Self> where
T: JsCast,
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T: JsCast,
Performs a dynamic cast (checked at runtime) of this value into the target type T
. Read more
fn dyn_ref<T>(&self) -> Option<&T> where
T: JsCast,
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T: JsCast,
Performs a dynamic cast (checked at runtime) of this value into the target type T
. Read more
fn unchecked_into<T>(self) -> T where
T: JsCast,
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T: JsCast,
Performs a zero-cost unchecked cast into the specified type. Read more
fn unchecked_ref<T>(&self) -> &T where
T: JsCast,
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T: JsCast,
Performs a zero-cost unchecked cast into a reference to the specified type. Read more
fn is_instance_of<T>(&self) -> bool where
T: JsCast,
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T: JsCast,
Test whether this JS value is an instance of the type T
. Read more
fn is_type_of(val: &JsValue) -> bool
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Performs a dynamic check to see whether the JsValue
provided is a value of this type. Read more
Auto Trait Implementations
impl Unpin for Object
impl !Send for Object
impl !Sync for Object
impl RefUnwindSafe for Object
impl UnwindSafe for Object
Blanket Implementations
impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> ReturnWasmAbi for T where
T: IntoWasmAbi,
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T: IntoWasmAbi,
type Abi = <T as IntoWasmAbi>::Abi
Same as IntoWasmAbi::Abi