Struct HtmlOptionsCollection 

pub struct HtmlOptionsCollection { /* private fields */ }

The HtmlOptionsCollection class.

MDN Documentation

This API requires the following crate features to be activated: HtmlOptionsCollection

Implementations

impl HtmlOptionsCollection

pub fn length(&self) -> u32

Getter for the length field of this object.

MDN Documentation

This API requires the following crate features to be activated: HtmlOptionsCollection

impl HtmlOptionsCollection

pub fn set_length(&self, value: u32)

Setter for the length field of this object.

MDN Documentation

This API requires the following crate features to be activated: HtmlOptionsCollection

impl HtmlOptionsCollection

pub fn selected_index(&self) -> Result<i32, JsValue>

Getter for the selectedIndex field of this object.

MDN Documentation

This API requires the following crate features to be activated: HtmlOptionsCollection

impl HtmlOptionsCollection

pub fn set_selected_index(&self, value: i32) -> Result<(), JsValue>

Setter for the selectedIndex field of this object.

MDN Documentation

This API requires the following crate features to be activated: HtmlOptionsCollection

impl HtmlOptionsCollection

pub fn add_with_html_option_element( &self, element: &HtmlOptionElement, ) -> Result<(), JsValue>

The add() method.

MDN Documentation

This API requires the following crate features to be activated: HtmlOptionElement, HtmlOptionsCollection

impl HtmlOptionsCollection

pub fn add_with_html_opt_group_element( &self, element: &HtmlOptGroupElement, ) -> Result<(), JsValue>

The add() method.

MDN Documentation

This API requires the following crate features to be activated: HtmlOptGroupElement, HtmlOptionsCollection

impl HtmlOptionsCollection

pub fn add_with_html_option_element_and_opt_html_element( &self, element: &HtmlOptionElement, before: Option<&HtmlElement>, ) -> Result<(), JsValue>

The add() method.

MDN Documentation

This API requires the following crate features to be activated: HtmlElement, HtmlOptionElement, HtmlOptionsCollection

impl HtmlOptionsCollection

pub fn add_with_html_opt_group_element_and_opt_html_element( &self, element: &HtmlOptGroupElement, before: Option<&HtmlElement>, ) -> Result<(), JsValue>

The add() method.

MDN Documentation

This API requires the following crate features to be activated: HtmlElement, HtmlOptGroupElement, HtmlOptionsCollection

impl HtmlOptionsCollection

pub fn add_with_html_option_element_and_opt_i32( &self, element: &HtmlOptionElement, before: Option<i32>, ) -> Result<(), JsValue>

The add() method.

MDN Documentation

This API requires the following crate features to be activated: HtmlOptionElement, HtmlOptionsCollection

impl HtmlOptionsCollection

pub fn add_with_html_opt_group_element_and_opt_i32( &self, element: &HtmlOptGroupElement, before: Option<i32>, ) -> Result<(), JsValue>

The add() method.

MDN Documentation

This API requires the following crate features to be activated: HtmlOptGroupElement, HtmlOptionsCollection

impl HtmlOptionsCollection

pub fn remove(&self, index: i32) -> Result<(), JsValue>

The remove() method.

MDN Documentation

This API requires the following crate features to be activated: HtmlOptionsCollection

impl HtmlOptionsCollection

pub fn set( &self, index: u32, option: Option<&HtmlOptionElement>, ) -> Result<(), JsValue>

Indexing setter. As in the literal Javascript this[key] = value.

This API requires the following crate features to be activated: HtmlOptionElement, HtmlOptionsCollection

Methods from Deref<Target = HtmlCollection>

pub fn length(&self) -> u32

Getter for the length field of this object.

MDN Documentation

This API requires the following crate features to be activated: HtmlCollection

pub fn item(&self, index: u32) -> Option<Element>

The item() method.

MDN Documentation

This API requires the following crate features to be activated: Element, HtmlCollection

pub fn named_item(&self, name: &str) -> Option<Element>

The namedItem() method.

MDN Documentation

This API requires the following crate features to be activated: Element, HtmlCollection

pub fn get_with_index(&self, index: u32) -> Option<Element>

Indexing getter. As in the literal Javascript this[key].

This API requires the following crate features to be activated: Element, HtmlCollection

pub fn get_with_name(&self, name: &str) -> Option<Element>

Indexing getter. As in the literal Javascript this[key].

This API requires the following crate features to be activated: Element, HtmlCollection

Methods from Deref<Target = Object>

pub fn constructor(&self) -> Function

The constructor property returns a reference to the Object constructor function that created the instance object.

MDN documentation

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).

MDN documentation

pub fn is_prototype_of(&self, value: &JsValue) -> bool

The isPrototypeOf() method checks if an object exists in another object’s prototype chain.

MDN documentation

pub fn property_is_enumerable(&self, property: &JsValue) -> bool

The propertyIsEnumerable() method returns a Boolean indicating whether the specified property is enumerable.

MDN documentation

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.

MDN documentation

pub fn to_string(&self) -> JsString

The toString() method returns a string representing the object.

MDN documentation

pub fn value_of(&self) -> Object

The valueOf() method returns the primitive value of the specified object.

MDN documentation

Methods from Deref<Target = JsValue>

pub const NULL: JsValue

pub const UNDEFINED: JsValue

pub const TRUE: JsValue

pub const FALSE: JsValue

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.

pub fn is_string(&self) -> bool

Tests whether this JS value is a JS 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.

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.

pub fn is_null(&self) -> bool

Tests whether this JS value is null

pub fn is_undefined(&self) -> bool

Tests whether this JS value is undefined

pub fn is_symbol(&self) -> bool

Tests whether the type of this JS value is symbol

pub fn is_object(&self) -> bool

Tests whether typeof self == "object" && self !== null.

pub fn is_array(&self) -> bool

Tests whether this JS value is an instance of Array.

pub fn is_function(&self) -> bool

Tests whether the type of this JS value is function.

pub fn is_bigint(&self) -> bool

Tests whether the type of this JS value is bigint.

pub fn js_typeof(&self) -> JsValue

Applies the unary typeof JS operator on a JsValue.

MDN documentation

pub fn js_in(&self, obj: &JsValue) -> bool

Applies the binary in JS operator on the two JsValues.

MDN documentation

pub fn is_truthy(&self) -> bool

Tests whether the value is “truthy”.

pub fn is_falsy(&self) -> bool

Tests whether the value is “falsy”.

pub fn loose_eq(&self, other: &JsValue) -> bool

Compare two JsValues for equality, using the == operator in JS.

MDN documentation

pub fn