#[repr(transparent)]
pub struct KeyEvent { /* private fields */ }
Expand description

The KeyEvent class.

MDN Documentation

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

Implementations

The initKeyEvent() method.

MDN Documentation

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

The initKeyEvent() method.

MDN Documentation

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

The initKeyEvent() method.

MDN Documentation

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

The initKeyEvent() method.

MDN Documentation

This API requires the following crate features to be activated: KeyEvent, Window

The initKeyEvent() method.

MDN Documentation

This API requires the following crate features to be activated: KeyEvent, Window

The initKeyEvent() method.

MDN Documentation

This API requires the following crate features to be activated: KeyEvent, Window

The initKeyEvent() method.

MDN Documentation

This API requires the following crate features to be activated: KeyEvent, Window

The initKeyEvent() method.

MDN Documentation

This API requires the following crate features to be activated: KeyEvent, Window

The initKeyEvent() method.

MDN Documentation

This API requires the following crate features to be activated: KeyEvent, Window

The initKeyEvent() method.

MDN Documentation

This API requires the following crate features to be activated: KeyEvent, Window

The KeyEvent.DOM_VK_CANCEL const.

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

The KeyEvent.DOM_VK_HELP const.

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

The KeyEvent.DOM_VK_BACK_SPACE const.

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

The KeyEvent.DOM_VK_TAB const.

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

The KeyEvent.DOM_VK_CLEAR const.

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

The KeyEvent.DOM_VK_RETURN const.

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

The KeyEvent.DOM_VK_SHIFT const.

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

The KeyEvent.DOM_VK_CONTROL const.

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

The KeyEvent.DOM_VK_ALT const.

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

The KeyEvent.DOM_VK_PAUSE const.

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

The KeyEvent.DOM_VK_CAPS_LOCK const.

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

The KeyEvent.DOM_VK_KANA const.

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

The KeyEvent.DOM_VK_HANGUL const.

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

The KeyEvent.DOM_VK_EISU const.

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

The KeyEvent.DOM_VK_JUNJA const.

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

The KeyEvent.DOM_VK_FINAL const.

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

The KeyEvent.DOM_VK_HANJA const.

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

The KeyEvent.DOM_VK_KANJI const.

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

The KeyEvent.DOM_VK_ESCAPE const.

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

The KeyEvent.DOM_VK_CONVERT const.

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

The KeyEvent.DOM_VK_NONCONVERT const.

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

The KeyEvent.DOM_VK_ACCEPT const.

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

The KeyEvent.DOM_VK_MODECHANGE const.

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

The KeyEvent.DOM_VK_SPACE const.

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

The KeyEvent.DOM_VK_PAGE_UP const.

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

The KeyEvent.DOM_VK_PAGE_DOWN const.

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

The KeyEvent.DOM_VK_END const.

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

The KeyEvent.DOM_VK_HOME const.

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

The KeyEvent.DOM_VK_LEFT const.

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

The KeyEvent.DOM_VK_UP const.

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

The KeyEvent.DOM_VK_RIGHT const.

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

The KeyEvent.DOM_VK_DOWN const.

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

The KeyEvent.DOM_VK_SELECT const.

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

The KeyEvent.DOM_VK_PRINT const.

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

The KeyEvent.DOM_VK_EXECUTE const.

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

The KeyEvent.DOM_VK_PRINTSCREEN const.

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

The KeyEvent.DOM_VK_INSERT const.

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

The KeyEvent.DOM_VK_DELETE const.

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

The KeyEvent.DOM_VK_0 const.

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

The KeyEvent.DOM_VK_1 const.

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

The KeyEvent.DOM_VK_2 const.

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

The KeyEvent.DOM_VK_3 const.

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

The KeyEvent.DOM_VK_4 const.

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

The KeyEvent.DOM_VK_5 const.

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

The KeyEvent.DOM_VK_6 const.

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

The KeyEvent.DOM_VK_7 const.

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

The KeyEvent.DOM_VK_8 const.

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

The KeyEvent.DOM_VK_9 const.

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

The KeyEvent.DOM_VK_COLON const.

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

The KeyEvent.DOM_VK_SEMICOLON const.

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

The KeyEvent.DOM_VK_LESS_THAN const.

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

The KeyEvent.DOM_VK_EQUALS const.

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

The KeyEvent.DOM_VK_GREATER_THAN const.

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

The KeyEvent.DOM_VK_QUESTION_MARK const.

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

The KeyEvent.DOM_VK_AT const.

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

The KeyEvent.DOM_VK_A const.

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

The KeyEvent.DOM_VK_B const.

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

The KeyEvent.DOM_VK_C const.

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

The KeyEvent.DOM_VK_D const.

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

The KeyEvent.DOM_VK_E const.

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

The KeyEvent.DOM_VK_F const.

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

The KeyEvent.DOM_VK_G const.

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

The KeyEvent.DOM_VK_H const.

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

The KeyEvent.DOM_VK_I const.

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

The KeyEvent.DOM_VK_J const.

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

The KeyEvent.DOM_VK_K const.

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

The KeyEvent.DOM_VK_L const.

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

The KeyEvent.DOM_VK_M const.

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

The KeyEvent.DOM_VK_N const.

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

The KeyEvent.DOM_VK_O const.

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

The KeyEvent.DOM_VK_P const.

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

The KeyEvent.DOM_VK_Q const.

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

The KeyEvent.DOM_VK_R const.

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

The KeyEvent.DOM_VK_S const.

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

The KeyEvent.DOM_VK_T const.

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

The KeyEvent.DOM_VK_U const.

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

The KeyEvent.DOM_VK_V const.

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

The KeyEvent.DOM_VK_W const.

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

The KeyEvent.DOM_VK_X const.

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

The KeyEvent.DOM_VK_Y const.

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

The KeyEvent.DOM_VK_Z const.

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

The KeyEvent.DOM_VK_WIN const.

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

The KeyEvent.DOM_VK_CONTEXT_MENU const.

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

The KeyEvent.DOM_VK_SLEEP const.

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

The KeyEvent.DOM_VK_NUMPAD0 const.

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

The KeyEvent.DOM_VK_NUMPAD1 const.

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

The KeyEvent.DOM_VK_NUMPAD2 const.

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

The KeyEvent.DOM_VK_NUMPAD3 const.

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

The KeyEvent.DOM_VK_NUMPAD4 const.

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

The KeyEvent.DOM_VK_NUMPAD5 const.

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

The KeyEvent.DOM_VK_NUMPAD6 const.

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

The KeyEvent.DOM_VK_NUMPAD7 const.

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

The KeyEvent.DOM_VK_NUMPAD8 const.

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

The KeyEvent.DOM_VK_NUMPAD9 const.

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

The KeyEvent.DOM_VK_MULTIPLY const.

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

The KeyEvent.DOM_VK_ADD const.

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

The KeyEvent.DOM_VK_SEPARATOR const.

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

The KeyEvent.DOM_VK_SUBTRACT const.

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

The KeyEvent.DOM_VK_DECIMAL const.

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

The KeyEvent.DOM_VK_DIVIDE const.

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

The KeyEvent.DOM_VK_F1 const.

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

The KeyEvent.DOM_VK_F2 const.

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

The KeyEvent.DOM_VK_F3 const.

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

The KeyEvent.DOM_VK_F4 const.

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

The KeyEvent.DOM_VK_F5 const.

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

The KeyEvent.DOM_VK_F6 const.

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

The KeyEvent.DOM_VK_F7 const.

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

The KeyEvent.DOM_VK_F8 const.

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

The KeyEvent.DOM_VK_F9 const.

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

The KeyEvent.DOM_VK_F10 const.

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

The KeyEvent.DOM_VK_F11 const.

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

The KeyEvent.DOM_VK_F12 const.

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

The KeyEvent.DOM_VK_F13 const.

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

The KeyEvent.DOM_VK_F14 const.

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

The KeyEvent.DOM_VK_F15 const.

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

The KeyEvent.DOM_VK_F16 const.

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

The KeyEvent.DOM_VK_F17 const.

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

The KeyEvent.DOM_VK_F18 const.

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

The KeyEvent.DOM_VK_F19 const.

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

The KeyEvent.DOM_VK_F20 const.

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

The KeyEvent.DOM_VK_F21 const.

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

The KeyEvent.DOM_VK_F22 const.

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

The KeyEvent.DOM_VK_F23 const.

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

The KeyEvent.DOM_VK_F24 const.

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

The KeyEvent.DOM_VK_NUM_LOCK const.

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

The KeyEvent.DOM_VK_SCROLL_LOCK const.

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

The KeyEvent.DOM_VK_WIN_OEM_FJ_JISHO const.

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

The KeyEvent.DOM_VK_WIN_OEM_FJ_MASSHOU const.

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

The KeyEvent.DOM_VK_WIN_OEM_FJ_TOUROKU const.

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

The KeyEvent.DOM_VK_WIN_OEM_FJ_LOYA const.

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

The KeyEvent.DOM_VK_WIN_OEM_FJ_ROYA const.

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

The KeyEvent.DOM_VK_CIRCUMFLEX const.

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

The KeyEvent.DOM_VK_EXCLAMATION const.

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

The KeyEvent.DOM_VK_DOUBLE_QUOTE const.

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

The KeyEvent.DOM_VK_HASH const.

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

The KeyEvent.DOM_VK_DOLLAR const.

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

The KeyEvent.DOM_VK_PERCENT const.

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

The KeyEvent.DOM_VK_AMPERSAND const.

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

The KeyEvent.DOM_VK_UNDERSCORE const.

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

The KeyEvent.DOM_VK_OPEN_PAREN const.

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

The KeyEvent.DOM_VK_CLOSE_PAREN const.

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

The KeyEvent.DOM_VK_ASTERISK const.

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

The KeyEvent.DOM_VK_PLUS const.

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

The KeyEvent.DOM_VK_PIPE const.

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

The KeyEvent.DOM_VK_HYPHEN_MINUS const.

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

The KeyEvent.DOM_VK_OPEN_CURLY_BRACKET const.

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

The KeyEvent.DOM_VK_CLOSE_CURLY_BRACKET const.

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

The KeyEvent.DOM_VK_TILDE const.

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

The KeyEvent.DOM_VK_VOLUME_MUTE const.

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

The KeyEvent.DOM_VK_VOLUME_DOWN const.

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

The KeyEvent.DOM_VK_VOLUME_UP const.

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

The KeyEvent.DOM_VK_COMMA const.

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

The KeyEvent.DOM_VK_PERIOD const.

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

The KeyEvent.DOM_VK_SLASH const.

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

The KeyEvent.DOM_VK_BACK_QUOTE const.

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

The KeyEvent.DOM_VK_OPEN_BRACKET const.

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

The KeyEvent.DOM_VK_BACK_SLASH const.

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

The KeyEvent.DOM_VK_CLOSE_BRACKET const.

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

The KeyEvent.DOM_VK_QUOTE const.

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

The KeyEvent.DOM_VK_META const.

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

The KeyEvent.DOM_VK_ALTGR const.

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

The KeyEvent.DOM_VK_WIN_ICO_HELP const.

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

The KeyEvent.DOM_VK_WIN_ICO_00 const.

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

The KeyEvent.DOM_VK_PROCESSKEY const.

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

The KeyEvent.DOM_VK_WIN_ICO_CLEAR const.

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

The KeyEvent.DOM_VK_WIN_OEM_RESET const.

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

The KeyEvent.DOM_VK_WIN_OEM_JUMP const.

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

The KeyEvent.DOM_VK_WIN_OEM_PA1 const.

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

The KeyEvent.DOM_VK_WIN_OEM_PA2 const.

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

The KeyEvent.DOM_VK_WIN_OEM_PA3 const.

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

The KeyEvent.DOM_VK_WIN_OEM_WSCTRL const.

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

The KeyEvent.DOM_VK_WIN_OEM_CUSEL const.

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

The KeyEvent.DOM_VK_WIN_OEM_ATTN const.

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

The KeyEvent.DOM_VK_WIN_OEM_FINISH const.

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

The KeyEvent.DOM_VK_WIN_OEM_COPY const.

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

The KeyEvent.DOM_VK_WIN_OEM_AUTO const.

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

The KeyEvent.DOM_VK_WIN_OEM_ENLW const.

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

The KeyEvent.DOM_VK_WIN_OEM_BACKTAB const.

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

The KeyEvent.DOM_VK_ATTN const.

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

The KeyEvent.DOM_VK_CRSEL const.

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

The KeyEvent.DOM_VK_EXSEL const.

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

The KeyEvent.DOM_VK_EREOF const.

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

The KeyEvent.DOM_VK_PLAY const.

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

The KeyEvent.DOM_VK_ZOOM const.

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

The KeyEvent.DOM_VK_PA1 const.

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

The KeyEvent.DOM_VK_WIN_OEM_CLEAR const.

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

Methods from Deref<Target = Object>

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

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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).

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

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

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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.

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

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

MDN documentation

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If this JS value is not an instance of a number then this returns None.

Tests whether this JS value is a JS 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.

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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.

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.

Tests whether this JS value is null

Tests whether this JS value is undefined

Tests whether the type of this JS value is symbol

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

Tests whether the type of this JS value is function.

Tests whether the type of this JS value is bigint.

Applies the unary typeof JS operator on a JsValue.

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Applies the binary in JS operator on the two JsValues.

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Tests whether the value is “truthy”.

Tests whether the value is “falsy”.

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

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Applies the unary ~ JS operator on a JsValue.

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Applies the binary >>> JS operator on the two JsValues.

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Applies the binary / JS operator on two JsValues, catching and returning any RangeError thrown.

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Applies the binary ** JS operator on the two JsValues.

MDN documentation

Applies the binary < JS operator on the two JsValues.

MDN documentation

Applies the binary <= JS operator on the two JsValues.

MDN documentation

Applies the binary >= JS operator on the two JsValues.

MDN documentation

Applies the binary > JS operator on the two JsValues.

MDN documentation

Applies the unary + JS operator on a JsValue. Can throw.

MDN documentation

Trait Implementations

Converts this type into a shared reference of the (usually inferred) input type.

Converts this type into a shared reference of the (usually inferred) input type.

Converts this type into a shared reference of the (usually inferred) input type.

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The resulting type after dereferencing.

Dereferences the value.

Converts to this type from the input type.

Converts to this type from the input type.

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Recover a Self from Self::Abi. Read more

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Convert self into Self::Abi so that it can be sent across the wasm ABI boundary. Read more

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Convert self into Self::Abi so that it can be sent across the wasm ABI boundary. Read more

Performs a dynamic instanceof check to see whether the JsValue provided is an instance of this type. Read more

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Test whether this JS value has a type T. Read more

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Test whether this JS value is an instance of the type T. Read more

Performs a dynamic check to see whether the JsValue provided is a value of this type. Read more

Tests whether the argument is a “none” instance. If so it will be deserialized as None, and otherwise it will be passed to FromWasmAbi. Read more

Returns an ABI instance indicating “none”, which JS will interpret as the None branch of this option. Read more

Returns an ABI instance indicating “none”, which JS will interpret as the None branch of this option. Read more

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

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Returns the argument unchanged.

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