Struct JsUndefined

pub struct JsUndefined(/* private fields */);

The type of JavaScript undefined primitives.

Example

// Extract the console object:
let console: Handle<JsObject> = cx.global("console")?;

// The undefined value:
let undefined = cx.undefined();

// Call console.log(undefined):
console.method(&mut cx, "log")?.arg(undefined)?.exec()?;

Implementations

impl JsUndefined

pub fn new<'a, C: Context<'a>>(cx: &mut C) -> Handle<'a, JsUndefined>

Creates an undefined value.

Although this method can be called many times, all undefined values are indistinguishable.

See also: Context::undefined

Trait Implementations

impl Debug for JsUndefined

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Value for JsUndefined

fn to_string<'cx, C: Context<'cx>>(&self, cx: &mut C) -> JsResult<'cx, JsString>

fn as_value<'cx, C: Context<'cx>>(&self, _: &mut C) -> Handle<'cx, JsValue>

fn to_raw(&self) -> Value

Available on crate feature sys only.

Get a raw reference to the wrapped Node-API value.

unsafe fn from_raw<'cx, C: Context<'cx>>( cx: &C, value: Value, ) -> Handle<'cx, Self>

Available on crate feature sys only.

Creates a value from a raw Node-API value.