Trait ExtractFromJs 

pub trait ExtractFromJs<'a>: Sized {
    // Required method
    fn extract(js_cb: &'a mut JsCallback) -> Result<Self, NjError>;

    // Provided method
    fn label() -> &'static str { ... }
}

#[deprecated(since = “4.1.0”,“No longer used”]

Required Methods

fn extract(js_cb: &'a mut JsCallback) -> Result<Self, NjError>

extract from js callback

Provided Methods

fn label() -> &'static str

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<'a, T> ExtractFromJs<'a> for Option<T>

where T: JSValue<'a>,

for optional argument

fn label() -> &'static str

fn extract(js_cb: &'a mut JsCallback) -> Result<Option<T>, NjError>

Implementors

impl ExtractFromJs<'_> for JsEnv

impl<'a, T> ExtractFromJs<'a> for T

where T: JSValue<'a>,