Trait JsArgs 

pub trait JsArgs {
    // Required method
    fn get_or_undefined(&self, index: usize) -> &JsValue;
}

A utility trait to make working with function arguments easier.

Required Methods

fn get_or_undefined(&self, index: usize) -> &JsValue

Utility function to get a parameter from a [JsValue] or default to JsValue::undefined() if get returns None.

Call this if you are thinking of calling something similar to args.get(n).cloned().unwrap_or_default() or args.get(n).unwrap_or(&undefined).

This returns a reference for efficiency, in case you only need to call methods of JsValue.

Dyn Compatibility

This trait is dyn compatible.

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

Implementations on Foreign Types

impl JsArgs for [JsValue]

fn get_or_undefined(&self, index: usize) -> &JsValue

Implementors