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Trait boa_engine::builtins::JsArgs

source · [−]
pub trait JsArgs {
    fn get_or_undefined(&self, index: usize) -> &JsValue;
}

Required Methods

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, so try to minimize calling clone.

Implementations on Foreign Types

Implementors