assert-args.js

import args from "assert-args";

// Annotate functions for argument warnings in non-production environments:
@args({ bar: String, baz: Function })
function foo(bar, baz) {
}

foo();
// Argument Warning: expected bar to be String, found undefined
// Argument Warning: expected baz to be Function, found undefined

foo(5, "pow");
// Argument Warning: expected bar to be String, found Number
// Argument Warning: expected baz to be Function, found String