*alternate* - allow redirecting queries to an alternate set of upstreams based on RCODE

recursor resolves domains using defined IP addresses or resolving other mapped domains using defined resolvers

*ebpf* - attach an eBPF XDP program to a specified interface.

*kubeforward* - dynamically updates DNS forwarders based on changes to a specified Kubernetes Service.

*debug* disables the automatic recovery upon a crash so that you'll get a nice stack trace.

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This chapter documents all of JavaScript's standard, built-in objects, including their methods and properties.

JavaScript is a prototype-based language — an object's behaviors are specified by its own properties and its prototype's properties. However, with the addition of classes, the creation of hierarchies of objects and the inheritance of properties and their values are much more in line with other object-oriented languages such as Java. In this section, we will demonstrate how objects can be created from classes.

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Classes are a template for creating objects. They encapsulate data with code to work on that data. Classes in JS are built on prototypes but also have some syntax and semantics that are unique to classes.