dnscontrol/pkg/js/parse_tests/006-transforms.js

var REG = NewRegistrar("Third-Party","NONE");
var CF = NewDnsProvider("Cloudflare", "CLOUDFLAREAPI")

var TRANSFORM_INT = [
    {low: "0.0.0.0", high: "1.1.1.1", newBase: "2.2.2.2" }, 
    {low: "1.1.1.1", high: IP("2.2.2.2"), newBase: ["3.3.3.3","4.4.4.4",IP("5.5.5.5")]} ,
    {low: "1.1.1.1", high: IP("2.2.2.2"), newIP: ["3.3.3.3","4.4.4.4",IP("5.5.5.5")]} 
]

D("foo.com",REG,DnsProvider(CF),
    A("@","1.2.3.4",{transform: TRANSFORM_INT})
);