const myRegistry = new Registry();
const myCounter = Counter.with({
  name: "my_counter",
  help: "a counter with custom registry",
  registry: [myRegistry],
});

const counter = Counter.with({
  name: "http_requests_total",
  help: "The total number of HTTP requests.",
  labels: ["method", "status"],
});
const totalGetCreate = counter.labels({
  method: "GET",
  status: "201",
});
totalGetCreate.inc();
totalGetCreate.inc(42);

const gauge = Gauge.with({
  name: "cpu_time_usage",
  help: "The CPU time usage.",
  labels: ["mode"],
});
const cpuIdle = gauge.labels({
  mode: "idle",
});
cpuIdle.set(0);
cpuIdle.inc();
cpuIdle.inc(42);
cpuIdle.dec();
cpuIdle.dec(3.14);

const histogram = Histogram.with({
  name: "http_requests_duration",
  help: "A histogram of the requests duration.",
  buckets: [.05, .1, .2, .5, 1, 3],
});
histogram.observe(.42);
histogram.observe(.58);

let summary = Summary.with({
  name: "http_response_size",
  help: "A summary of the response size.",
  quantiles: [.25, .5, .75, 1],
});
let values = [1, 1, 2, 3, 5, 8, 13, 21, 34, 55];
values.forEach((v) => summary.observe(v));

Summary.with({
  name: "http_response_size",
  help: "A summary of the response size.",
  quantiles: [.25, .5, .75, 1],
  maxAge: 1000, // milliseconds
  ageBuckets: 5, // number of observations
});