JavaScript equivalent to Guava's Preconditions?

Question

In Java, I check my preconditions using Google Guava:

public Port getPublishedPort(Port port) {
    checkArgument(port.isPublishedPort(), "Given port %s is not a published port.", port);

Is there an equivalent to this in JavaScript?

Answer 1

The Node.js Preconditions Library is billed as having a Guava-like API for precondition checks.

Support for Guava like Precondition error checking in Node.js

new InstanceValidator(port).checkArgument(
        "publishedPort", "Given port %s is not a published port.", [port]);

Answer 2

I authored Requirements.js. Usage looks like this:

import {requireThat} from "@cowwoc/requirements/es6/node/DefaultRequirements.js"

class Player
{
  constructor(name, age)
  {
    requireThat(name, "name").isNotNull().asString().length().isBetween(1, 30);
    requireThat(age, "age").asNumber().isBetween(18, 30);
  }
}

The primary focus is on the readability. Here is what the output looks like:

RangeError: age must be in range [18, 30).
Actual: 15

I welcome your feedback.