Mongoose 5.7.0 was released on September 9 and is packed with new features. One major highlight

JavaScript introduced symbols in ES6 as a way to prevent property name collisions. As an added bonus, symbols also provide a way to simulate private properties in 2015-2019 JavaScript.

The TC39 async iterators proposal that brought for/await/of to JavaScript also introduced the concept of an async generator function. Now, JavaScript has 6 distinct types of functions:

Puppeteer is Google's official npm module for controlling Chrome from Node.js. Using Puppeteer, you can open up a Chrome browser, navigate to an arbitrary page, and interact with the page by executing arbitrary JavaScript. Here's a short list of what you can do with Puppeteer:

Error handling in async/await causes a lot of confusion. There are

Async functions were introduced in the 2017 edition of the JavaScript language spec. Async functions differ from normal JavaScript functions in 2 major ways:

Mongoose 5.6.0 was released last week. This new release has 12 new features, 2 performance improvements, and several docs improvements. The most interesting new feature is immutable properties. The idea is that marking a property as immutable means that property cannot change after the document is created.

JavaScript arrays are an essential part of the language. Fundamentally, an array is a value that stores an ordered list of other values. But JavaScript arrays come with a lot of nuances and surprises. In this article, I'll provide an overview of what you need to know about JavaScript arrays.