How can I define an enum in JavaScript?
Enums are part of TypeScript, but what about defining enums in plain old JavaScript? Here are a few way you can do that.
JavaScript Object Articles
The JavaScript article collection contains a wide variety of ES6 helper functions. It includes helpers for dealing with primitives, arrays and objects, as well as algorithms, DOM manipulation functions and Node.js utilities.
-
JavaScript · -
JavaScript · Understanding the "this" keyword in JavaScript
JavaScript's
thiskeyword can confuse beginners and veterans alike. Learn how it works in different scenarios and start using it correctly. -
JavaScript · What are the differences between Maps and objects in JavaScript?
Maps and objects are very similar, but they have some differences that can help you decide which one better fits your use-case.
-
JavaScript · How do I compare two objects in JavaScript?
Learn how you can compare two objects in JavaScript using various different techniques.
-
JavaScript · An Introduction to JavaScript Proxy
A quick introduction to the JavaScript Proxy object and where it can be used.
-
JavaScript · Nest linked JavaScript objects
Learn how to recursively nest objects linked to one another in a flat array.
-
JavaScript · Map a JavaScript object to an array
Map an object to an object array, using the provided mapping function.
-
JavaScript · What is the difference between JavaScript's for...in, for...of and forEach?
Learn the differences between the three most commonly used iteration methods in JavaScript, that often confuse beginners and veterans alike.
-
JavaScript · Compact an array or object in JavaScript
Learn how to compact an array or object in JavaScript using the
Booleanfunction and recursion. -
JavaScript · Combine 2 JavaScript object arrays based on a key
Learn how to merge two arrays of objects, while combining objects based on a specified key.
-
JavaScript · Uppercase or lowercase object keys in JavaScript
Convert all the keys of an object to upper or lower case.
-
JavaScript · Find matching keys in a JavaScript object
Find all the keys in a JavaScript object that match the given value.
-
JavaScript · Invert the key-value pairs of a JavaScript object
Learn how to invert the key-value pairs of an object in JavaScript.
-
JavaScript · Filter a JavaScript object's properties by keys or values
Learn how to transform objects by filtering their properties based on an array of keys or a predicate function.
-
JavaScript · Can I create dynamic setters and getters in JavaScript?
Using the Proxy object, we can create dynamic getters and setters for objects in JavaScript.
-
JavaScript · Assign default values for a JavaScript object's properties
Assign default values for all properties in an object that are
undefined. -
JavaScript · Serialize specific properties from a JSON object
Have you ever wanted to serialize an object but only include certain keys? Turns out JavaScript provides an easy way to do this!
-
JavaScript · Group array elements based on a function
Group the elements of an array based on the given function, producing an object with the grouped values.
-
JavaScript · Iterate over a JavaScript object's own properties
Iterate over all own properties of an object, running a callback for each one.
-
JavaScript · Chaining dynamic getters using the Proxy object
Using the Proxy object, we can create chainable dynamic getters for objects in JavaScript.
-
JavaScript · What does 'use strict' do and what are some of the key benefits to using it?
JavaScript's strict mode can make your code faster, cleaner and more secure.
-
JavaScript · Unwind a JavaScript object
Create an array of objects from an object and one of its array-valued properties.
-
JavaScript · Typechecking objects with Proxy in JavaScript
Learn how to type check objects at runtime using the powerful Proxy object in JavaScript.
-
JavaScript · Walk through a JavaScript object depth-first
Create a generator that walks through all the keys of a given object.