There is no definitive answer to when you should check if an object property is null, undefined, or exists, as it depends on the context and the purpose of your code.
Cloning an object is harder than you think as you have to handle reference types, circular references, functions, special objects, hidden properties.
JavaScript provides several approaches to achieve this, ranging from basic techniques to more advanced methods involving functions or regular expressions.
You can use global variables across multiple files by attaching them to the global object or by using a module system to import and export variables between files.
A binary number is a numeral system with a base of 2. It uses only two symbols, typically 0 and 1, to represent all values.
You can convert both strings to either lower case or upper case, use the localeCompare method of the String object, or regular expressions with the i flag.
Base64 works by dividing the input data into groups of three bytes (24 bits) and then converting each group into four characters from the 64-character alphabet.
Comparing dates in JavaScript is essential for tasks like event scheduling, data sorting, and ensuring chronological accuracy in web applications.
Leading zeros can introduce inconsistencies in data formatting, hinder mathematical operations, and affect how information is displayed to users.
Deep equality means that two values are equal if they have the same properties and values, regardless of whether they are the same object or not.