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How to access object properties in JavaScript

Common pitfalls in JavaScript object property access include handling undefined vs null, prototype chain properties, shadowing, and truthy/falsy evaluations. Use hasOwnProperty and optional chaining to safely access properties and avoid errors when properties are missing or inherited.

Node.js Core

How to export multiple functions in a Node.js module

Node.js Coreexports, module.exports, node.js, object

Importing multiple functions from CommonJS modules involves requiring the exported object and destructuring needed functions for clarity and maintainability. Techniques include nested destructuring, aliasing imports, conditional requires, class imports, and re-exporting functions to simplify module consumption in Node.js.

Classes and Inheritance

How to create an instance of a class in JavaScript

Classes and Inheritanceclass, js classes, new, object

JavaScript classes offer syntax for prototype inheritance. Define a class with a constructor, methods, and use `extends` for inheritance. Includes static methods, getters, setters, and private fields (#). Manage `this` context with arrow functions and avoid pitfalls like hoisting and async constructors.

Objects and Prototypes

How to create an object in JavaScript

Objects and Prototypesjs objects, literal, object

In JavaScript, object literals provide a convenient way to create objects using a simple syntax.…

$How to use the Math object in JavaScript$

Standard Objects: Math

How to use the Math object in JavaScript

Standard Objects: Mathjs math, math, numbers, object

JavaScript Math functions: Math.max() & Math.min() on arrays using spread syntax to avoid NaN. Generate random integers in a range with Math.random(). Core functions: Math.abs(), Math.pow(), Math.sqrt(). Security warning: Math.random() is not cryptographically secure.