JavaScript variables hold a wide variety of information and can be used with virtually any data type. Here's how to use variables to store numbers, text strings, objects, and more.

On August 1, npm Inc. — the company that runs the biggest JavaScript package repository — removed 38 JavaScript npm packages that were caught stealing environment variables from infected projects.

Scope in JavaScript refers to context (or portion) of the code which determines the accessibility (visibility) of variables. In JavaScript, we have two types of scope, local , and global.

Survey your options for in-browser data storage with JavaScript, including built-in variables, localStorage, IndexedDB, and the service worker cache API.