So, let’s get started. Declaring variables Nowadays JavaScript has three different keywords to declare a variable — var, let and, const. Each has its own properties and particularities.

All JavaScript programming happens in an environment like a web browser, Node, or Bun.js. Each of these environments has its own set of pre-defined variables like window and console.

JavaScript statements control the overall flow of JavaScript programs. Statements are used to declare variables and manage iterative processes, and they can also be used to declare classes and ...

These forms use HTML markup and optionally JavaScript functions. Your website may use URL variables, which allow you to pass data items as part of the URL for a particular page.