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.

A variable is a container in which we can store values for later retrieval. Imagine a box that can hold any type of data: a number, a string, etc. We take some data that we want to store, place it ...

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.

companyName — Inside the test/indexTest.js file, look at the describe function call for the companyName variable. The two it function calls inside this describe tell us the features of companyName we ...

The JavaScript executes within the larger context of the surrounding code— that’s why you can reference the variables. Now we start to see some of the power that has made JSX so successful.

In JavaScript, for example, you can assign a number to a variable named "x" as easily as you can assign the word "apple" to it. This flexibility allows you to create programs without worrying ...

Difference between TypeScript and JavaScript JavaScript and TypeScript look very similar, but there's one important distinction. The key difference between JavaScript and TypeScript is that JavaScript ...