Programming glossary

Short definitions that link back into Avora's visual guides and interactive classroom.

• HTML

  Markup language that describes the structure and meaning of a web page.

• DOM

  The live tree of elements the browser builds from HTML.

• Tag

  The angle-bracket markers that open or close an HTML element.

• Element

  A node in the HTML document: usually an opening tag, content, and a closing tag.

• Accessibility

  Designing pages so people with diverse abilities can perceive and use them.

• Variable

  A named container that holds a value in a program.

• Function

  A reusable block of code that performs a task when called.

• API

  A contract that lets programs talk to each other or to the browser.