A viewport is a rectangular viewing region in computer graphics, or a term used for optical components. It has several definitions in different contexts.A viewport is a region of the screen used to display a portion of the total image to be shown. Also it can be a group of regions that together make one layout.

fstream provides an iostream interface for file I/O in C++.

Serverless Framework – Build and maintain web, mobile and IoT applications running on AWS, Google Cloud or Azure

Sinon is a mocking framework for JavaScript, which can create spies, stubs and mocks.

.gitignore is a file that lists files, directories, and/or path patterns that Git should not include as part of a repository.

Binary search is an efficient algorithm for finding an element in a sorted array. The basic idea is to cut the search space in half in each step. The complexity of the algorithm is O(log(n)).

For anything related to A-Frame (aframe.io). A-Frame is a web framework for building virtual reality experiences. A-Frame lets us build scenes with HTML while having unlimited access to JavaScript, three.js, and all existing Web APIs. A-Frame is an entity-component-system framework that promotes composition and extensibility. With WebVR, most headsets/controllers can be used with A-Frame: Vive, Rift, Daydream, GearVR, Cardboard, or plain 2D mode.

Firebug was a Firefox extension, which allowed the debugging, editing, and monitoring of any website's CSS, HTML, DOM, JavaScript, network traffic and cookies. You should just use this tag in case the question is directly related to Firebug itself and not a website you are debugging with Firebug.

Breeze is a JavaScript library that helps manage data in a rich client application. You can query and save data as complex object graphs, and share these graphs across multiple screens of your JavaScript client.

p5.js is a JavaScript library that starts with the original goal of processing, to make coding accessible for artists, designers, educators, and beginners, and reinterprets this for today’s web.