CasperJS
lastmod 2018-08-17created 2014-09-111 edits
avigation scripting & testing utility for PhantomJS and SlimerJS written in Javascript.
Introduction
PhantomJS is a Headless Webkit Utility that lets you control a WebPage freely without a browser and supports a Javascript API. Because its base structure uses QtWebkit, it can be used for many purposes related to DOM, CSS, Canvas, SVG, and more, besides running Javascript. Here, Headless means that there is no screen.
CasperJS is a Utility that wraps PhantomJS; it makes PhantomJS's detailed API usage easier, so you gain benefits in use. Developers can choose whichever suits them. In other words, PhantomJS and CasperJS serve the same purpose.