Client-side development 1 - jQuery a library - a collection of functions which are useful when writing web apps . Your code is in charge and it calls into the library when it sees fit . E . g . , jQuery . A framework is something that usually forces a certain way of implementing a solution, whereas jQuery is just a tool to make implementing what you want to do easier. jQuery: The Write Less, Do More, JavaScript Library. For sure, it's a JavaScript library. ... And jQuery is just a single library Then jQuery is not a framework. frameworks - a particular implementation of a web application, where your code fills in the details . ...