The source code is passed through a program called a compiler, which translates it into bytecode that the machine understands and can execute. A program such as C++ or Java needs to be compiled before it is run. JavaScript is an interpreted language, not a compiled language. However, the inner workings of JavaScript is closer to a dynamically-typed, interpreted language such as Python or Ruby. If you have experience in C++ or Java, JavaScript’s syntax will seem familiar to you. JavaScript’s syntax is heavily inspired by C++ and Java. Today, browser scripting remains the main use-case of JavaScript. The language was created to allow web developers to embed executable code on their webpages, so that they could make their webpages interactive, or perform simple tasks. A webpage can contain embedded JavaScript, which executes when a user visits the page. JavaScript started at Netscape, a web browser developed in the 1990s. What is JavaScript? JavaScript is primarily a client-side language. If you have any previous experience developing web applications, the first part of the course may be too basic for you, but if you stick around, we will cover some advanced JavaScript language concepts, as well as some useful libraries. Understanding of HTML and CSS is helpful but not necessary, as we will review HTML and CSS later. This class is not intended for fist-time programmers: a more appropriate class would be CS105 or CS106A. You should be comfortable coding in at least one other programming language. Become familiar with common JavaScript libraries and tools that are used in web application development.Īre you in the right class? You need to have taken one of CS106A or CS106B.Understand advanced JavaScript features such as prototypical inheritence.Understand concepts commonly used in dynamic language programming, such as introspection, higher-order functions, and closures.Learn to use best-practice idioms and patterns.
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