Difference: JSF is a Java framework for building Web applications, providing a component-centric approach to developing Java Web user interfaces, thereby simplifying development. JavaScript is an interpreted scripting language that is widely used in web application development and is often used to add a variety of dynamic functions to web pages.
The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.
What is JSF?
JavaServer Faces (JSF) is a new standard Java framework for building web applications. It simplifies development by providing a component-centric approach to developing Java Web user interfaces.
JSF has also aroused the interest of the majority of Java/Web developers. "Enterprise Developers" and Web Designers will find that JSF development can be as simple as dragging and dropping user interface (UI) components onto the page, while "System Developers" will find that the rich and robust JSF API provides them with unparalleled functionality and programming flexibility.
JSF also ensures greater maintainability of the application by integrating the well-constructed Model-View-Controller (MVC) design pattern into its architecture.
Finally, because JSF is a Java standard developed through the Java Community Process (JCP), development tool vendors are fully capable of providing an easy-to-use, efficient visual development environment for JavaServer Faces.
What is JavaScript?
JavaScript ("JS" for short) is a lightweight, interpreted or just-in-time compiled programming language with function priority. Although it is famous as a scripting language for developing Web pages, it is also used in many non-browser environments. JavaScript is based on prototype programming, a multi-paradigm dynamic scripting language, and supports object-oriented, imperative, declarative, and functional programming paradigm.
JavaScript is a high-level scripting language that belongs to the Internet. It has been widely used in Web application development. It is often used to add various dynamic functions to web pages and provide users with smoother and more beautiful browsing effects. Usually JavaScript scripts realize their functions by embedding them in HTML.
JavaScript script language has the following characteristics:
Script language. JavaScript is an interpreted scripting language. Languages such as C and C are compiled first and then executed, while JavaScript is interpreted line by line during the running of the program.
Object based. JavaScript is an object-based scripting language that can not only create objects but also use existing objects.
Simple. The JavaScript language uses weakly typed variable types and does not impose strict requirements on the data types used. It is a scripting language based on Java's basic statements and controls, and its design is simple and compact.
Dynamic. JavaScript is an event-driven scripting language that can respond to user input without going through a Web server. When visiting a web page, JavaScript can directly respond to these events when the mouse is clicked, moved up or down, or moved in the window.
Cross-platform. The JavaScript scripting language does not depend on the operating system and only requires browser support. Therefore, after writing a JavaScript script, it can be brought to any machine for use, provided that the browser on the machine supports the JavaScript scripting language. JavaScript has been supported by most browsers. Unlike server-side scripting languages, such as PHP and ASP, JavaScript is mainly used as a client-side scripting language to run on the user's browser and does not require server support. Therefore, in the early days, programmers preferred JavaScript to reduce the burden on the server, but at the same time it also brought about another problem, security.
[Recommended learning: javascript advanced tutorial]
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