Tham khảo sách 'javascript bible_ chapter 36', công nghệ thông tin, kỹ thuật lập trình phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Server-side JavaScript Most of this book is devoted to client-side JavaScript the scripts that execute when their documents are loaded in a browser. But the JavaScript language originally came into existence under its old name LiveScript as a server-side scripting language. Both client-side and serverside JavaScript share a common core language encompassing such items as how to use variables control structures data types and the rest. Where the two scripting environments diverge is in their object models. Client-side JavaScript is concerned with objects that appear in documents serverside JavaScript is concerned with objects that govern the two-way connection between the user and server applications. The subject of server-side JavaScript is large enough to fill an entire book. My goal in this chapter is to introduce the concepts and objects of server-side JavaScript to those who are familiar with the client side of things. If you move on to create server-side applications with JavaScript this chapter should help you reorient yourself to the server way of thinking about applications. The flavor of server-side JavaScript covered in this chapter is that found in Netscape s SuiteSpot 3 server family. In particular the Enterprise Server 3 component is where most of the server-side JavaScript action occurs. This is where you can write scripts that act as go-betweens for the user and large server databases. Adding Server Processing to Documents A standard HTML page contains tags that instruct the browser about how to render the content of the page. As a page loads the browser interprets the tags and lays out the words form elements and images from the top of the document to the bottom. If the page contains a form you may want to capture the information entered or selected by the user. In This Chapter Where server-side JavaScript scripts go in documents The server-side object model Accessing databases through server-side JavaScript 738 Part III JavaScript Object and .
