Javascript versions3/29/2023 On the server, you also embed JavaScript in HTML pages. For information on JavaScript and Navigator versions, see "JavaScript Versions" on page 16. Some features available in JavaScript 1.2 are not available in JavaScript 1.1 and hence are not available in Navigator 3.0. For example, JavaScript 1.2 is for Navigator 4.0. Without any network transmission, the embedded JavaScript on the HTML page can check the entered data and display a dialog box if the user enters invalid data.ĭifferent versions of JavaScript work with specific versions of Navigator. For example, you can write a JavaScript function to verify that users enter valid information into a form requesting a telephone number or zip code. This process, illustrated in the following figure, produces the results that the user sees.Ĭlient-side JavaScript statements embedded in an HTML page can respond to user events such as mouse clicks, form input, and page navigation. The browser reads the page from top to bottom, displaying the results of the HTML and executing JavaScript statements as they are encountered. When the browser (or client) requests such a page, the server sends the full content of the document, including HTML and JavaScript statements, over the network to the client. Web browsers such as Navigator (2.0 and later versions) can interpret client-side JavaScript statements embedded in an HTML page. Predefined objects and functions, such as such as Array, Date, and Math Underlying object model (although client-side and server-side JavaScript have different sets of predefined objects) Rules for expressions, variables, and literals The following sections introduce the workings of JavaScript on the client and on the server.Ĭlient-side and server-side JavaScript have the following elements in common: The components of JavaScript are illustrated in the following figure. Netscape invented JavaScript, and JavaScript was first used in Netscape browsers.Ĭore, Client-Side, and Server-Side JavaScript From Java, you can access JavaScript objects, properties, and methods. From JavaScript, you can instantiate Java objects and access their public methods and fields. Through JavaScript's LiveConnect functionality, you can let Java and JavaScript code communicate with each other. Using JavaScript, you can create dynamic HTML pages that process user input and maintain persistent data using special objects, files, and relational databases. Client applications run in a browser, such as Netscape Navigator, and server applications run on a server, such as Netscape Enterprise Server. JavaScript lets you create applications that run over the Internet. For example, server-side extensions allow an application to communicate with a relational database, provide continuity of information from one invocation to another of the application, or perform file manipulations on a server. Server-side JavaScript extends the core language by supplying objects relevant to running JavaScript on a server.For example, client-side extensions allow an application to place elements on an HTML form and respond to user events such as mouse clicks, form input, and page navigation. Client-side JavaScript extends the core language by supplying objects to control a browser (Navigator or another web browser) and its Document Object Model (DOM).Core JavaScript can be extended for a variety of purposes by supplementing it with additional objects for example: Core JavaScript contains a core set of objects, such as Array, Date, and Math, and a core set of language elements such as operators, control structures, and statements. JavaScript is Netscape's cross-platform, object-oriented scripting language. Core, Client-Side, and Server-Side JavaScript.This chapter contains the following sections: Probably not useful but answers the question.This chapter introduces JavaScript and discusses some of its fundamental concepts. I decided to write a script based on the previous answers that gives you the language version inside the browser via binary search.
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