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JavaScript : Basic Scripting
Objectives :-
At the end of this chapter you will be able
• Explain the differences between JavaScript and Java;
• Write HTML files using some basic JavaScript tags and objects.
Introduction
Web browsers were originally designed to interpret HTML with two primary to render documents
marked up in HTML to an acceptable level of quality, and, crucially, to be able to follow hyperlinks to resources.
As the Web grew, so did the demand for more sophisticated Web content. Among many other extensions, graphics, forms, and tables were added to the HTML standard. With the exception of forms, there is nothing in HTML that supports interaction with the user. Given the ubiquity of Web browsers, and the effort which millions of ordinary people have put into learning to use them, they provide an almost universal starting point for
interacting with complex systems, particularly commercial, Internet based systems. Hence the need for
sophisticated interaction facilities within Web browser.
The main means for providing interactivity within HTML documents is the JavaScript programming language.
HTML documents can include JavaScript programmes that are interpreted (i.e. run) by the Web browser displaying the Web document. In a real sense, JavaScript allows a Web document to interact with its environment — that is,
with the browser that is displaying it. Ultimately, it lets the Web document become more interactive, to the user's
benefit.
At the end of this chapter you will be able
• Explain the differences between JavaScript and Java;
• Write HTML files using some basic JavaScript tags and objects.
Introduction
Web browsers were originally designed to interpret HTML with two primary to render documents
marked up in HTML to an acceptable level of quality, and, crucially, to be able to follow hyperlinks to resources.
As the Web grew, so did the demand for more sophisticated Web content. Among many other extensions, graphics, forms, and tables were added to the HTML standard. With the exception of forms, there is nothing in HTML that supports interaction with the user. Given the ubiquity of Web browsers, and the effort which millions of ordinary people have put into learning to use them, they provide an almost universal starting point for
interacting with complex systems, particularly commercial, Internet based systems. Hence the need for
sophisticated interaction facilities within Web browser.
The main means for providing interactivity within HTML documents is the JavaScript programming language.
HTML documents can include JavaScript programmes that are interpreted (i.e. run) by the Web browser displaying the Web document. In a real sense, JavaScript allows a Web document to interact with its environment — that is,
with the browser that is displaying it. Ultimately, it lets the Web document become more interactive, to the user's
benefit.
Kindle Edition
Published May 25, 2021
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