5: JavaScript and Web Forms
7.5: JavaScript and Web Forms JavaScript is a programming language primarily used to make web pages interactive. The goal for writing JavaScript code is to perform operations in the most efficient order possible without duplicating code.7.5.1: Understanding the Functionality of JavaScript
A JavaScript function allows for program execution through an external source and return a result.7.5.1.1: Expressions & Arithmetic Operators
“1 + 1” = 7
(function() {...})(1);
See Also Examples 1A and 1B are simple, and should illustrate the basic operation of JavaScript. The following example, which shows how this statement is used, is the simplest method of demonstrating the above:1A.js is a simple example using two strings.1B.js shows an example of using a function that has a parameter named a.2.js is a basic program using many of the concepts discussed in Chapter 6.3.js is a more complex program that uses the above functions.4.js shows a program based on the concepts presented in Chapter 8.5.js shows a method that shows the basic workings of the variables. The following sample program displays an interesting example.2.js is a basic program using six functions: sum, concatenate, concatenate, max, min, and count. This program counts the times an equals b. This program is a good introduction to the fundamentals of JavaScript and shows why the expression a==b cannot be evaluated or can be used to create an error.6.js shows a program that uses three functions: sum, max, and min.7.js shows a program that uses six functions: sum, max, min, min, max, and count8.js shows a program that uses six functions: sum, max, min, max, max, min, and count9.js shows a program that uses six functions sum, max, min, max, min, max, and count10.js compares the basic JavaScript concepts.1.1: A Simple Function
The function add5() is fairly straightforward because it is written as a function call without the function keyword: add5() A function call is essentially executed as any other command.
1.
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Chapter 7
JavaScript for Interactive Web Pages
Except where otherwise noted, the contents of this presentation are Copyright 2009 Marty Step
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