JavaScript demystified by Keogh, James Edward

By Keogh, James Edward

No matter if you haven't any programming event, you are going to discover ways to create dynamic, interactive web content with aid from this easy-to-use, self-teaching advisor. writer and programming teacher Jim Keogh covers the fundamentals of this top internet improvement language and explains the way to write cross-browser JavaScript courses very quickly

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A. 10 b. You lose. c. You win. d. 7 7. What does the && operator do? a. Evaluates true if expression on its left and right are both true b. Evaluates true if expression on its left or right is true c. Evaluates true if neither expression on its left or right is true d. Combines the expression on its right with the expression on its left 41 JavaScript Demystified 42 8. True or False: The ++ can be on either the right (c = a++) or left (c = ++a) side of an expression without having any effect on the expression.

Objects You learned about objects in Chapter 1. An object is a value. This means that a document is a value, and so are a window and a form. You’ll become very familiar with objects when you start using them in your JavaScript a bit later. Functions A function performs an action when you call the function in a JavaScript—such as when you called the alert() function to display a message on the screen in Chapter 1. Two kinds of functions are used in JavaScript: predefined functions and custom functions.

The next evaluation performed by the browser depends on whether the greater than or equal to operator or the less than or equal to operator is used. If the greater than or equal to operator is used, then the browser determines whether the value on the left side of the operator is greater than the value on the right side. If so, then the expression is true; otherwise, the expression is false. If the less than or equal to operator is used, then the browser determines whether the value on the left side of the operator is less than the value on the right side.

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