Download e-book for kindle: Advanced JavaScript by Chuck Easttom

By Chuck Easttom

ISBN-10: 1435611152

ISBN-13: 9781435611153

ISBN-10: 1598220330

ISBN-13: 9781598220339

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333E–1 (rounded off). 667E–1 (rounded off). 667E–1. Every computer has a similar problem with floating-point values. 2, for example, has no exact binary representation. For this reason, always round off your floating-point values before doing calculations in order to avoid these inaccuracies. Boolean Literals Boolean values, also called logical values, are basically true or false. They are usually used in conditional expressions and statements. If you are familiar with C++, you probably recognize these terms as 1 and 0, 1 representing true and 0 representing false.

Once layout is complete, the display of the page can change only if you reload the page. Even if the value of the JavaScript entity variable changes, the entity itself does not change until you reload the page. Unlike HTML character entities, which can be used in any script statement, JavaScript entities can be used only in a tag statement. Another difference is that, while HTML character entities may substitute for any HTML element, JavaScript entities are limited to HTML attribute substitution only.

Some commonly used event handlers include onMouseOver, onMouseOut, onLoad, onSubmit, and onClick. Like any other HTML tag attribute, event handlers belong inside an HTML tag, are followed by an equal sign, and contain their values in quotes. The difference is that the event handler’s value is JavaScript. gif'" > You will see event handlers used in this manner quite frequently. It is a very popular technique with JavaScript programmers. Short Statements Short statements are just like what you saw in event handlers.

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Advanced JavaScript by Chuck Easttom

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