The try-catch Statement

JavaScript provides a try-catch statement that is capable of intercepting thrown errors
before they are handled by the browser. The code that might cause an error comes in
the try block and code that handles the error goes into the catch block. For instance:

try {
somethingThatMightCauseAnError();
} catch (ex) {
handleError(ex);
}

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Load from the Server-Ajax

The first is to keep the templates remote and use an XMLHttpRequest object to retrieve
additional markup. This approach is more convenient for single-page applications than
for multiple-page applications.

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JavaScript Object Literals

Object literals are a popular way to create new objects with a specific set of properties,
as opposed to explicitly creating a new instance of Object and then adding properties.
For example, this pattern is rarely used:

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JavaScript Refresh Page

you refresh the page using document.location.reload(). You can add the true keyword to force the reloaded page to come from the server (instead of cache). Alternatively, you can use the false keyword to reload the page from the cache.

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Creating Elements, Attributes, and Objects

An important benefit of dynamic content is the ability to create new content from
freshly received data. This is necessary in dynamic menu creation, navigation, breadcrumbs,

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W3C node types

Node type Numeric type value Description
Element - Represents an element.
Attribute - Represents an attribute.
Text-3 Represents character data in an element or attribute.

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Ajax Animations

An animated PNG image is only one of the embellishments you see in web applications
today. Most animations are created by manipulating elements on a page. Part
of developing an application on the Web with Ajax is making it a Web 2.0 application.

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