By Kris Hadlock
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Starting Node. js is your step by step consultant to studying all of the features of making maintainable Node. js functions. you will discover how Node. js is targeted on developing high-performing, highly-scalable web pages, and the way effortless it truly is to start. Many front-end devs usually paintings with HTML, CSS, personal home page, even WordPress, yet have not but received begun with Node.
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Ultimately, this would be unusable and could easily turn users away. The onreadystatechange event handler fires when the state of the request object changes and allows us to set a callback method to be triggered. 1, will be covered in Chapter 3, where we will cover all aspects of an Ajax response. This custom method will be called from the onResponse method to determine the ready state of the XHR before it handles parsing the response object. 3 with a definition for each. 3 A List of the readyState Values, with Translations and Definitions for Each readyState Values Translations 0 1 2 3 Uninitialized The object is not initialized with data.
The getResponseHeader method takes a header label as the parameter, which is used to get specific data from that header. getAllResponseHeaders(); 17 18 Chapter 2 The Request The getAllResponseHeaders method returns all the headers from the response, which varies depending on the server that is responding. 4 shows a sample of all the response headers available for an XML file on the Windows server where my website is currently running. 4 A list of available HTTP headers that can be retrieved by the getAllResponseHeaders method.
We will use the name of our function as our object name.
Ajax for Web Application Developers (Developer's Library) by Kris Hadlock