Ajax

INTRODUCTION ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Ajax.Request ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],<<Back

Ajax.Responders ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],<<Back

Ajax.Updater ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],By default, Element.update is used, which replaces the whole contents of the container with the response text. You may want to instead insert the response text around existing contents. You just need to pass a valid Insertion object for this, such as Insertion.Bottom . None insertion This determines whether <script> elements in the response text are left in (and therefore evaluated by the browser) or not. false evalScripts Description Default Option

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],<<Back

Ajax Options ,[object Object],The HTTP method to use for the request. The other widespread possibility is 'get'. As a Ruby On Rails special, Prototype also reacts to other verbs (such as 'put' and 'delete' by actually using 'post' and putting an extra '_method' parameter with the originally requested method in there. 'post' method The encoding for your request contents. It is best left as is, but should weird encoding issues arise, you may have to tweak it in accordance with other encoding-related parts of your page code and server side. 'UTF-8' encoding The Content-Type header for your request. You might want to send XML instead of the regular URL-encoded format, in which case you would have to change this. 'application/x-www-form-urlencoded' contentType Determines whether XMLHttpRequest is used asynchronously or not. Since synchronous usage is rather unsettling, and usually bad taste, you should avoid changing this. Seriously. TRUE asynchronous Description Default Option

[object Object],Request headers can be passed under two forms: · As an object, with properties representing headers. · As an array, with even-index (0, 2…) elements being header names, and odd-index (1, 3…) elements being values. Prototype automatically provides a set of default headers, that this option can override and augment: · X-Requested-With is set to 'XMLHttpRequest'. · X-Prototype-Version provides Prototype's current version (e.g. 1.5.0). · Accept defaults to 'text/javascript, text/html, application/xml, text/xml, */*' · Content-type is built based on the contentType and encoding options. See text requestHeaders Specific contents for the request body on a 'post' method (actual method, after possible conversion as described in the method opt ion above). If it is not provided, the contents of the parameters option will be used instead. None postBody The parameters for the request, which will be encoded into the URL for a 'get' method, or into the request body for the other methods. This can be provided either as a URL-encoded string or as any Hash-compatible object (basically anything), with properties representing parameters. ‘ ‘ parameters Description Default Option

[object Object],[object Object],[object Object],With XYZ being an HTTP status code for the response. Invoked when the response just completed, and the status code is exactly the one we used in t he callback name. Prevents execution of onSuccess / onFailure . Happens before onComplete . onXYZ (Not guaranteed) Invoked when the XHR object was just created. onUninitialized Invoked when a request completes and its status code is undefined or belongs in the 2xy family. This is skipped if a code-specific callback is defined, and happens before onComplete . onSuccess (Not guaranteed) Triggered when the underlying XHR object is being setup, and its connection opened. onLoading (Not guaranteed) Triggered once the underlying XHR object is setup, the connection open, and ready to send its actual request. onLoaded (Not guaranteed) Triggered whenever the requester receives a part of the response (but not the final part), should it be sent in several packets. onInteractive Invoked when a request completes and its status code exists but is not in the 2xy family. This is skipped if a code-specific callback is defined, and happens before onComplete . onFailure Triggered whenever an XHR error arises. Has a custom signature: the first argument is the requester (e.g. an Ajax.Request instance), the second is the exception object. onException Triggered at the very end of a request's life-cycle, once the request completed, status-specific callbacks were called, and possible automatic behaviors were processed. onComplete Description Option

[object Object],[object Object],[object Object],[object Object],<<Back Triggered whenever a requester object from the Ajax namespace is created, after its parameters where adjusted and its before its XHR connection is opened. This takes two arguments: the requester object and the underlying XHR object. onCreate Description Option

Ajax.PeriodicalUpdater ,[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],This controls the rate at which the request interval grows when the response is unchanged. It is used as a multiplier on the current period (which starts at the original value of the frequency parameter). Every time a request returns an unchanged response text, the current period is multiplied by the decay. Therefore, the default value means regular requests (no change of interval). Values higher than one will yield growing intervals. Values below one are dangerous: the longer the response text stays the same, the more often you’ll check, until the interval is so short your browser is left with no other choice than suicide. Note that, as soon as the response text does change, the current period resets to the original one. 1 decay Okay, this is not a frequency (e.g 0.5Hz), but a period (i.e. a number of seconds). This is the minimum interval at which AJAX requests are made. You don’t want to make it too short (otherwise you may very well end up with multiple requests in parallel, if they take longer to process and return), but you technically can provide a number below one, e.g. 0.75 second. 2 frequency Description Default Option

[object Object],[object Object],[object Object],Ah, finally! Resetting decay to 1, and therefore using the original period. 3 1 yes 8 0:48 6 is this thing going to change or what? 24 8 no 4 0:24 5 Still no change, doubling again. 12 4 no 2 0:12 4 Response didn’t change: decay augments by the decay option factor: we’re waiting longer now… 6 3 no 1 0:06 3 Response did change again: we “reset” to 1, which was already the decay. 3 1 yes 1 0:03 2 Response is deemed changed, since there is no prior response to compare to! 3 1 n/a 2 0:00 1 Comments Next period Decay after Response changed? Decay before When? Call#

Ajax

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Ajax