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Internet Explorer 8 Beta 1: Better Ajax, CSS, DOM, and new features

Microsoft has put out an IE 8 Readiness Report that discusses everything. There is a TON of amazing stuff here. It also looks like they will be using the standards for most of this stuff, but we need to see more. E.g. is cross domain messaging using postMessage? But, having 6 connections per host and the like is huge:

Ajax Improvements

A white paper is here:

  1. AJAX Navigation enables users to navigate back and forth without leaving the AJAX application and could be used
    navigating a page without performing a traditional full navigation. This allows websites to trigger an update to browser components like the address bar by setting the window.location.hash value, firing an event to alert components in the page and even creating an entry in the travel log.
  2. DOM Storage is a simple-to-use method for storing and retrieving strings of key/value pair data. Data can be stored per tab instance for a session or persisted to the local machine. This allows pages to cache text on the machine which
    reduces the effect of network latencies by providing faster access to pre-cached data. Several innovative uses are possible. For example, use this in combination with the new network connectivity event to allow a page to cache data if it detects that the computer is offline.
  3. Connectivity events allow websites to check when the user is connected to the network and receive notification
    of connectivity changes.
  4. Six connections per host instead of two for broadband scenarios and a scriptable property allow for more improved performance by allowing parallelization of downloads in Internet Explorer 8. In addition, this increases functionality by ensuring a request is not blocked to a host if two connections already exist. Websites can optimize their  downloads based on a scriptable property.
  5. XMLHTTPRequest Enhancements include a timeout property that can be set to cancel the request if necessary, allowing developers to manage the request better.

Cross domain is here:

  • With Cross-domain Request (XDR), developers can create cross-site data aggregation scenarios. Similar to the XMLHttpRequest object but with a simpler programming model, this request, called XDomainRequest, is the easiest way to make anonymous requests to third-party sites that support XDR and opt in to making their data available across domains. Three lines of code will have you making basic cross-site requests. This will ensure data aggregation for public sites (such as blogs) will be simple, secure and fast.
  • Cross-document Messaging (XDM) APIs allow communication between documents from different domains through
    IFrames in a way that is easy, secure and standardized.


New Features

  • Activities are contextual menu options which quickly access a service from any Web page. Users typically copy and paste from one Web page to another. Internet Explorer 8 Activities make this common pattern easier to do.
  • WebSlices is a new feature for websites to connect to their users by subscribing to content directly within a webpage. WebSlices behave just like feeds where clients can subscribe to get updates and notify the user of changes.

And we also have other features such as less memory leaks!

Internet Explorer 8, IE8, Features, Ajax, CSS, DOM, Beta

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