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Feb 03

XmlHttpRequest and company enable componentization

Ajax, HTML, JavaScript, Tech, UI / UX Add comments

I am really excited about XmlHttpRequest being available in the major browsers.

One of the main reasons is that I think it really enables componentization.

Take the example of a portal, with 10 components on the screen. In the past the web application would have to round-trip to the server, and rerender everything. What a waste of time!

Now, with XHR, each component can talk back to the server if it needs too, and the rest of the page stays put.

Ok, more efficient, but is it that big a deal?

I think it is. The real power comes in when you think about having plugged in those 10 components from DIFFERENT SOURCES. That works just fine now, whereas it would be a real PITA as the portal software would have to coordinate everything in the past. Now, each component truly is its own component, and our clients talk directly to its server-side representation.

I expect to see a lot more ideas such as Y!Q, that make use of this.

44 Responses to “XmlHttpRequest and company enable componentization”

  1. Matt Says:

    A servicable client-side include mechanism would be (IMHO) a more ideal solution. A good implemenation of <object> or <iframe>

  2. Matt Says:

    A servicable client-side include mechanism would be (IMHO) a more ideal solution. A good implemenation of <object> or <iframe>

  3. Scott McClure Says:

    Actually, there are lots of restrictions on what host you can load data from. If it is not the same host as the page, browsers will most likely pop up an annoying security alert.

  4. Scott McClure Says:

    Actually, there are lots of restrictions on what host you can load data from. If it is not the same host as the page, browsers will most likely pop up an annoying security alert.

  5. Larry Says:

    XmlHttpRequest is just a hack for enabling something that should have been fixed 5 years ago in the HTML and HTTP specifications. Give me real rich components like in XUL and I’ll be satisfied.

  6. Larry Says:

    XmlHttpRequest is just a hack for enabling something that should have been fixed 5 years ago in the HTML and HTTP specifications. Give me real rich components like in XUL and I’ll be satisfied.

  7. James Strachan Says:

    If you want dynamic pages with real time delivery of data, try taking a look at Streamlets…

    http://activemq.org/Streamlets

    And enterprise message bus with integrated XmlHttpRequest support. Cool eh? Aggregate dynamic business events across your enterprise and deliver them straight into your browser.

  8. James Strachan Says:

    If you want dynamic pages with real time delivery of data, try taking a look at Streamlets…

    http://activemq.org/Streamlets

    And enterprise message bus with integrated XmlHttpRequest support. Cool eh? Aggregate dynamic business events across your enterprise and deliver them straight into your browser.

  9. Ken Meltsner Says:

    I have a lot of experience with “componentized” web pages from work on my employer’s portal product.

    We use IFRAME heavily to provide portlets that can be loaded separately and independently from multiple sites.

    Cross-site scripting isn’t a problem, as long as you don’t try to control iframe/frame content from above. Allowing child frames to register callbacks bypasses most XSS problems. We use this for interportlet communication, for example.

    The one problem that users have — if the sites loaded in the iframes have “friendly” Javascript that doesn’t assume their iframe is the top object as well — is that back and forward are associated with each iframe. We’ve tried tricks like adding back and forward buttons to portlet frames, but it never works well. The whole notion of composite pages doesn’t correspond well to user assumptions that the page is a single view; in many ways, it would be better if the composite page were provided by the browser (just like tabs are) and not by the portal server through IFRAME magic.

    XMLHTTPRequest-based pages have to meet the same expectations. I’ve seen too many cases where great Web pages confuse ordinary users because they don’t act like Web pages should — this is a significant barrier to innovation, but there’s no way around it.

  10. Ken Meltsner Says:

    I have a lot of experience with “componentized” web pages from work on my employer’s portal product.

    We use IFRAME heavily to provide portlets that can be loaded separately and independently from multiple sites.

    Cross-site scripting isn’t a problem, as long as you don’t try to control iframe/frame content from above. Allowing child frames to register callbacks bypasses most XSS problems. We use this for interportlet communication, for example.

    The one problem that users have — if the sites loaded in the iframes have “friendly” Javascript that doesn’t assume their iframe is the top object as well — is that back and forward are associated with each iframe. We’ve tried tricks like adding back and forward buttons to portlet frames, but it never works well. The whole notion of composite pages doesn’t correspond well to user assumptions that the page is a single view; in many ways, it would be better if the composite page were provided by the browser (just like tabs are) and not by the portal server through IFRAME magic.

    XMLHTTPRequest-based pages have to meet the same expectations. I’ve seen too many cases where great Web pages confuse ordinary users because they don’t act like Web pages should — this is a significant barrier to innovation, but there’s no way around it.

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