In the course of this article we’ll discuss what this means for your development, but first, let’s look at how to create a test environment, and detect Opera Mini.
But there is a downside for developers: JavaScript can behave in unexpected ways. OBML is great for users and carriers it sends less data - up to 90% less - over the network. Note: Opera Mini versions older than 5.0 do not support progressive loading of OBML content the page loads will seem slower and more sluggish on older devices. Think of it as an interactive snapshot of a document’s state, which is similar in form to a PDF. This OBML data is progressively loaded by Opera Mini on the user’s device. The server sends the response back as normal - when this is received by the Opera transcoding servers, they parse the markup and styles, execute the JavaScript, and transcode the data into Opera Binary Markup Language (OBML).
These servers then forward the request to the server. Requests from the user’s handset pass through the carrier’s internet gateway on their way to Opera’s transcoding servers. It does this by using a proxy-based architecture (see Figure 1). Much of the reason for Mini’s popularity is that it is capable of rendering complex web pages, even on low-spec devices. (Our monthly State Of the Mobile Web reports give the latest statistics for different territories, lists of top ten handsets and websites.) Opera Mini is growing strongly on smart phones in the same period, the share of Opera Mini smartphone users in Asia Pacific countries increased from 9% to 32% in Indonesia, the increase was more than 460%. In July 2012, there were 187 million Opera Mini users, an increase of 50% over July 2011. Opera Mini is one of the world’s foremost mobile browsers, which runs on a range of devices and operating systems ranging from expensive smart phones and tablets to less expensive feature phones that are in common use across many parts of the world. ( More about Opera Mini 11 for Android.) Introduction Tap the red “O” menu, and ensure that “Savings mode” next to the Data Meter is set to “Extreme” tap to change if not.
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If you’re using Opera Mini 11 for Android (or later), ensure that the browser is set to Extreme (this is the default). See more information about Opera Mini for iOS. Opera Mini for iOS also compresses videos. Tap the red “O” menu, and choose “Opera Mini”. If you’re using the iOS version, note that you have to switch it to Mini mode to go through Opera’s Mini servers (this mode is not the default). Be sure that you’re testing with the right mode enabled. More recent versions of Opera Mini include different modes. This article is about how JavaScript behaves in Opera Mini’s proxy architecture.
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