Opera Mini is not a browser but rather a view into a browser in The Cloud. All network connections and JavaScript evaluation happens elsewhere, and the phone displays the resulting image and proxies clicks back to the server. Apple's sticking point has always been code evaluation on the phone, and currently only permits JavaScriptCore to evaluate code retrieved over the network.
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Opera Mini is not a browser but rather a view into a browser in The Cloud. All network connections and JavaScript evaluation happens elsewhere, and the phone displays the resulting image and proxies clicks back to the server. Apple's sticking point has always been code evaluation on the phone, and currently only permits JavaScriptCore to evaluate code retrieved over the network.