It is *not* an "HTML5-powered client"...
It is *not* an "HTML5-powered client" and never has been. It's always been yet another horror of a Single Page JavaScript Application. Always destined to fail in multiple ways, whether then immediate reliability, accessibility, usability and later in this case relying on yet another "flavour of the month" JavaScript library which largely attempts to (badly) replicate standard browser HTML and CSS functionality.
Want a vaguely reliable web application? Want one that has a hope of accessibility and reliability, particularly cross browsers and devices? Then develop HTML first (with CSS added for presentation). Then, if still desired or even necessary, add the minimum amount of JavaScript to enhance the HTML and CSS, never to generate or control the HTML and CSS.
Biting the hand that feeds IT
