Generally-speaking, if you use built-in browser behavior (standard HTML forms, minimal/no use of javascript except to add functionality on top of the built-in browser behavior), you'll already be way ahead of most modern web developers in terms of accessibility and compatibility.
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Generally-speaking, if you use built-in browser behavior (standard HTML forms, minimal/no use of javascript except to add functionality on top of the built-in browser behavior), you'll already be way ahead of most modern web developers in terms of accessibility and compatibility.