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view tests/dynSpan.ur @ 1469:a354b306f948

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Explain how to signal an error in a commit handler
author Adam Chlipala <adam@chlipala.net>
date Tue, 31 May 2011 09:14:03 -0400
parents cc58941da3e2
children
line wrap: on
line source
val x = 1

fun main () : transaction page =
    s <- source "!";
    return <xml><body>
      <dyn signal={x <- signal s; return <xml><span>{[x]}</span></xml>}/>
      <button onclick={x <- get s; set s (x ^ "!")}/>
    </body></xml>