Mercurial > urweb
annotate tests/dynSpan.ur @ 1469:a354b306f948
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 |
| rev | line source |
|---|---|
| adamc@691 | 1 val x = 1 |
| adamc@691 | 2 |
| adamc@691 | 3 fun main () : transaction page = |
| adamc@691 | 4 s <- source "!"; |
| adamc@691 | 5 return <xml><body> |
| adamc@691 | 6 <dyn signal={x <- signal s; return <xml><span>{[x]}</span></xml>}/> |
| adamc@691 | 7 <button onclick={x <- get s; set s (x ^ "!")}/> |
| adamc@691 | 8 </body></xml> |