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better setupErrorHandler

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This commit is contained in:
Andreas Rumpf 2017-04-26 14:46:01 +02:00
commit 2d1e656061
1 changed files with 6 additions and 12 deletions
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18
src/karax.nim
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@ -284,23 +284,17 @@ proc setOnHashChange*(action: proc (hashPart: cstring)) =
{.push stackTrace:off.} {.push stackTrace:off.}
proc setupErrorHandler*(useAlert=false) = proc setupErrorHandler*() =
## Installs an error handler that transforms native JS unhandled ## Installs an error handler that transforms native JS unhandled
## exceptions into Nim based stack traces. If `useAlert` is false, ## exceptions into Nim based stack traces. If `useAlert` is false,
## the error message is put into the console, otherwise `alert` ## the error message is put into the console, otherwise `alert`
## is called. ## is called.
proc stackTraceAsCstring(): cstring = cstring(getStackTrace()) proc stackTraceAsCstring(): cstring = cstring(getStackTrace())
{.emit: """ var onerror {.importc: "window.onerror".} =
window.onerror = function(msg, url, line, col, error) { proc (msg, url: cstring, line, col: int, error: cstring): bool =
var x = "Error: " + msg + "\n" + `stackTraceAsCstring`() var x = cstring"Error: " & msg & "\n" & stackTraceAsCstring()
if (`useAlert`) kout(x)
alert(x); return true # suppressErrorAlert
else
console.log(x);
var suppressErrorAlert = true;
return suppressErrorAlert;
};""".}
{.pop.} {.pop.}
proc prepend(parent, kid: Element) = proc prepend(parent, kid: Element) =