I've been battling with Javascript errors from IE today - which is difficult on the Mac.
After finding this article on Ajaxian I implemented it with Seam + Richfaces. All it does is log client side Javascript errors to your server log. It's not as useful as I thought it would be (still no help with IE's cryptic error messages) but I thought someone might like it.
This code goes into your page (preferably in your global template where you can take it out before go live. Or not):
<head>
<!-- other head stuff -->
<script>
onerror= function handleErr(msg,url,l)
{
logJavaScriptError(msg, url, l);
}
</script>
</head>
<body>
<h:form>
<a:jsFunction action="#{javascriptLogger.error}" name="logJavaScriptError">
<a:actionparam name="msg" assignTo="#{javascriptLogger.message}"/>
<a:actionparam name="url" assignTo="#{javascriptLogger.url}"/>
<a:actionparam name="l" assignTo="#{javascriptLogger.lineNumber}"/>
</a:jsFunction>
</h:form>
And a component to log it:
@Name("javascriptLogger")
@BypassInterceptors
public class JavascriptLogger {
private String message;
private String url;
private String lineNumber;
public void setMessage(String message) {
this.message = message;
}
public void setUrl(String url) {
this.url = url;
}
public void setLineNumber(String lineNumber) {
this.lineNumber = lineNumber;
}
public void error() {
Log log = Logging.getLog(JavascriptLogger.class);
log.error("Javascript error: #0 from URL #1 at Line #2", message, url, lineNumber);
}
}
Cheers,
Damian.
