I would like to read a value from a properties file in the beforepageload event. unfortunately I load the properties file as a variable via a theme but ofcourse this does not work because it is not available yet.
Is there anoter way to read in the file via SSJS ?
You can add the properties file as a "bundle" to the XPage's resources:
<xp:this.resources>
<xp:bundle src="/XYZ.properties" var="XYZ"></xp:bundle>
</xp:this.resources>
and directly get any of its property values with:
var propvalue = XYZ.propkey;