onPrompt
Introduced: PhantomJS 1.6
This callback is invoked when there is a JavaScript prompt on the web page. The arguments passed to the callback are the string for the message (msg) and the default value (defaultVal) for the prompt answer. The return value of the callback handler should be a string.
Examples
var webPage = require('webpage');
var page = webPage.create();
page.onPrompt = function(msg, defaultVal) {
if (msg === "What's your name?") {
return 'PhantomJS';
}
return defaultVal;
};