How can I control PhantomJS to skip download some kind of resource?

UPDATED, Working!

Since PhantomJS 1.9, the existing answer didn’t work. You must use this code:

var webPage = require('webpage');
var page = webPage.create();

page.onResourceRequested = function(requestData, networkRequest) {
  var match = requestData.url.match(/wordfamily.js/g);
  if (match != null) {
    console.log('Request (#' + requestData.id + '): ' + JSON.stringify(requestData));
    networkRequest.cancel(); // or .abort() 
  }
};

If you use abort() instead of cancel(), it will trigger onResourceError.

You can look at the PhantomJS docs