Exposing variables from PhantomJS call to injectJS - phantomjs

Question

I've followed examples for injecting jQuery from the getting started page and that works just fine. I have a local copy of jQuery in the same directory, and do something like...
if(page.injectJs('jquery.min.js')) {
page.evaluate(function(){
//Use jQuery or $
}
}
When I try to inject my own script(s), none of the functions are available to me. Say I have a script called myScript.js that just has
function doSomething() {
// doing something...
}
I cannot then use doSomething like...
if(page.injectJs('myScript.js')) {
console.log('myScript injected... I think');
page.evaluate(function() {
doSomething();
});
} else {
console.log('Failed to inject myScript');
}
I've tried
window.doSomething = function() {};
and
document.doSomething = function() {};
as well with no luck, as well as trying to call them with window.doSomething() or document.doSomething() in the subsequent page.evaluate().

Answer 1

The following works for me, maybe some other part of your app logic is wrong:
inject.coffee
page = require('webpage').create()
page.onConsoleMessage = (msg) -> console.log msg
page.open "http://www.phantomjs.org", (status) ->
if status is "success"
page.includeJs "http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js", ->
if page.injectJs "do.js"
page.evaluate ->
title = echoAndReturnTitle('hello')
console.log title
phantom.exit()
do.coffee:
window.echoAndReturnTitle = (arg) ->
console.log "echoing '#{arg}'"
console.log $(".explanation").text()
return document.title
Result:
> phantomjs inject.coffee
echoing 'hello'
PhantomJS is a headless WebKit with JavaScript API.
It has fast and native support for various web standards:
DOM handling, CSS selector, JSON, Canvas, and SVG.
PhantomJS is created by Ariya Hidayat.
PhantomJS: Headless WebKit with JavaScript API
or if you prefer JavaScript (they're auto-generated and a little ugly):
`inject.js':
// Generated by CoffeeScript 1.3.1
(function() {
var page;
page = require('webpage').create();
page.onConsoleMessage = function(msg) {
return console.log(msg);
};
page.open("http://www.phantomjs.org", function(status) {
if (status === "success") {
return page.includeJs("http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js", function() {
if (page.injectJs("do.js")) {
page.evaluate(function() {
var title;
title = echoAndReturnTitle('hello');
return console.log(title);
});
return phantom.exit();
}
});
}
});
}).call(this);
do.js:
// Generated by CoffeeScript 1.3.1
(function() {
window.echoAndReturnTitle = function(arg) {
console.log("echoing '" + arg + "'");
console.log($(".explanation").text());
return document.title;
};
}).call(this);