Pass arguments with page.evaluate
I've had that exact problem. It can be done with a little trickery, because page.evaluate
also can accept a string.
There are several ways to do it, but I use a wrapper called evaluate
, which accepts additional parameters to pass to the function that must be evaluated on the webkit side. You would use it like this:
page.open(url, function() {
var foo = 42;
evaluate(page, function(foo) {
// this code has now has access to foo
console.log(foo);
}, foo);
});
And here is the evaluate()
function:
/*
* This function wraps WebPage.evaluate, and offers the possibility to pass
* parameters into the webpage function. The PhantomJS issue is here:
*
* http://code.google.com/p/phantomjs/issues/detail?id=132
*
* This is from comment #43.
*/
function evaluate(page, func) {
var args = [].slice.call(arguments, 2);
var fn = "function() { return (" + func.toString() + ").apply(this, " + JSON.stringify(args) + ");}";
return page.evaluate(fn);
}
The change has been pushed and now you can use it as
page.open(url, function() {
var foo = 42;
page.evaluate( function(foo) {
// this code has now has access to foo
console.log(foo);
}, foo);
}
The push details are here: https://github.com/ariya/phantomjs/commit/81794f9096
You can pass in the arguments to the function as arguments to page.evaluate.
Example:
page.evaluate(function(arg1, arg2){
console.log(arg1); //Will print "hi"
console.log(arg2); //Will print "there"
}, "hi", "there");
There is the solution that works with PhantomJS 0.9.2 and 0.2.0:
page.evaluate(
function (aa, bb) { document.title = aa + "/" + bb;}, //the function
function (result) {}, // a callback when it's done
"aaa", //attr 1
"bbb"); //attr 2