PhantomJS - evaluateJavascript()

The evaluateJavaScript method helps to execute the function passed to it as a string. Please note the string passed has to be a function only.

Syntax

Its syntax is as follows −

evaluateJavaScript(str); 

Example

Let us take an example to understand the use of evaluateJavaScript() method.

var wpage = require('webpage').create(); 
wpage.open('http://localhost/tasks/test.html', function(status) { 
   var script1 = "function(){ var a = document.title; return a;}"; 
   var value = wpage.evaluateJavaScript(script1); 
   console.log(value); 
   phantom.exit(); 
});

The above program generates the following output.

Welcome to phantomjs