Showing Phantom supporting searching for text using the normal browser DOM APIs.

findText.js

var page = require("webpage").create();

page.onConsoleMessage = function(msg) {
  console.log('[PAGE] Message: ' + msg);
};

page.open("http://google.com/", function(status) {
  if (status !== "success") {
    console.error("Failed to load the page. Usually this means some resource failed to load.");
    phantom.exit(1);
    return;
  }
  console.log("Loaded the page successfully!");
  page.evaluate(function() {
    console.log('`window.find` exists: ' + (!!window.find));
    console.log('`typeof window.find`: ' + (typeof window.find));
    console.log('result of `window.find("about")`: ' + window.find("about"));
    console.log('result of `window.find("BlahBlahBlah")`: ' + window.find("BlahBlahBlah"));
  });
  phantom.exit(0);
});

output.txt

$> phantomjs.exe findText.js
Loaded the page successfully!
[PAGE] Message: `window.find` exists: true
[PAGE] Message: `typeof window.find`: function
[PAGE] Message: result of `window.find("about")`: true
[PAGE] Message: result of `window.find("BlahBlahBlah")`: false

$>