How to use watir-webdriver to wait for page load

Question

Using watir-webdriver, how do I wait for a page to load after I click a link?

At the moment I am using:

sleep n

But this is not ideal a

Answer 1

This is how I wait for AJAX in my project:

ajax_loader = $b.element(:xpath  => "//*[@id='spinner-modal-transparent' and @aria-hidden='true']/div/div/div/div/img[@alt='Ajax transparent loader']")

if ajax_loader.exists?
  ajax_loader.wait_while_present(timeout=350)
else
  puts "The AJAX loader was not present."
end