title: Chai.js - Check if string contains substring from a list
body: <p>I'm using chai.js writing some automation tests. I have a string:</p>
  
  <p><code>url(http://somewhere.com/images/myimage.png)</code></p>
  
  <p>I want to do something like:</p>
  
  <p><code>expect(thatSelectedItem).contains.any('jpg', 'png', 'gif')</code></p>
  
  <p>However can't seem to find anything in chai.js</p>
  
  <p>Any have any suggestions - read the page <a href="http://chaijs.com/api/bdd/" rel="noreferrer">http://chaijs.com/api/bdd/</a> however no luck.</p>
  
  <p>Any help appreciated.</p>
  
  <p>Thanks.</p>