title: What is Javascript 'require'?
body: <p>I was analyzing javascript codes in a chrome extension and noticed this in it.</p>
  
  <pre><code>require("name of required class/file/module") //Not sure whether it is class,file,module
  </code></pre>
  
  <p>May be its because I'm newbie to programming or something,but I cant find the 'require' keyword in javascript reference or documentation.There is 'import' statement for importing modules.
  I googled for require for javascript but all I can find is the 'require' for node.js, the server side scripting using javascript. 
  I am talking about chrome extension/client side script.Does anyone have any idea about this ?</p>