Example of using the debugger statement in javascript code.

debugger.js

function add(input1, input2) {
  debugger;
  return input1 + input2;
}

// Debugger is like using breakpoints in the source inspector, 
// it pauses script execution and gives you access to local variables
// Run this example and type in 'input1' into the console when the page 
// goes gray -- you have access to the scope where you put the 'debugger' statement!