var deligate = require('deligate');

document.body.addEventListener('click', deligate('button.some-class', function(event){
  console.log('clicked the button');
}));
 
// ... more likely
 
var handler =  deligate('button.some-class', function(event){
  console.log('clicked the button');
});
 
document.body.addEventListener('click', handler);
 
// ... later
document.body.removeEventListener('click', handler);