contextBinding.js

// Option 1
$(body).on('click', function(){
  console.log(this); // body
});

// Option 2
function onClick(){
  console.log(this);
}

$(body).on('click', onClick.bind($(body));

// Option 3/3.5
function onClick2(element){
  console.log(element);
}

// These do the same thing
$(body).on('click', onClick2.bind(this, $(body)));
$(body).on('click', function(){
  onClick2($(this));
});