olvnikon

// https://jsfiddle.net/vk35ok2o/50/
console.log('typeof 1/0 => ', typeof 1/0);
console.log('typeof (1/0) => ', typeof (1/0));
console.log('1/0 => ', 1/0);
console.log('"Hello" * 2 => ', "Hello" * 2);
console.log('typeof ("Hello" * 2) => ', typeof ("Hello" * 2));
console.log('typeof "Hello" * 2 => ', typeof "Hello" * 2);
console.log('typeof undefined => ', typeof undefined);
console.log('typeof null => ', typeof null);
console.log('typeof function(){} => ', typeof function(){});

g-P

/*
If you try to print a gitbook directly, you get nothing but the contents because of their *just* use of `@media print` styling to hide away the content section of the books.

Fret not, here is the codez:
*/
  
  $(".book-header,.book-summary,.navigation,.book-progress").remove();
  $(".book.with-summary .book-body").css('left', '0px');
  $("*").css('position', 'static');
  window.print()