Question

Friends I was making a calculator like project so It is a full webpage that displays my calculator. For inputs from keyboard all other keys worked. And I also want to use backspace key to do [del] command as in calculator. But it always goes to Backward visited site. Here’s my code:

$(document).keypress(function(e){
 var e=window.event || e
var keyunicode=e.charCode || e.keyCode
if(keyunicode>=40 && keyunicode<=57 && keyunicode!=44)
{
    //call a function [worked]
}
else if(keyunicode==61)
{
// call another function worked.
}
else if(keyunicode==8)
{
e.preventDefault();
delete_last();

return false;
}

});

Please help. I tried in chrome..

Answer 1

You should use a keydown listener to catch backspace. keypress is meant for character keys. keydown is useful for functional keys.

$(document).keydown(function (e) {
  if (e.which === 8) {
    //your custom action here
    return false;
  }
});