The difference between CharCode and KeyCode

Get keyboard keys under standard browser We can use E.which, but there is no such attribute under non-standard, so keycode is used in most cases, but there is a compatibility problem. Let's look at the difference between his two:

Onkeydown:e.keycode has value

Onkeyup:e.keycode has value

Onkeypress:e.keycode is 0

Onkeydown:e.charcode is 0

Onkeyup:e.charcode is 0

Onkeypress:e.charcode has value

Conclusion: CharCode Returns the letter code of the onkeypress Event trigger key value.

KeyCode returns the code for the key of the onkeydown or onkeyup event.

Do some compatibility processing:

function MyFunction (e) {    | | (e = window.event);     if NULL ) {        null ? e.charcode:e.keycode;    }}

The difference between CharCode and KeyCode