javascript - Disable some characters from input field

Question

I have found some instructions similar, but none helps, all of them are either for special chars or for digits.

I need to make user type only 1 , 2 , 3, 4, 5, N, O, A, B, C . all other characters should be restricted.

Any way I can make my own selection of restricted/allowed chars for inputs ?

• Not very familiar with javascript.

Answer 1

with JQuery,

$("input").keypress( function(e) {
    var chr = String.fromCharCode(e.which);
    if ("12345NOABC".indexOf(chr) < 0)
        return false;
});

without JQuery

document.getElementById("foo").onkeypress = function(e) {
    var chr = String.fromCharCode(e.which);
    if ("12345NOABC".indexOf(chr) < 0)
        return false;
};

For one liners, from @mplungjan and @matthew-lock's comment

document.querySelector("#foo").onkeypress = function(e) {
    return "12345NOABC".indexOf(String.fromCharCode(e.which)) >= 0;
};