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.
How can I make my own selection of restricted/allowed chars for inputs?
Try this
$(function(){
$('#txt').keypress(function(e){
if(e.which == 97 || e.which == 98 || e.which == 99 || e.which == 110 || e.which == 111 || e.which == 65 || e.which == 66 || e.which == 67 || e.which == 78 || e.which == 79 || e.which == 49 || e.which == 50 || e.which == 51 || e.which == 52 || e.which == 53){
} else {
return false;
}
});
});<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type='text' id='txt' value='' onpaste="return false" />Update 9th March 2018
$(function(){
$('#txt').keypress(function(e){
// allowed char: 1 , 2 , 3, 4, 5, N, O, A, B, C
let allow_char = [97,98,99,110,111,65,66,67,78,79,49,50,51,52,53];
if(allow_char.indexOf(e.which) !== -1 ){
//do something
}
else{
return false;
}
});
});<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type='text' id='txt' value='' onpaste="return false" />Update 25th November 2020
let textarea = document.getElementById('txt');
textarea.addEventListener('keydown', (e) => {
if(['1','2','3','4','5', 'N', 'O', 'A', 'B', 'C'].indexOf(e.key) !== -1){
// do something
} else {
e.preventDefault();
}
});