Not allow Korean character(Hangul) for input text

Question

I want to allow typing Latin Characters but I don't want user can type Korean Hangul characters. Please help me answer. Thank you in advance.

Answer 1

Based on this article, https://en.wikipedia.org/wiki/Korean_language_and_computers

You would want to do something like this (untested):

$(document).on('keypress', 'input', function (e) {
    var key = event.which || event.keyCode;

    // Hangul Syllables
    if (key >= 0xAC00 && key <= 0xD7A3) {
        e.preventDefault();
    }

    // Hangul Jamo
    if (key >= 0x1100 && key <= 0x11FF) {
        e.preventDefault();
    }

    // Hangul Compatibility Jamo 
    if (key >= 0x3130 && key <= 0x318F) {
        e.preventDefault();
    }

    // Hangul Jamo Extended-A
    if (key >= 0xA960 && key <= 0xA97F) {
        e.preventDefault();
    }

    // Hangul Jamo Extended-B 
    if (key >= 0xD7B0 && key <= 0xD7FF) {
        e.preventDefault();
    }
});

However, this would not stop anyone from copying/pasting Hangul characters into the input field, you would need to find something separate for that.

A more simplified way is to use form validation (this is a more simplified approach):

<input type="text" pattern="[^?-?]+">

What you should do is instead be testing for the characters on the server side and returning a form error.