[JS/JQUERY] input text 숫자만 입력 (정규식)

<input type="text" name="mt_tel" id="mt_tel" placeholder=" '-' 없이 입력하세요." maxlength="11" oninput="telinput(this.value)" />​

function telinput(mt_tel){
    const regex = /^\d+$/;
    if (!regex.test(mt_tel)) {
        mt_tel = mt_tel.replace(/\D/g, '');
    }
    $("#mt_tel").val(mt_tel);
}