input 文本框禁止輸入表情

js在用戶輸入表情時自動過濾掉

<input type="text" id="input" maxlength="10"/>

var noEmoji = function(dom) {
       var html = $(dom).val(),
          oldHtml = "";
       oldHtml = html;
       var reg = /[^\u0020-\u007E\u00A0-\u00BE\u2E80-\uA4CF\uF900-\uFAFF\uFE30-\uFE4F\uFF00-\uFFEF\u0080-\u009F\u2000-\u201f\u2026\u2022\u20ac\r\n]/g;
       if(html.match(reg)) {
          html = html.replace(reg, '');
       }

       if(html != oldHtml) {
           $(dom).val(html);
       }
       /**
        * 光標移到最后
        */
       function endFocus(dom) {
          var sel = window.getSelection();
          var range = document.createRange();
          range.selectNodeContents(dom);
          range.collapse(false);
          sel.removeAllRanges();
          sel.addRange(range);
       }
    };

$('#input').keyup(function(){
    noEmoji($(this));
})