jquery键盘和显示器交互式特效

使用方法

(function() {
  $('#mac textarea').keydown(function(e) {
    var $this, code, end, start, value;
    code = e.keyCode || e.which;
    //console.log code
    if (code === 18 || code === 16) {
      $('#kc-' + code + 'R').addClass('active');
      $('#kc-' + code + 'L').addClass('active');
    } else {
      $('#kc-' + code).addClass('active');
    }
    // spaces on tab
    if (code === 9) {
      start = this.selectionStart;
      end = this.selectionEnd;
      $this = $(this);
      value = $this.val();
      $this.val(value.substring(0, start) + "  " + value.substring(end));
      this.selectionStart = this.selectionEnd = start + 2;
      return e.preventDefault();
    }
  });

  $('#mac').keyup(function(e) {
    var code;
    code = e.keyCode || e.which;
    if (code === 18 || code === 16) {
      $('#kc-' + code + 'R').removeClass('active');
      return $('#kc-' + code + 'L').removeClass('active');
    } else {
      return $('#kc-' + code).removeClass('active');
    }
  });

  jakealbaughSignature("light");

}).call(this);