jQuery实现select模糊查询（反射机制）

通过如下代码就可以简单实现select带模糊查询的条件查询，具体如下jquery.select.js如下：

 (function($) {
 $.selectSuggest = function(target, data, itemSelectFunction) {
 var defaulOption = {
  suggestMaxHeight: '200px',//弹出框最大高度
  itemColor : '#000000',//默认字体颜色
  itemBackgroundColor:'RGB(199,237,204)',//默认背景颜色
  itemOverColor : '#ffffff',//选中字体颜色
  itemOverBackgroundColor : '#C9302C',//选中背景颜色
  itemPadding : 3 ,//item间距
  fontSize : 12 ,//默认字体大小
  alwaysShowALL : true //点击input是否展示所有可选项
  };
  var maxFontNumber = 0;//最大字数
  var currentItem;
  var suggestContainerId = target + "-suggest";
  var suggestContainerWidth = $('#' + target).innerWidth();
  var suggestContainerLeft = $('#' + target).offset().left;
  var suggestContainerTop = $('#' + target).offset().top + $('#' + target).outerHeight();
  var showClickTextFunction = function() {
  $('#' + target).val(this.innerText);
  currentItem = null;
  $('#' + suggestContainerId).hide();
  }
  var suggestContainer;
  if ($('#' + suggestContainerId)[0]) {
  suggestContainer = $('#' + suggestContainerId);
  suggestContainer.empty();
  } else {
  suggestContainer = $('<div></div>'); //创建一个子<div>
  }
  suggestContainer.attr('id', suggestContainerId);
  suggestContainer.attr('tabindex', '0');
  suggestContainer.hide();
  var _initItems = function(items) {
  suggestContainer.empty();
   var itemHight=0;
  for (var i = 0; i < items.length; i++) {
   if(items[i].text.length > maxFontNumber){
    maxFontNumber = items[i].text.length;
    }
   var suggestItem = $('<div></div>'); //创建一个子<div>
   suggestItem.attr('id', items[i].id);
   suggestItem.append(items[i].text);
   suggestItem.css({
    'padding':defaulOption.itemPadding + 'px',
   'white-space':'nowrap',
   'cursor': 'pointer',
   'background-color': defaulOption.itemBackgroundColor,
   'color': defaulOption.itemColor
   });
   suggestItem.bind("mouseover",
   function() {
   $(this).css({
    'background-color': defaulOption.itemOverBackgroundColor,
    'color': defaulOption.itemOverColor
   });
   currentItem = $(this);
   });
   suggestItem.bind("mouseout",
   function() {
   $(this).css({
    'background-color': defaulOption.itemBackgroundColor,
    'color': defaulOption.itemColor
   });
   currentItem = null;
   });
   suggestItem.bind("click", showClickTextFunction);
   suggestItem.bind("click", itemSelectFunction);
   suggestItem.appendTo(suggestContainer);
   suggestContainer.appendTo(document.body);
  }
  }
  var inputChange = function() {
  var inputValue = $('#' + target).val();
  inputValue = inputValue.replace(/[\-\[\]{}()*+?.,\\\^$|#\s]/g, "\\$&");
  var matcher = new RegExp(inputValue, "i");
  return $.grep(data,
  function(value) {
   return matcher.test(value.text);
  });
  }
  $('#' + target).bind("keyup",
  function() {
  _initItems(inputChange());
  });
  $('#' + target).bind("blur",
  function() {
   if(!$('#' + suggestContainerId).is(":focus")){
   $('#' + suggestContainerId).hide();
   if (currentItem) {
   currentItem.trigger("click");
   }
   currentItem = null;
   return;
   }
  });
  $('#' + target).bind("click",
  function() {
  if (defaulOption.alwaysShowALL) {
   _initItems(data);
  } else {
   _initItems(inputChange());
  }
  $('#' + suggestContainerId).removeAttr("style");
  var tempWidth = defaulOption.fontSize*maxFontNumber + 2 * defaulOption.itemPadding + 30;
  var containerWidth = Math.max(tempWidth, suggestContainerWidth);
  var h = this.scrollHeight;
  $('#' + suggestContainerId).css({
   'border': '1px solid #ccc',
   'max-height': '100px',
   'top': suggestContainerTop,
   'left': suggestContainerLeft,
   'width': containerWidth,
   'position': 'absolute',
   'font-size': defaulOption.fontSize+'px',
   'font-family':'Arial',
   'z-index': 99999,
   'background-color': '#FFFFFF',
   'overflow-y': 'auto',
   'overflow-x': 'hidden',
   'white-space':'nowrap'
  });
  $('#' + suggestContainerId).show();
  });
  _initItems(data);
  $('#' + suggestContainerId).bind("blur",
  function() {
  $('#' + suggestContainerId).hide();
  });
 }
 })(jQuery);

html如下：

 <!DOCTYPE html>
 <html lang="zh_cn">
  <head>
  <title>select.suggest</title>
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <!-- Bootstrap -->
  <script src="js/jquery-1.10.2.js"></script>
  <script src="js/jquery.select.js"></script>
  </head>
  <body>
  <h1>Hello, world!</h1>
  <div>
   <div>
   <div>.col-md-1
   </div>
   <div style="">
    <input id="testInput" type="text" />
   </div>
   </div>
  </div>
  <!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
  <!-- Include all compiled plugins (below), or include individual files as needed -->
  </body>
  <script type="text/javascript">
  var datas =[{"id":"2","text":"中国石油"},
  {"id":"4","text":"中国建筑"},
  {"id":"3","text":"中国移动"},
  {"id":"5","text":"中国工商银行"},
  {"id":"7","text":"中国铁建"},
  {"id":"8","text":"上海汽车集团"},
  {"id":"9","text":"中国建设银行"},
  {"id":"10","text":"联想集团"}];
  var itemSelectFuntion = function(){
   alert(this.id + "," + this.innerHTML);
  };
  $.selectSuggest('testInput',datas,itemSelectFuntion);
  </script>
 </html>

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