ajax模擬關鍵字智能匹配搜索效果

準備數據keyword.json：（這裏只貼出部分數據）

[
  {"id":1,"initial":"ad","keyword":"奧迪"},
  {"id":2,"initial":"ada4l","keyword":"奧迪A4L"},
  {"id":3,"initial":"ada6l","keyword":"奧迪A6L"},
  {"id":4,"initial":"adq5","keyword":"奧迪Q5"},
  {"id":5,"initial":"ada3","keyword":"奧迪A3"},
  {"id":6,"initial":"adq7","keyword":"奧迪Q7(進口)"},
  {"id":7,"initial":"ada8","keyword":"奧迪A8L(進口)"},
  {"id":8,"initial":"bm","keyword":"寶馬"},
  {"id":9,"initial":"bm5x","keyword":"寶馬5系"},
  {"id":10,"initial":"bm7x","keyword":"寶馬7系"},
  {"id":11,"initial":"bt","keyword":"本田"},
  {"id":12,"initial":"bqsbx25","keyword":"北汽紳寶 X25"},
  {"id":13,"initial":"bqsbx35","keyword":"北汽紳寶X35"},
  {"id":14,"initial":"bqsbx55","keyword":"北汽紳寶X55"}
]

html結構

<form class="fl search_form" action="#" method="post">
    <input class="search_text" id="searchKey" type="search" placeholder="請輸入搜索關鍵字" οnkeyup="searchSuggest(this);"/>
    <input class="search_btn" type="submit" value="搜索"/>
</form>
<!--start--智能搜索關鍵字匹配彈出層-->
<ul class="keywords_list"></ul>
<!--end--智能搜索關鍵字匹配彈出層-->

js：

//當在搜索框輸入內容時，根據關鍵字匹配，顯示彈出層
function searchSuggest(obj){ 
  var searchKey=$(obj).val();  
  var reg = new RegExp(searchKey,"i"); //忽略大小寫匹配搜索框中輸入的內容
  $.ajax({
    type:"get",
    url:"data/keyword.json",
    dataType:"json",
    success:function(data){
      var arr=[];
      for(var i=0,len=data.length;i<len;i++){
        if(searchKey!="" && (data[i].initial.search(reg)!=-1 || data[i].keyword.search(reg)!=-1))  {
      	   arr.push("<li οnclick='changeSearchKey(this);'>"+data[i].keyword+"</li>"); 
        }
      }     	  	  
      $(".keywords_list").html(arr).show();
    }
  });
}
//單擊匹配列表中的關鍵字選項時，將該關鍵字顯示在搜索框中
function changeSearchKey(obj){
   var value=$(obj).text();
  $("#searchKey").val(value);
  $('.keywords_list').hide(); 
}

效果圖：