jquery implements a method to update the contents of a drop-down list when triggered_jquery

The example in this article describes how jquery implements the method of updating the contents of a drop-down list when triggered. Share it with everyone for your reference, the details are as follows:

If the server has a request address to return the required data

url:/hello

Returns something like:

Copy code The code is as follows:

[{"Watermelon":10},{"Apple":12},{ "Banana":13},{"Mango":14}]

Such json data

html:

Button:

Drop-down list:

js code:

$(function(){
  $("#btn").click(
   $.ajax({
  type:"POST",
  url:"http://localhost/XXXX/Test",
  cache: false,//不缓存
  dataType:"json",//返回数据格式
  success:function(ret){ 
    $("#sel").empty(); 
    $.each(ret,function(ind){
    for(var key in ret[ind]){
      var opt = $("<option></option>");
     opt.val(ret[ind][key]);
    opt.text(key);
    $("#sel").append(opt);
   }
  });
   }
 });
 );
});

I hope this article will be helpful to everyone in jQuery programming.