为什么keypress不会在JS中返回结果？

Question

我的代码应该显示来自API的结果但不会显示任何帮助。

 $("#search").keypress(function(e){
    if(e.keyCode == 13 || e.keyCode == 10){
    var searchTerm1 = $("#search").val();

    var url = "https://en.wikipedia.org/w/api.php?action=opensearch&search="+ searchTerm1 +"&format=json&callback=?";
    $.ajax({
      url: url,
      type: "GET",
      async: false,
      dataType: "json",
      success: function(data, status, jqXHR){
         // console.log(data);
         for(var i = 0; i < data[1].length; i++) {
          $("#output").prepend("<div><div class='well'><a href="+data[3][i]+"><h2>" + data[1][i]+ "</h2>" + "<p>" + data[2][i] + "</p></a></div></div>");            
         }
      }

      });
   }
})

和HTML代码：

 <form id="demo-2">
    <input type="search" placeholder="Search" id="search">
</form>