Since the original question was about jQuery.get, it is worth mentioning here that (as mentioned here) one could use async: false in a $.get() but ideally avoid it since asynchronous XMLHTTPRequest is deprecated (and the browser may give a warning):

$.get({
  url: url,// mandatory
  data: data,
  success: success,
  dataType: dataType,
  async:false // to make it synchronous
});

This is example:

$.ajax({
  url: "test.html",
  async: false
}).done(function(data) {
   // Todo something..
}).fail(function(xhr)  {
   // Todo something..
});

function getURL(url){
    return $.ajax({
        type: "GET",
        url: url,
        cache: false,
        async: false
    }).responseText;
}


//example use
var msg=getURL("message.php");
alert(msg);

您可以通过调用来将jQuery的Ajax设置置于同步模式

jQuery.ajaxSetup({async:false});

然后使用以下命令执行Ajax调用 jQuery.get( ... );

然后再打开一次

jQuery.ajaxSetup({async:true});

我想它的工作原理与@Adam所建议的一样，但对于希望重新配置其语法jQuery.get()或jQuery.post()更复杂的jQuery.ajax()语法的人可能会有所帮助。

优秀的解决方案！我注意到，当我尝试实现它时，如果我在成功子句中返回了一个值，那么它将以未定义的形式返回。我必须将其存储在变量中并返回该变量。这是我想出的方法：

function getWhatever() {
  // strUrl is whatever URL you need to call
  var strUrl = "", strReturn = "";

  jQuery.ajax({
    url: strUrl,
    success: function(html) {
      strReturn = html;
    },
    async:false
  });

  return strReturn;
}