ReferenceError: data is not defined

这个错误的原因是因为在代码中使用了一个未定义的变量data。根据引用的信息，可能是在使用jQuery的getJSON方法时没有正确的传递data参数。你可以在函数的括号里添加上data来解决这个问题。例如：

$.getJSON('http://127.0.0.1:8000/jQuery-jsonp-server?callback=?',function(data){
  $('#result').html(`姓名: ${data.name},<br> 年龄: ${data.age}`);
});

这样，就可以成功获取到data的值并使用了。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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