无法将JSON数据从Django发送到javascript

import json
from django.http import HttpResponse

def my_view(request):
    data = {'key': 'value'}
    json_data = json.dumps(data)
    return HttpResponse(json_data, content_type='application/json')

var xhr = new XMLHttpRequest();
xhr.open('GET', '/my_view/', true);
xhr.onreadystatechange = function() {
    if (xhr.readyState === 4 && xhr.status === 200) {
        var json_data = JSON.parse(xhr.responseText);
        // 处理JSON数据
    }
};
xhr.send();

$.ajax({
    url: '/my_view/',
    type: 'GET',
    success: function(json_data) {
        // 处理JSON数据
    }
});