javascript 发送数据

javascript function sendDataToServer() { var xhr = new XMLHttpRequest(); var url = "e.com/api/data"; var data = { key: 'value' }; xhr.open("POST", url, true); xhr.setRequestHeader("Content-Type", "application/json"); xhr.onreadystatechange = function () { if (xhr.readyState === XMLHttpRequest.DONE && xhr.status === 200) { console.log(xhr.responseText); } }; xhr.send(JSON.stringify(data)); }