Ajax请求答案比代码慢，ajax处理代码后请求

Question

我收到 ajax 请求非常慢，所以我的统计数据数组在我第二次访问它时没有得到更新。似乎 ajax 请求是在处理完所有代码后执行的。有没有办法让我等待 ajax 请求在我的所有其余代码之前执行？

console.log(stats);
fetchREST(false, (url+selectedID+"/solve"), (parseInt(button.id)+1), function(data){
 if (data.success) {
  console.log("richtig");
  stats.right++;
 } else {
  console.log("falsch");
  stats.wrong++;
 }
});
console.log(stats);

function fetchREST(isGET, path, answer, callback) {
    var httpRequest = new XMLHttpRequest();
    httpRequest.onreadystatechange = function() {
        if (httpRequest.readyState === 4) {
            if (httpRequest.status === 200) {
                var data = JSON.parse(httpRequest.responseText);
                if (callback) callback(data);
            }
        }
    };

    let email = "*";
    let pw = "*";

    if(isGET) {
        // not needed
    } else {
        let solutionArray = '[' +  answer +  ']';
        console.log(solutionArray);
        httpRequest.open('POST', path, true);
        httpRequest.setRequestHeader("Content-Type", "application/json");
        httpRequest.setRequestHeader("Access-Control-Allow-Origin", "*"); 
        httpRequest.setRequestHeader("Access-Control-Allow-Headers", "*");
        httpRequest.setRequestHeader("Authorization", "Basic " + window.btoa(email + ":" + pw));
        httpRequest.send(solutionArray);
    }
}

编辑我通过更改

修复了它

httpRequest.open('POST', path, true);

到

httpRequest.open('POST', path, false);

现在异步设置为 false，发送方法等待收到响应。

Answer 1

我通过更改

自己修复了它

httpRequest.open('POST', path, true);

至

httpRequest.open('POST', path, false);

现在异步设置为 false，发送方法等待收到响应。

Ajax请求答案比代码慢，ajax处理代码后请求

Ajax Request Answer is slower than code, ajax request after code is processed

javascript

ajax

rest