jQuery-将Ajax jSON响应存储为变量 [英] Jquery - Store Ajax jSON response as variable

问题描述

我正在尝试获取ajax请求的结果，以将其设置为可以在该请求之外访问的变量.我已经尝试过 JQuery-将ajax响应存储到全局变量中，但是我的变量beer在$.getJSON和$.ajax函数之外仍然未定义(我都尝试过).

I'm trying to get the result of an ajax request to set in a variable which I can access outside that request. I've tried this JQuery - Storing ajax response into global variable but my variable beer remains undefined outside the $.getJSON and $.ajax functions (I tried both).

这是我的代码，可以在其中查看console.log(beer)的结果.

Here is my code and where I am able to see the results from the console.log(beer).

var beer;
$.getJSON(jsonUrl, function (json) {
    beer = json;
    console.log(beer); // returns beer
});
console.log(beer); // returns undefined

var beer = (function () {
    var result;

    $.ajax({
        url: jsonUrl,
        success: function (data) {
            result = data;
            console.log(beer); // returns beer

        }
    });
    console.log(result); // returns undefined
    if (result) return result;
})();
console.log(beer); // returns undefined

推荐答案

这是一个异步请求，因此它会被触发，但是您的脚本不会等待响应再继续运行.如果您需要等待ajax请求完成，请尝试以下操作:

That's an asynchronous request, so it gets fired off, but your script doesn't wait around for a response before it moves on. If you need to wait on a ajax request to finish, try something like this:

var beer;
$.getJSON(jsonUrl,function(json){
    beer = json;   
    checkDrink();                
});         

function checkDrink() {
    console.log(beer);
}   

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