问Javascript: setTimeout和多个Prompts
EN

Stack Overflow用户

提问于 2015-08-13 15:15:20

回答 1查看 363关注 0票数 0

我有一个javascript代码，它在页面启动时加载一个提示：“您相信.”得到答案。返回“我看到”警报，不管用户输入什么，等待10,000毫秒，然后输入第二个提示符。不知道我做错了什么。当我删除超时函数及其下面的所有内容时，提示工作正常，但不确定如何使rest工作。

<!DOCTYPE html>
<html>
<head>
<title>T-Master, what drink would you like?</title>
</head>

<body>


<script>
window.onload=first();

function first(){
var answer = prompt("Do you believe you have the power to change the world?");

switch(answer){
    default:
    alert("...I see");

setTimeout(function(){
    //do what you need here
}, 
10000);

}

var answer2 = prompt("Master, your drink?");
var text;

switch(answer2){
    case "Gatorade":
    text = "THat's what I thought sire";
    break;

    case "Orange Juice":
    text = "That's a good choice sir";
    break;

    case "Bliss"
    text = "Hmm, a finer choice than what I expected";
    break;

    case "nothing";
    text = "Very well sir";
    break;

    default:
    text = "I'll get on it";
    break;
}
alert(text);
}
</script>






</body>

</html>

javascript

回答 1

Stack Overflow用户

回答已采纳

发布于 2015-08-13 15:23:15

这里有异步和同步编程的混合体。您的prompt调用是同步的，但是setTimeout是异步的，将在它后面的代码之后执行。

window.onload=first();

function first() {
    var answer = prompt("Do you believe you have the power to change the world?");

    switch(answer) {
        default :
            alert("...I see");

            setTimeout(function() {
                //do what you need here
                var answer2 = prompt("Master, your drink?"),
                    text;

                switch(answer2) {
                    case "Gatorade" :
                        text = "That's what I thought sire";
                        break;
                    case "Orange Juice" :
                        text = "That's a good choice sir";
                        break;
                    case "Bliss" :
                        text = "Hmm, a finer choice than what I expected";
                        break;
                    case "nothing" :
                        text = "Very well sir";
                        break;
                    default :
                        text = "I'll get on it";
                        break;
                }

                alert(text);
            }, 10000);
    }
}

票数 -3

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原文链接：

https://stackoverflow.com/questions/31992246

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