Question

我开始使用javascript学习编程。我的目标是让程序向用户询问一组是/否问题。到目前为止，我一直在使用提示功能进行询问，但我想要一些不那么具有侵略性的东西，比如按钮。问题是我不能让程序等待答案被选中而不使用while循环，冻结程序。有没有办法让while循环表现？如果不是我该怎么办？

代码（简化，只是功能和按钮）：

var currentAnswer = "unanswered"

function Change2Yes(){
    currentAnswer = "y"
}
function Change2No(){
    currentAnswer = "n"
}
function Change2Maybe(){
    currentAnswer = "m"
}

function question(x){
    document.write(x)
    while (currentAnswer != "y" && currentAnswer != "n" && currentAnswer != "m"){
        //do nothing THIS IS THE PART THAT FREEZES THE PROGRAM
    }
    if(currentAnswer == "y"){
        answerlist.push("y");
        latestAnswer="y";
    }
    else if(currentAnswer == "n"){
        answerlist.push("n");
        latestAnswer="n";
    }
    else if(currentAnswer== "m"){
        answerlist.push("m");
        latestAnswer="n";
    }

    currentAnswer= "unanswered"
}

<button id="btnYes" onclick="Change2Yes()">
    Yes
</button>
<button id="btnNo" onclick="Change2No()">
    No
</button>
<button id="btnMaybe" onclick="Change2Maybe()">
    Maybe
</button>

非常感谢：）

Answer 1

你应该使用事件。添加点击监听器，例如：

var buttons = Array.prototype.slice.call(document.querySelectorAll('button'));

buttons.forEach(function (button) {
    button.addEventListener('click', answer.bind(this, button.value));
});

function answer(currentAnswer) { ... };

单击按钮后将调用answer函数。

http://jsfiddle.net/fWeq6/

Javascript是/否/也许问问函数

1 个答案: