javascript - 如果高于分配的变量javascript，则删除用户输入

Question

我是一名学习 HTML/CSS/Javascript 的新程序员，一直在摆弄它，直到遇到一个错误。我让计算机猜测我的数字 (0-5)，但后来意识到如果我输入的数字大于 5，网站就会崩溃。有什么办法可以做到，如果用户输入的数字大于 5，它会自动删除它吗？或者那不是 Javascript。提前致谢:)

document.getElementById("guess").onclick=function() {

    var gotit=false;
    var guesses=1;
    var x;

    while(gotit==false) {

        x=Math.random();
        x=6*x;
        x=Math.floor(x);

        if(document.getElementById("myNumber").value==x) {
            gotit=true;
        } else {
            guesses++;
        }
    }

    alert("Got it! It was a " + x + ". It only took me " + guesses + " guesses!");

}

Answer 1

试试这个:

 document.getElementById("guess").onclick=function() {      
        if(document.getElementById("myNumber").value > 5) {
            document.getElementById("myNumber").value = "";
            alert("Please provide a number that is with in 0 to 5");
        } else {
            var gotit=false;
            var guesses=1;
            var x;

            while(gotit==false) {

                x=Math.random();
                x=6*x;
                x=Math.floor(x);

                if(document.getElementById("myNumber").value==x) {
                    gotit=true;
                } else {
                    guesses++;
                }
            }

            alert("Got it! It was a " + x + ". It only took me " + guesses + " guesses!");
    }