为什么我的 javascript 无法正常工作？

Question

只显示脚本上方的 html 文本；提示永远不会出现。我不知道什么是 missing/wrong。又是作业，我没补上theme/content哈哈。

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>Part 1 Problem 6</title>
    </head>
    <body>
        <h1>JS Lab 1 Question Answers</h1>
        <ol>
            <li>document.write is the script that tells the browser to write certain text. document.getElementById allows you to change certain text that is already written by calling it by its id. Using document.getElementById, you can modify a large group of your code at the same time.</li>
            <li>A variable holds the place of a certain value in your code, like a number or a name. An array holds multiple values</li>
            <li>If there was no variable with the prompt, you would still get the prompt but nothing would be done about it. What you enter into the prompt becomes the value of the variable.</li>
            <!--<script>document.write("<li>To generate a random number between 50 and 350 (not including 350) you would write var randnum (or whatever you name your variable) = (Math.floor(Math.random() * 300) + 50)</li>")</script>-->
            <li>If you generate 4 different random numbers, you should have at least 4 variables.</li>
        </ol>
        <script>
            var insultarray = new Array();
            insultarray[0] = "You smell bad";
            insultarray[1] = "You are ugly";
            insultarray[2] = "I just really don't like you";
            insultarray[3] = "You are annoying";
            insultarray[4] = "Your hair looks bad";
            var randnum = (Math.floor(Math.random()*5);
            var x = prompt("Want to know what I think?","yes");
            if (x == "yes")
            {
                document.write("<p>" + insultarray[randnum] + "</p>");
            }
            else
            {
                document.write("<p>Honestly, I like you.</p>");
            }
        </script>
    </body>
</html>

Answer 1

你在 Math.floor(Math.random()*5) 中有一个前导括号，我在下面删除了它，现在可以使用了。

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>Part 1 Problem 6</title>
    </head>
    <body>
        <h1>JS Lab 1 Question Answers</h1>
        <ol>
            <li>document.write is the script that tells the browser to write certain text. document.getElementById allows you to change certain text that is already written by calling it by its id. Using document.getElementById, you can modify a large group of your code at the same time.</li>
            <li>A variable holds the place of a certain value in your code, like a number or a name. An array holds multiple values</li>
            <li>If there was no variable with the prompt, you would still get the prompt but nothing would be done about it. What you enter into the prompt becomes the value of the variable.</li>
            <!--<script>document.write("<li>To generate a random number between 50 and 350 (not including 350) you would write var randnum (or whatever you name your variable) = (Math.floor(Math.random() * 300) + 50)</li>")</script>-->
            <li>If you generate 4 different random numbers, you should have at least 4 variables.</li>
        </ol>
        <script>
            var insultarray = new Array();
            insultarray[0] = "You smell bad";
            insultarray[1] = "You are ugly";
            insultarray[2] = "I just really don't like you";
            insultarray[3] = "You are annoying";
            insultarray[4] = "Your hair looks bad";
            var randnum = Math.floor(Math.random()*5);
            var x = prompt("Want to know what I think?","yes");
            if (x == "yes")
            {
                document.write("<p>" + insultarray[randnum] + "</p>");
            }
            else
            {
                document.write("<p>Honestly, I like you.</p>");
            }
        </script>
    </body>
</html>

Answer 2

var randnum = (Math.floor(Math.random()*5);

Math.floor前面有括号，去掉。

Answer 3

大声笑你的脚本有一个更像是受伤问题的人为解释顺便说一句，你只是漏掉了一个括号

var insultarray = new Array();
insultarray[0] = "You smell bad";
insultarray[1] = "You are ugly";
insultarray[2] = "I just really don't like you";
insultarray[3] = "You are annoying";
insultarray[4] = "Your hair looks bad";
var randnum = (Math.floor(Math.random()*5));
var x = prompt("Want to know what I think?","yes");
if (x == "yes")
{
  document.write("<p>" + insultarray[randnum] + "</p>");
}
else
{
  document.write("<p>Honestly, I like you.</p>");
}

<h1>JS Lab 1 Question Answers</h1>
<ol>
  <li>document.write is the script that tells the browser to write certain text. document.getElementById allows you to change certain text that is already written by calling it by its id. Using document.getElementById, you can modify a large group of your code at the same time.</li>
  
  <li>A variable holds the place of a certain value in your code, like a number or a name. An array holds multiple values</li>

  <li>If there was no variable with the prompt, you would still get the prompt but nothing would be done about it. What you enter into the prompt becomes the value of the variable.</li>

  <li>If you generate 4 different random numbers, you should have at least 4 variables.</li>
</ol>

Answer 4

您忘记在第 23 行添加右括号，应该是：

var randnum = Math.floor(Math.random()*5);

这些错误可以通过查看控制台来发现。

为什么我的 javascript 无法正常工作？

Why might my javascript not be working?

javascript

arrays

prompt