Question

由于某种原因，此功能无法正常工作且警报框没有弹出，但我的代码与另一个有效的页面相同。我在这里错过了一些愚蠢的东西吗？

<!DOCTYPE html>
<html>
<head>
  <title>What's my name?</title>
  <script>
    function whatsMyName() {
        var first = "firstname";
        var last = "lastname";
        alert("My name is"+" "first+" "+last);
    }
  </script>
</head>
<body>
  <button type="button" onclick=whatsMyName()>What's my name?</button>
  <br><br>
  <a href="index.html">Return</a>
</body>
</html>

Answer 1

你好像搞砸了很多报价。

修正了你：

<!DOCTYPE html>

<html>
<head>
  <title>What's my name?</title>
  <script>
    function whatsMyName() {
        var first = "Corey";
        var last = "LeBlanc";
        alert("My name is " + first + " " + last);
    }
  </script>
</head>
<body>
  <button type="button" onclick="whatsMyName();">What's my name?</button>
  <br><br>
  <a href="index.html">Return</a>
</body>
</html>

Answer 2

的变化：

alert("My name is"+" "+first+" "+last); // missing "+" before "first"
<button type="button" onclick="whatsMyName()">What's my name?</button>

的onclick = “whatsMyName（）”

Answer 3

应该是......

<button type="button" onclick="whatsMyName()">What's my name?</button>

也alert("My name is"+" "+first+" "+last);

Answer 4

两个错误：

变化： <button type="button" onclick=whatsMyName()>What's my name?</button>

要： <button type="button" onclick="whatsMyName()">What's my name?</button>

变化： alert("My name is"+" "first+" "+last);

要： alert("My name is"+" "+first+" "+last);

Answer 5

您需要在＆＃34; ..＆＃34;中编写功能。并改变警告......如下所示

alert("My name is" + " " +first+ " " +last); 

<body>
  <button type="button" onclick = "whatsMyName()">What's my name?</button>
  <br><br>
  <a href="index.html">Return</a>
</body>

我的JavaScript函数由于某种原因不起作用

5 个答案: