Onsubmit 函数刷新页面

Onsubmit function refreshes page

非常基本的代码,我无法开始工作。 onsubmit 函数被调用,但页面刷新回其原始形式,就好像它执行但随后重新启动 HTML。 console.log 闪烁,然后消失,就好像我们重新启动了页面一样。

我已经注释掉了“return false”,因为这似乎没有什么不同。

我犯了什么愚蠢的错误?提前致谢。

<form method="POST" style="display: inline" onsubmit="validateAnswer()">
  <label for="answer" >Secret Word</label>
  <input id="answer" name="answer" size="15" type="text" />
  <input type="submit" value="Submit">
</form>
<br>
<h5 id="answerText"></h3> 

 
 <script>
    function validateAnswer() {
      var y = document.getElementById("answer").value;
      console.log("y: " + y);
      if ( y == "YOU" || y == "You" || y == "you" ){
          document.getElementById("answerText").innerHTML = "Correct!"; 
          // return false;
      } else {
          document.getElementById("answerText").innerHTML = "Sorry, that's not correct";
        // return false;
        }
    }
 </script>

您错过了 actionevent.preventDefault(); 以阻止发送表单

    function validateAnswer(event) {
        
      var y = document.getElementById("answer").value;
      console.log("y: " + y);
      if ( y == "YOU" || y == "You" || y == "you" ){
          document.getElementById("answerText").innerHTML = "Correct!"; 
          // return false;
      } else {
          document.getElementById("answerText").innerHTML = "Sorry, that's not correct";
          event.preventDefault();
          return false;
        }
    }
<form method="POST" style="display: inline" action="https://whosebug.com/" onsubmit="validateAnswer(event)">
  <label for="answer" >Secret Word</label>
  <input id="answer" name="answer" size="15" type="text" />
  <input type="submit" value="Submit">
</form>
<br>
<h5 id="answerText"></h3>