JSFiddle - React, Tailwind, and code Playground

HTML

<div class="optionHolder">
    <p class="optionName">Group</p>
    <div class="option checked">
        <input type="radio" name="fileType" value="avi" />
        
        <label>AVI</label>
    </div>
    <div class="option">
        <input type="radio" name="fileType" value="mov" />
        
        <label>MOV</label>
    </div>
    <div class="option">
        <input type="radio" name="fileType" value="mp4" />
        
        <label>MP4</label>
    </div>
    <div class="option">
        <input type="radio" name="fileType" value="mp3" />
        
        <label>MP3</label>
        </div>
</div>
<br>
    <p class="optionName">Group2</p>
    <div class="option checked">
        <input type="radio" name="textType" value="avi" />
        
        <label>DOC</label>
    </div>
    <div class="option">
        <input type="radio" name="textType" value="mov" />
        
        <label>TEXT</label>
    </div>
    <div class="option">
        <input type="radio" name="textType" value="mp4" />
        
        <label>XLSX</label>
    </div>
    <div class="option">
        <input type="radio" name="textType" value="mp3" />
        
        <label>PPT</label>
        </div>
</div>
<br>
    <p class="optionName">Group3</p>
    <div class="option checked">
        <input type="radio" name="lanType" value="avi" />
        
        <label>ENG</label>
    </div>
    <div class="option">
        <input type="radio" name="lanType" value="mov" />
        
        <label>CHINESE</label>
    </div>
    <div class="option">
        <input type="radio" name="lanType" value="mp4" />
        
        <label>JAPAN</label>
    </div>
    <div class="option">
        <input type="radio" name="lanType" value="mp3" />
        
        <label>ERUO</label>
        </div>
</div>
<input type='submit' id='submit' value='submit'>

JavaScript

jQuery('#submit').click(function(event){
    
    var checkbox = $("'input:radio:checked'");
    
    if( checkbox .length != 3 ){
        alert( "有題目未填寫" );
    } 
    else{
    alert( "己送出" );
    }
      
});