ㄧ.Forms:核取方塊與選項按鈕
<body data-spy="scroll" data-target="#nav-demo">
  <div class="component" id="demo" style="height: 300vh">
    <div class="form-check form-check-inline">
      <label class="form-check-label">
        <input type="checkbox" class="form-check-input">
        A
      </label>
    </div> 
    <div class="form-check form-check-inline">
      <label class="form-check-label">
        <input type="checkbox" class="form-check-input">
        B
      </label>
    </div> 
    <div class="form-check form-check-inline">
      <label class="form-check-label">
        <input type="checkbox" class="form-check-input">
        C
      </label>
    </div> 
    
    <div class="form-check form-check-inline">
      <label class="form-check-label">
        <input type="radio" name="demo" value="a" class="form-check-input">
        A
      </label>
    </div> 
    <div class="form-check form-check-inline">
      <label class="form-check-label">
        <input type="radio" name="demo" value="b" class="form-check-input">
        B
      </label>
    </div> 
    <div class="form-check form-check-inline">
      <label class="form-check-label">
        <input type="radio" name="demo" value="c" class="form-check-input">
        C
      </label>
    </div> 
  </div>
</body>
.demo.component{
  padding: 50px;
}
重點: