Can I Nest a `` Inside a `` in a Bootstrap Form?

Nest Div Inside Label in Bootstrap Form

When using Bootstrap for creating horizontal forms, the default template frequently assigns IDs to each input field. To avoid this, some developers attempt to enclose the input field and its label within a block-level

element inside the tag, as follows:

<form class="form-horizontal" role="form">
  <div class="form-group">
    <label class="block">
      <span class="col-lg-2 control-label">Email</span>
      <div class="col-lg-10">
        <input type="email" class="form-control">
      </div>
    </label>
  </div>
</form>

While this approach may seem to solve the issue, it conflicts with HTML standards.

Addressing the Incompatibility

According to the HTML specification, a element cannot contain a

element. The specification explicitly states that the element's content model only allows phrasing content, which includes inline elements such as and , but not block-level elements like

.

Therefore, nesting a block-level

inside the inline element is incorrect behavior.

Possible Solution

If you wish to avoid using IDs for input fields while maintaining proper HTML structure, consider using the "for" attribute on the element to associate it with specific input fields:

<form class="form-horizontal" role="form">
  <div class="form-group">
    <label for="inputEmail1" class="col-lg-2 control-label">Email</label>
    <div class="col-lg-10">
      <input type="email" class="form-control">

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