Inline-block display for file input button in Bootstrap 4 style

I have added an input file button and I am trying to make it full width using display:block. Even after hiding the input field, I am not seeing any difference. Here is the relevant code snippet:

<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
<form method='POST' action='' enctype='mutlipart/form-data'>
  <label for="uploadAvatar">
                    <p style="display:block" class="btn btn-secondary btn-sm mt-3">Upload new avatar</p>
                    <input type="file" id="uploadAvatar" name="uploadAvatar" style="display:none">
                </label>
</form>

htmlcssformsbootstrap-4

Answer №1

It seems like you forgot to include the display style properties in your HTML code. By default, all form elements in Bootstrap have the properties display: block and width: 100%.

Additionally, you have the option to utilize the native Bootstrap 4 class utilities, such as:

d-block : to display any element as a block btn-block : to display a button element or an element with the btn class as a block.

<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" rel="stylesheet"/>


<form>
  <div class="form-group">
    <label for="exampleFormControlFile1">Example file input</label>
    <input type="file" class="form-control-file" id="exampleFormControlFile1" style="border: 1px solid #000;">
  </div>
</form>


<form method='POST' action='' enctype='mutlipart/form-data'>
  <label for="uploadAvatar" class="d-block">
    <p class="btn btn-secondary btn-block btn-sm mt-3">Upload new avatar</p>
    <input type="file" id="uploadAvatar" name="uploadAvatar" style="display:none">
  </label>
</form>

Answer №2

You have the option to assign col-12 to the label element.

<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
<form method='POST' action='' enctype='mutlipart/form-data'>
  <label for="uploadAvatar" class="col-12">
                    <p style="display:block" class="btn btn-secondary btn-sm mt-3">Click here to upload a new avatar</p>
                    <input type="file" id="uploadAvatar" name="uploadAvatar" style="display:none">
                </label>
</form>

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