Utilizing Bootstrap 4 for creating full-width inputs with input-group-prepend functionality

Below is the code snippet:

<div class="col-md-8 content-row-top-spacer">
  <div class="input-group">
     <div class="input-group-prepend"><span class="input-group-text">Name</span></div>
     <%= f.text_field :name, placeholder: 'Campaign Name', class: 'w-100' %>
  </div>
    <div id="campaign_name_error" class="errors_container"></div>
</div>

I want the input field to expand across its container by 100% and have the prepend display properly within the input, similar to the bootstrap demos.

However, when I run this code, I encounter the following issue:

https://i.sstatic.net/xjxfS.png

Any suggestions on how to resolve this problem?

htmlcssbootstrap-4

Answer №1

Utilize the form-control class to expand the size of the input field based on its parent container.

<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css" rel="stylesheet"/>

<h2>Example 1</h2>
<p>with col-md-8</p>
<div class="container">
  <div class="col-md-8 content-row-top-spacer">
  <div class="input-group">
     <div class="input-group-prepend"><span class="input-group-text">Name</span></div>
    <input type="text" placeholder ='Campaign Name' class='form-control'>

  </div>
    <div id="campaign_name_error" class="errors_container"></div>
</div>
</div>

<h2>Example 2</h2>
<p>with col-md-12</p>
<div class="container">
  <div class="col-md-12 content-row-top-spacer">
  <div class="input-group">
     <div class="input-group-prepend"><span class="input-group-text">Name</span></div>
    <input type="text" placeholder ='Campaign Name' class='form-control'>

  </div>
    <div id="campaign_name_error" class="errors_container"></div>
</div>
</div>
<br/>
<p>Both examples are unique, especially when viewed on a medium screen.</p>

Answer №2

If you want to style your forms, you can leverage CSS as well.

.input-group{
display: inline-block;
}

Another way to customize the appearance of your input fields is by using the following code:

<%= f.text_field :name, placeholder: 'Campaign Name', style: 'width:100%;' %>

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