Discover the method used to determine the vertical dimensions of a button

Check out my code snippet (here):

<div class="modal-body">
  <div class="container">
    <div class="row">
      <div class="col-8 p-0">
        <form class="form-group">
          <form>
            <input type="text" class="form-control w-100 pr-0 mr-0" id="quick-add-task-control-text-area" placeholder="Task name">
          </form>
        </form>
      </div>
      <div class="col-4 p-0">
        <button type="button" class="btn btn-secondary w-100 h-100 ml-0" id="schedule-button">Schedule</button>
      </div>

    </div>
  </div>
  <div class="modal-footer d-flex flex-row justify-content-start pl-0">

    <button type="button" class="btn btn-primary btn-sm" id="add-task-modal-save">Save changes</button>

    <div class="input-group mb-0 w-50">
      <div class="input-group-prepend">
        <label class="input-group-text" for="inputGroupSelectPriority">Priority</label>
      </div>
      <select class="custom-select" id="inputGroupSelectPriority">
        <option selected>Choose...</option>
        <option value="Low">Low</option>
        <option value="Medium">Medium</option>
        <option value="High">High</option>
      </select>
    </div>


  </div>
</div>
</div>
</div>

When I initiated the modal from the navbar with the "+" icon, I noticed that my input-group's height didn't match the "save changes" button on the left. Despite investigating the styles, I couldn't determine how the button's height was calculated. Lacking references like em, rem, or parent elements, I resorted to setting the height in pixels, which I know is not ideal. So, my inquiry is, how can I properly set the height of the input-group element in a responsive-friendly manner?

(Regarding the modal footer, I opted not to include a container, row, and columns as I did in the body section. Is this approach considered bad practice?)

Answer №1

The height of the button in Bootstrap is dynamically calculated based on its content, margin, padding, and border. In contrast, the custom select element has a fixed height that cannot be easily adjusted without overriding its properties along with those of its label.

While customizing Bootstrap styles can be challenging, especially when trying to create unique designs, some components like the grid system can still be useful. Consider creating a custom input element and utilizing flexbox for automatic sizing instead.

If you want to make the select element smaller, you can add h-100 to achieve the desired height. Keep in mind that adjusting the height may also require modifying padding or font size to ensure the text remains visible.

Answer №2

When working on projects that utilize Bootstrap, it's important to note that any element with the class d-flex becomes a flexbox container, thereby turning its immediate child elements into flex items.

One interesting aspect of flexbox is how it can significantly impact the height of items when the flex-direction property is set to row (which is the default). In this case, the items will naturally expand to the height of the flexbox container.

While adding a fixed height to items may provide a solution, it might be more practical to enclose elements like <select> and <button> within a wrapper div. This way, the wrapper can be influenced by the flexbox container's height changes while the <select> maintains its original height.

For more in-depth information on how flexbox operates, check out this helpful resource.

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