The button's height exceeds the height of the nested content

Question

The button's height exceeds the height of the nested content

Currently, I am utilizing bootstrap 4 alpha version.

<button class="btn btn-link p-0">
  <div style="display:inline-block; background-color:#c2f5ff; width: 100px; height: 100px;">
  </div>
 </button>

Check out the Fiddle here

In my code, I have intricately nested a div within a button element. The dimensions of the div are set with specific values for both its height and width. The width of the button perfectly accommodates the div, however, the height of the button seems to be unnecessarily larger than expected. Additionally, upon clicking the button, it reveals that the blue outline surrounding the button does not align properly with the content inside.

I'm puzzled by this unexpected behavior - why is this happening?

html css bootstrap-4

Answer 1

Answer №1

The reason for this is because of the nature of inline-block. The inner div of the button is set to inline-block, which has a default value of vertical-align: baseline causing an extra gap. If you change the vertical-align value of your div to something other than baseline (such as top, middle, or bottom), the button will have the expected size of 102x102 (content width + 1px borders).

This explanation about vertical-align: baseline can be found in this answer:

Since browsers typically set the vertical-align property to baseline by default, this behavior is normal. Refer to the image below to see where the baseline falls on text:

Elements aligned to the baseline must reserve space for characters with descenders that extend below the baseline (like the letters j, p, or g), as shown in the image above.

To achieve the desired outcome, simply remove the display: inline-block from your inner div.

Answer 2

The reason for this is because of the nature of inline-block. The inner div of the button is set to inline-block, which has a default value of vertical-align: baseline causing an extra gap. If you change the vertical-align value of your div to something other than baseline (such as top, middle, or bottom), the button will have the expected size of 102x102 (content width + 1px borders).

This explanation about vertical-align: baseline can be found in this answer:

Since browsers typically set the vertical-align property to baseline by default, this behavior is normal. Refer to the image below to see where the baseline falls on text:

Elements aligned to the baseline must reserve space for characters with descenders that extend below the baseline (like the letters j, p, or g), as shown in the image above.

To achieve the desired outcome, simply remove the display: inline-block from your inner div.

Answer 3

Answer №2

To remove the white padding inside the button, you can simply eliminate the border: none property on the button and modify the display type of the div inside from display: inline-block to display: block.

I trust this solution will be beneficial for you!

Answer 4

To remove the white padding inside the button, you can simply eliminate the border: none property on the button and modify the display type of the div inside from display: inline-block to display: block.

I trust this solution will be beneficial for you!

Answer 5

Answer №3

To put it simply, the button is not exactly 100px wide or high.

The key is to first determine the size of the button, and then ensure that the inner div fills the button completely.

body {
    margin: 10px;
}

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" rel="stylesheet"/>

<button class="btn btn-link p-0" style="border-style:none;width:100px;height:100px;">
  <div style="background-color:#c2f5ff; width: 100%; height: 100%;">
  </div>
 </button>

This can be achieved by setting width:100px and height:100px on the button itself, and ensuring that the inner div expands to fit using width:100% and height:100%.

Additionally, there is a thin 1px-wide border around the button that can be removed with border-style:none

Answer 6

To put it simply, the button is not exactly 100px wide or high.

The key is to first determine the size of the button, and then ensure that the inner div fills the button completely.

body {
    margin: 10px;
}

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" rel="stylesheet"/>

<button class="btn btn-link p-0" style="border-style:none;width:100px;height:100px;">
  <div style="background-color:#c2f5ff; width: 100%; height: 100%;">
  </div>
 </button>

This can be achieved by setting width:100px and height:100px on the button itself, and ensuring that the inner div expands to fit using width:100% and height:100%.

Additionally, there is a thin 1px-wide border around the button that can be removed with border-style:none

Answer 7

Answer №4

It may seem unconventional to have a div within a button, but here is how I approached it:

I defined the width and height of the button itself, then set the width and height of the nested div to 100%. This way, the nested div matches the size of the button.

You can view the code on this jsfiddle link.

Answer 8

It may seem unconventional to have a div within a button, but here is how I approached it:

I defined the width and height of the button itself, then set the width and height of the nested div to 100%. This way, the nested div matches the size of the button.

You can view the code on this jsfiddle link.

The button's height exceeds the height of the nested content

Answer №1

Answer №2

Answer №3

Answer №4

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