Child element matching Parent's dimensions causes overflow

Question

Child element matching Parent's dimensions causes overflow

I've been searching extensively on Google, but I couldn't find an answer to why children of a parent with the same size are overflowing.

For instance,

<div style="background:blue;width:500px;height:40px">
      <div style="border:1px solid red;height:40px;font-size:0px;display:inline-block;width:30%;">
      </div>
      <div style="border:1px solid black;height:40px;font-size:0px;display:inline-block;width:70%;">
      </div>
    </div>

The code displayed above demonstrates that the first child div tag has a height of 1px more than its parent. Additionally, even when both children's percent widths add up to 100%, the parent still struggles to accommodate the two divs.

html css

Answer 1

Answer №1

Understanding the Box Model

When working with CSS, it's important to consider the box model and how borders can affect the size of your elements. Most developers now use box-sizing as a default setting.

* {
  box-sizing: border-box
}

To save yourself some headaches, I recommend familiarizing yourself with the box model.

Let's look at an example:

<div style="background:blue;width:500px;height:40px">
      <div style="box-sizing:border-box; border:1px solid red;height:40px;font-size:0px;display:inline-block;width:30%;">
      </div>
      <div style="box-sizing:border-box; border:1px solid black;height:40px;font-size:0px;display:inline-block;width:70%">
      </div>
    </div>

Tackling Inline-Block Elements

Dealing with issues related to whitespace and inline-block elements is a common challenge in web development. It's often easier to utilize flexbox or floats instead.

Using Flexbox

<div style="background:blue;width:500px;height:40px;display: flex;">
  <div style="box-sizing:border-box; border:1px solid red;height:40px;font-size:0px;width:30%;">
  </div>
  <div style="box-sizing:border-box; border:1px solid black;height:40px;font-size:0px;width:70%">
  </div>
</div>

Using Float Left

<div style="background:blue;width:500px;height:40px;/* display: flex; */">
  <div style="box-sizing:border-box;border:1px solid red;height:40px;font-size:0px;width:30%;float: left;">
  </div>
  <div style="box-sizing:border-box;border:1px solid black;height:40px;font-size:0px;width:70%;float: left;">
  </div>
</div>

Working with Inline-Block

If you must use inline-block, be prepared for some workarounds that may not completely solve your issues.

<div style="background:blue;width:500px;height:40px">
  <div style="box-sizing:border-box; border:1px solid red;height:40px;font-size:0px;display:inline-block;width:30%;">
  </div><!-- commenting out carriage return
  --><div style="box-sizing:border-box; border:1px solid black;height:40px;font-size:0px;display:inline-block;width:70%">
  </div>
</div>

Answer 2

Understanding the Box Model

When working with CSS, it's important to consider the box model and how borders can affect the size of your elements. Most developers now use box-sizing as a default setting.

* {
  box-sizing: border-box
}

To save yourself some headaches, I recommend familiarizing yourself with the box model.

Let's look at an example:

<div style="background:blue;width:500px;height:40px">
      <div style="box-sizing:border-box; border:1px solid red;height:40px;font-size:0px;display:inline-block;width:30%;">
      </div>
      <div style="box-sizing:border-box; border:1px solid black;height:40px;font-size:0px;display:inline-block;width:70%">
      </div>
    </div>

Tackling Inline-Block Elements

Dealing with issues related to whitespace and inline-block elements is a common challenge in web development. It's often easier to utilize flexbox or floats instead.

Using Flexbox

<div style="background:blue;width:500px;height:40px;display: flex;">
  <div style="box-sizing:border-box; border:1px solid red;height:40px;font-size:0px;width:30%;">
  </div>
  <div style="box-sizing:border-box; border:1px solid black;height:40px;font-size:0px;width:70%">
  </div>
</div>

Using Float Left

<div style="background:blue;width:500px;height:40px;/* display: flex; */">
  <div style="box-sizing:border-box;border:1px solid red;height:40px;font-size:0px;width:30%;float: left;">
  </div>
  <div style="box-sizing:border-box;border:1px solid black;height:40px;font-size:0px;width:70%;float: left;">
  </div>
</div>

Working with Inline-Block

If you must use inline-block, be prepared for some workarounds that may not completely solve your issues.

<div style="background:blue;width:500px;height:40px">
  <div style="box-sizing:border-box; border:1px solid red;height:40px;font-size:0px;display:inline-block;width:30%;">
  </div><!-- commenting out carriage return
  --><div style="box-sizing:border-box; border:1px solid black;height:40px;font-size:0px;display:inline-block;width:70%">
  </div>
</div>

Answer 3

Answer №2

Remember to take into account borders. In addition, the children are styled as inline-block, so they will have their own width based on the space between them. Apply box-sizing: border-box and eliminate any unnecessary spaces between blocks:

div {
  box-sizing: border-box;
}

<div style="background:yellow;width:500px;height:40px">
  <div style="border:1px solid red;height:40px;font-size:0px;display:inline-block;width:30%;">
  </div><div style="border:1px solid blue;height:40px;font-size:0px;display:inline-block;width:70%;">
  </div>
</div>

Answer 4

Remember to take into account borders. In addition, the children are styled as inline-block, so they will have their own width based on the space between them. Apply box-sizing: border-box and eliminate any unnecessary spaces between blocks:

div {
  box-sizing: border-box;
}

<div style="background:yellow;width:500px;height:40px">
  <div style="border:1px solid red;height:40px;font-size:0px;display:inline-block;width:30%;">
  </div><div style="border:1px solid blue;height:40px;font-size:0px;display:inline-block;width:70%;">
  </div>
</div>

Answer 5

Answer №3

Can you please review the following code snippet:

<div style="background-color: blue; width: 500px; height: 41px">
  <div style="border: 1px solid red; height: 40px; width: 29%; float: left;">
  </div>
  <div style="border: 1px solid black; height: 40px; width: 70%; float: left">
  </div>
</div>

Answer 6

Can you please review the following code snippet:

<div style="background-color: blue; width: 500px; height: 41px">
  <div style="border: 1px solid red; height: 40px; width: 29%; float: left;">
  </div>
  <div style="border: 1px solid black; height: 40px; width: 70%; float: left">
  </div>
</div>

Answer 7

Answer №4

If you want to fix this issue, make sure to include box-sizing: border-box in the body tag and white-space: nowrap; in the parent element. Additionally, modify the display: inline-block property of the children.

For example:

<div class="parent">
   <div class="child first"> </div>
    <div class="child second"> </div>
</div>

CSS:

body {
 -webkit-box-sizing: border-box; /* Safari/Chrome, other WebKit */
 -moz-box-sizing: border-box;    /* Firefox, other Gecko */
  box-sizing: border-box;         /* Opera/IE 8+ */
}
.parent {
  background:blue;
  width:500px;
  height:40px; 
  white-space: nowrap;
}
.first {
  width:30%;
  border:4px solid red;
  display:inline-block;
}
.second {
  width: 70%;
  border:4px solid pink;
  display: inline-block;
}
.child {
 height:40px;
 font-size:0px;
 display:inline-block;
}

Here is an example: https://jsfiddle.net/_ahmed_ab/4301hwmc/1/

Answer 8

If you want to fix this issue, make sure to include box-sizing: border-box in the body tag and white-space: nowrap; in the parent element. Additionally, modify the display: inline-block property of the children.

For example:

<div class="parent">
   <div class="child first"> </div>
    <div class="child second"> </div>
</div>

CSS:

body {
 -webkit-box-sizing: border-box; /* Safari/Chrome, other WebKit */
 -moz-box-sizing: border-box;    /* Firefox, other Gecko */
  box-sizing: border-box;         /* Opera/IE 8+ */
}
.parent {
  background:blue;
  width:500px;
  height:40px; 
  white-space: nowrap;
}
.first {
  width:30%;
  border:4px solid red;
  display:inline-block;
}
.second {
  width: 70%;
  border:4px solid pink;
  display: inline-block;
}
.child {
 height:40px;
 font-size:0px;
 display:inline-block;
}

Here is an example: https://jsfiddle.net/_ahmed_ab/4301hwmc/1/

Answer 9

Answer №5

One reason for this issue is the box-sizing CSS property. The default value is content-box, which means the element's width and height include only the content, not its padding or border.

To fix this, you can set box-sizing: border-box on the div so that the padding and border are included in the width and height of the element.

The reason your divs are not side by side is due to using display:inline-block. This creates spaces between elements, similar to words when typing. To remove the space, you can either adjust the code to eliminate gaps between the divs or set font-size:0 on the parent div and then reset font-size: initial on the child elements.

An alternative solution is to use Flexbox if browser support allows.

* {
  box-sizing: border-box;
}

<div style="background:blue;width:500px;height:40px;font-size:0;">
  <div style="border:1px solid red;height:40px;font-size:0px;display:inline-block;width:30%;">
  </div>
  <div style="border:1px solid pink;height:40px;font-size:0px;display:inline-block;width:70%;">
  </div>
</div>

Or another option is to utilize Flexbox:

* {
  box-sizing: border-box;
}

<div style="background:blue;width:500px;height:40px;display:flex;">
  <div style="border:1px solid red;height:40px;font-size:0px;display:inline-block;width:30%;">
  </div>
  <div style="border:1px solid pink;height:40px;font-size:0px;display:inline-block;width:70%;">
  </div>
</div>

Answer 10

One reason for this issue is the box-sizing CSS property. The default value is content-box, which means the element's width and height include only the content, not its padding or border.

To fix this, you can set box-sizing: border-box on the div so that the padding and border are included in the width and height of the element.

The reason your divs are not side by side is due to using display:inline-block. This creates spaces between elements, similar to words when typing. To remove the space, you can either adjust the code to eliminate gaps between the divs or set font-size:0 on the parent div and then reset font-size: initial on the child elements.

An alternative solution is to use Flexbox if browser support allows.

* {
  box-sizing: border-box;
}

<div style="background:blue;width:500px;height:40px;font-size:0;">
  <div style="border:1px solid red;height:40px;font-size:0px;display:inline-block;width:30%;">
  </div>
  <div style="border:1px solid pink;height:40px;font-size:0px;display:inline-block;width:70%;">
  </div>
</div>

Or another option is to utilize Flexbox:

* {
  box-sizing: border-box;
}

<div style="background:blue;width:500px;height:40px;display:flex;">
  <div style="border:1px solid red;height:40px;font-size:0px;display:inline-block;width:30%;">
  </div>
  <div style="border:1px solid pink;height:40px;font-size:0px;display:inline-block;width:70%;">
  </div>
</div>

Child element matching Parent's dimensions causes overflow

Answer №1

Understanding the Box Model

Tackling Inline-Block Elements

Using Flexbox

Using Float Left

Working with Inline-Block

Answer №2

Answer №3

Answer №4

Answer №5

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