Grid item won't take full height of parent container - html

Question

I am trying to create three items inside of a nested grid item. As you can see from the code, I've put the 'panels' div in-between the 'jumbo' and 'content' divs. I also nested three divs inside. In the CSS, I added a nested grid inside of .panels.
I want the 'panels' div to be split in three equally size parts on the vertical axis. Imagine three square blocks stack one after another. But the nested items don't fill the entire 'panels' div. If you run the code snippet, you can see that the panels are nested but don't take up the entire space. They take up a small percentage of their parent. I added background-color: white !important to one of the nested panels to show how small it is.
Another example can be seen here: https://codepen.io/rachelandrew/pen/NqQPBR/
But again, the nested E, F and G items don't expand to fill up the entire D section.
Is there a way to make the three panels fill in their parent?
.container {
display: grid;
width: 100%;
height: 100%;
grid-gap: 3px;
grid-template-columns: repeat(10, 1fr);
grid-template-rows: 40px 130px 130px 130px 60px 330px 40px;
}
.header {
grid-column: 1 / -1;
}
.jumbo {
grid-column: 1 / -1;
grid-row: 2 / 5;
}
.panels {
grid-column: 3 / 9;
grid-row: 4 / 6;
z-index: 1;
display: grid;
grid-template-columns: repeat(3, 1fr);
}
.panel1 {
grid-row: 1 / 2;
grid-row: 1;
background-color: white !important;
z-index: 2;
}
.content {
grid-column: 1 / -1;
grid-row: 5 / 7;
}
.footer {
grid-column: 1 / -1;
}
/* Styling */
.container > div {
display: grid;
justify-content: center;
align-items: center;
font-size: 2em;
color: #ffeead;
}
html, body {
background-color: #ffeead;
box-sizing: border-box;
height: 100%;
margin: 0px;
font-family: "Work Sans"
}
.container > div:nth-child(1n) {
background-color: #96ceb4;
}
.container > div:nth-child(3n) {
background-color: #88d8b0;
}
.container > div:nth-child(2n) {
background-color: #ff6f69;
}
.container > div:nth-child(4n) {
background-color: #ffcc5c;
}
.panels > div:nth-child(1n) {
background-color: #96ceb4;
}
<div class="container">
<div class="header">
HEADER
</div>
<div class="jumbo">
JUMBO
</div>
<div class="panels">
<div class="panel1">PANEL1</div>
<div class="panel2">PANEL2</div>
<div class="panel3">PANEL3</div>
</div>
<div class="content">
CONTENT
</div>
<div class="footer">
FOOTER
</div>
</div>

Answer 1

You have align-items: center applied to the nested grid container (.panels).
With that rule, you override the default align-items: stretch, which would set your grid items to the full height of the parent. Instead, you have the items vertically centered.
So they can be full height, remove align-items: center from the .panels element:
.container > div:not(.panels) {
align-items: center;
}
.container {
display: grid;
width: 100%;
height: 100%;
grid-gap: 3px;
grid-template-columns: repeat(10, 1fr);
grid-template-rows: 40px 130px 130px 130px 60px 330px 40px;
}
.header {
grid-column: 1 / -1;
}
.jumbo {
grid-column: 1 / -1;
grid-row: 2 / 5;
}
.panels {
grid-column: 3 / 9;
grid-row: 4 / 6;
z-index: 1;
display: grid;
grid-template-columns: repeat(3, 1fr);
}
.panel1 {
grid-row: 1 / 2;
grid-row: 1;
background-color: white !important;
z-index: 2;
}
.content {
grid-column: 1 / -1;
grid-row: 5 / 7;
}
.footer {
grid-column: 1 / -1;
}
/* Styling */
.container > div {
display: grid;
justify-content: center;
/* align-items: center; */
font-size: 2em;
color: #ffeead;
}
/* new */
.container > div:not(.panels) {
align-items: center;
}
html, body {
background-color: #ffeead;
box-sizing: border-box;
height: 100%;
margin: 0px;
font-family: "Work Sans"
}
.container > div:nth-child(1n) { background-color: #96ceb4; }
.container > div:nth-child(3n) { background-color: #88d8b0; }
.container > div:nth-child(2n) { background-color: #ff6f69; }
.container > div:nth-child(4n) { background-color: #ffcc5c; }
.panels > div:nth-child(1n) { background-color: #96ceb4; }
<div class="container">
<div class="header">HEADER</div>
<div class="jumbo">JUMBO</div>
<div class="panels">
<div class="panel1">PANEL1</div>
<div class="panel2">PANEL2</div>
<div class="panel3">PANEL3</div>
</div>
<div class="content">CONTENT</div>
<div class="footer">FOOTER</div>
</div>
Then, to vertically center the content of .panels, I would target the content directly:
.panels > div {
display: flex;
align-items: center;
}
.container {
display: grid;
width: 100%;
height: 100%;
grid-gap: 3px;
grid-template-columns: repeat(10, 1fr);
grid-template-rows: 40px 130px 130px 130px 60px 330px 40px;
}
.header {
grid-column: 1 / -1;
}
.jumbo {
grid-column: 1 / -1;
grid-row: 2 / 5;
}
.panels {
grid-column: 3 / 9;
grid-row: 4 / 6;
z-index: 1;
display: grid;
grid-template-columns: repeat(3, 1fr);
}
.panel1 {
grid-row: 1 / 2;
grid-row: 1;
background-color: white !important;
z-index: 2;
}
.content {
grid-column: 1 / -1;
grid-row: 5 / 7;
}
.footer {
grid-column: 1 / -1;
}
/* Styling */
.container > div {
display: grid;
justify-content: center;
/* align-items: center; */
font-size: 2em;
color: #ffeead;
}
/* new */
.container > div:not(.panels) {
align-items: center;
}
/* new */
.panels > div {
display: flex;
align-items: center;
}
html, body {
background-color: #ffeead;
box-sizing: border-box;
height: 100%;
margin: 0px;
font-family: "Work Sans"
}
.container > div:nth-child(1n) { background-color: #96ceb4; }
.container > div:nth-child(3n) { background-color: #88d8b0; }
.container > div:nth-child(2n) { background-color: #ff6f69; }
.container > div:nth-child(4n) { background-color: #ffcc5c; }
.panels > div:nth-child(1n) { background-color: #96ceb4; }
<div class="container">
<div class="header">HEADER</div>
<div class="jumbo">JUMBO</div>
<div class="panels">
<div class="panel1">PANEL1</div>
<div class="panel2">PANEL2</div>
<div class="panel3">PANEL3</div>
</div>
<div class="content">CONTENT</div>
<div class="footer">FOOTER</div>
</div>
Keep in mind that there are three structural levels in a grid container:
the container
the item (child of the container)
the content (child of the item)
Grid properties only work between parent and child.
So when you apply grid centering properties on the container, they apply to the item, not the content. To center the content, you need to treat the item as parent and content as child.
There's a more in-depth explanation of these concepts and methods here: Centering in CSS Grid

Answer 2

Well, what you have done is, you created three columns inside the 'panels' div:
grid-template-columns: repeat(3, 1fr);
But you gave the children only a position for the row (twice):
grid-row: 1 / 2;
grid-row: 1;
So if you change 'columns' to 'rows' in '.panels' and clean up the code for '.panel1' it should work like a cham!

Answer 3

Thank you all for your suggestions. I solved the issue by removing the nested 'panel' and simply creating three different panels to fill the same space.
.container {
display: grid;
width: 100%;
height: 100%;
grid-gap: 3px;
grid-template-columns: repeat(13, 1fr);
grid-template-rows: 50px 218px 218px 200px 80px 530px 40px;
}
.header {
grid-column: 1 / -1;
position: sticky;
top: 0;
z-index: 3;
}
.jumbo {
grid-column: 1 / -1;
grid-row: 2 / 5;
}
.panel1 {
background-color: white !important;
z-index: 1;
grid-column: 3 / 6;
grid-row: 4 / 6;
}
.panel2 {
background-color: black !important;
z-index: 1;
grid-column: 6 / 9;
grid-row: 4 / 6;
}
.panel3 {
background-color: purple !important;
z-index: 2;
grid-column: 9 / 12;
grid-row: 4 / 6;
}
.content-left {
grid-column: 1 / 5;
grid-row: 5 / 7;
}
.content-right {
grid-column: 5 / -1;
grid-row: 5 / 7;
display: grid;
grid-gap: 5px;
align-items: start;
grid-template-columns: repeat(3, 1fr);
grid-template-rows: repeat(2, 1fr)
}
.content-right > div {
background-color: white;
z-index: 2;
}
.footer {
grid-column: 1 / -1;
}
.container > div {
justify-content: center;
align-items: center;
font-size: 2em;
color: #ffeead;
}
html, body {
background-color: #ffeead;
box-sizing: border-box;
height: 100%;
margin: 0px;
font-family: "Work Sans"
}
.container > div:nth-child(1n) {
background-color: #96ceb4;
}
.container > div:nth-child(3n) {
background-color: #88d8b0;
}
.container > div:nth-child(2n) {
background-color: #ff6f69;
}
.container > div:nth-child(4n) {
background-color: #ffcc5c;
}
.panels > div:nth-child(1n) {
background-color: #96ceb4;
}
<div class="container">
<div class="header">
HEADER
</div>
<div class="jumbo">
JUMBO
</div>
<div class="panel1">PANEL1</div>
<div class="panel2">PANEL2</div>
<div class="panel3">PANEL3</div>
<div class="content-left">
CONTENT-LEFT
</div>
<div class="content-right">
<div class="content-right1">1</div>
<div class="content-right2">2</div>
<div class="content-right3">3</div>
<div class="content-right4">4</div>
<div class="content-right5">5</div>
<div class="content-right6">6</div>
</div>
<div class="footer">
FOOTER
</div>
</div>