http://codepen.io/anon/pen/VpqegQ
html
<div class="flex1">
<div class="flex2">
<div>one</div>
<div>two</div>
<div>three</div>
<div>four</div>
<div class="zero">
<span>Zero Text</span>
</div>
</div>
</div>
css
.flex1 {
display: flex;
overflow-x: scroll;
margin: 0 auto;
outline: 1px solid #000;
width: 300px;
}
.flex2 {
display: flex;
margin-left: auto;
border: 3px solid #00cc00;
}
.flex2 > div {
width: 50px;
height: 100px;
outline: 1px solid #cc0000;
text-align: center;
flex-shrink: 0;
}
.flex2 > .zero {
width: 0;
position: relative;
}
.flex2 > .zero > span {
position: absolute;
width: 100px;
top: 20px;
transform: translateX(-50%);
}
I'm in a situation where a zero-width element that contains an absolutely positioned element that's wider than its zero-width container that is on the edge of another container with overflow-x: scroll causes extra width to be added to the parent. Whew, what a sentence.
The outer container flex1 is 300px wide, is display: flex, and has overflow-x: scroll.
flex2 is also display: flex, and has margin-left: auto to align flex2 to the right inside flex.
flex2 correctly aligns to the right side of its container.
The problem is that the last child of flex2 is zero-width. It contains an absolutely positioned element that is wider. This then causes flex1 to display the scrollbar.
Is this expected and/or is there a way to fix it without adding overflow: hidden to flex2?
Related
This question already has answers here:
Can't scroll to top of flex item that is overflowing container
(12 answers)
Closed 4 years ago.
I must be forgetting something fundamental with my vertically and horizontally centered flexbox.
The container is within a parent with vertical scroll, and when the container becomes too tall, it grows beyond the parent top, clipping the content. The bottom stays put.
Try adjusting the height of the view or adding more lines to see it in action.
body,
html {
height: 100%;
width: 100%;
margin: 0;
}
* {
box-sizing: border-box;
}
#wrapper {
background: grey;
height: 100%;
width: 100%;
max-height: 100%;
display: flex;
overflow-y: auto;
align-items: center;
justify-content: center;
}
#box {
margin: 30px 0;
background: white;
border: 1px solid #dfdfdf;
}
<div id="wrapper">
<div id="box">
First line
<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br> Last linje
</div>
</div>
How do I keep it from getting clipped? Additionally I'm trying to have a 30px margin above and below the container.
Thanks!
You forgot nothing but you simply need to understand what is happening. First you made your wrapper to be 100% height of screen and then you made the box to be centred vertically and horizontally. When the box has a big height you will have something like this:
Now, when you add overflow-y: auto you will create a scroll that will start from the top of the wrapper until the bottom overflowed content. So it will be like this:
That's why you are able to scroll to the bottom to see the bottom part and not able to see the top part.
To avoid this, use margin:auto to center your element and in this case we will have two situations:
When box-height < wrapper-height we will have the space spread equally on each side because of the margin:auto thus your element will be centred like expected.
When box-height > wrapper-height we will have the normal behavior and your element will overflow and his top edge will stick to the top edge of the wrapper.
You may also notice the same can happen horizontally that's why I will use margin to center on both directions.
body,
html {
height: 100%;
width: 100%;
margin: 0;
}
* {
box-sizing: border-box;
}
#wrapper {
background: grey;
height: 100%;
width: 100%;
max-height: 100%;
padding:30px 0;
display: flex;
overflow-y: auto;
}
#box {
margin: auto;
background: white;
border: 1px solid #dfdfdf;
}
<div id="wrapper">
<div id="box">
First line
<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br> Last linje
</div>
</div>
I think what you want is to make your flex item (#box) have a height and set it's overflow, not the flex container. Also, to add your 30px above and below I would remove the margin from the box and instead add padding to the container.
So, updated styles would look like this:
#wrapper {
background: grey;
height: 100%;
width: 100%;
max-height: 100%;
display: flex;
align-items: center;
justify-content: center;
padding: 30px 0; /*added*/
}
#box {
background: white;
border: 1px solid #dfdfdf;
overflow-y: auto; /*added*/
height: 100%; /*added*/
}
body,
html {
height: 100%;
width: 100%;
margin: 0;
}
* {
box-sizing: border-box;
}
#wrapper {
background: grey;
height: 100%;
width: 100%;
max-height: 100%;
display: flex;
align-items: center;
justify-content: center;
padding: 30px 0;
}
#box {
background: white;
border: 1px solid #dfdfdf;
overflow-y: auto;
height: 100%;
}
<div id="wrapper">
<div id="box">
First line
<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br> Last linje
</div>
</div>
I think you set the top margin in the box class which extends the height of the container. You can maybe set it to padding instead of margin. Hope this helps. Thanks.
There are lots of card to be showed and I need to show menu when I hover one of the cards.
I use position: absolute; for menu and use position: relative; for the card, but why the scrollbar appeared when I hover on the card ？
<!DOCTYPE html>
<html>
<head>
<style>
.box {
height: 240px;
width: 200px;
overflow: auto;
border: 1px dashed red;
}
.card {
height: 120px;
width: 120px;
border: 1px solid blue;
position: relative;
}
.menu {
display: none;
height: 400px;
width: 200px;
position: absolute;
top: 0;
left: 0;
background: linear-gradient(orange, pink);
}
.card:hover .menu {
display: block;
}
</style>
</head>
<body>
<div class="box">
<div class="card">
<div class="menu"></div>
</div>
</div>
</body>
</html>
The scrollbar has nothing to do with your positioning, it is a result of overflow: auto; on your .box element.
overflow: auto; will show a scrolling bar if a child element overflows its parent container where overflow: auto; is set.
Seeing as the .box parent-element has a fixed size value height: 240px; while its child element .menu has height: 400px;, it will cause a scrollbar to appear because there is an overflow of 160px.
While #Yong is correct with document flow in his answer with the position: absolute; property, seeing as you have fixed height and width on all your elements, position: absolute; doesn't actually do anything in this exact reproducible example.
If I understand your problem correctly, a simple solution to your problem if you want to keep the fixed width and height on your .box element, you can simply disable the scrollbar by applying display: none; to the .box pseudo-element ::-webkit-scrollbar.
(NOTE: As of February 28th, 2022 this is still not supported in Firefox).
Read more about browser support at https://caniuse.com/?search=%3A%3A-webkit-scrollbar
Example with no positioning properties & -::webkit-scrollbar
.box {
height: 240px;
width: 200px;
border: 1px dashed red;
overflow: auto;
}
.box::-webkit-scrollbar{
display: none;
}
.card {
height: 120px;
width: 120px;
border: 1px solid blue;
/*position: relative;*/
}
.menu {
display: none;
height: 400px;
width: 200px;
/*position: absolute;
top: 0;
left: 0;*/
background: linear-gradient(orange, pink);
}
.card:hover .menu {
display: block;
}
<!DOCTYPE html>
<html>
<body>
<div class="box">
<div class="card">
<div class="menu"></div>
</div>
</div>
</body>
</html>
If you want to remove overflow altogether, you can apply overflow: hidden; to .box.
Keep in mind the fixed height of 400px on the .menu element will not apply as the fixed height of 240px on the .box element will hide the remaining 160px. I hope this solves your problem, but a little more detail would help!
absolute
The element is removed from the normal document flow, and no space is
created for the element in the page layout. It is positioned relative
to its closest positioned ancestor, if any; otherwise, it is placed
relative to the initial containing block. -MDN
.menu is positioned absolute therefore it is positioned relative to .card which is the closes positioned ancestor to it.
relative
The element is positioned according to the normal flow of the
document, ... -MDN
And because .card is positioned relative it would still take space and position according to the normal flow of the document. Therefore, it would still be taken into consideration whether the .box or its parent would overflow or not.
with set position: absolute; for .menu and position: relative; for .card you able to change the position of .menu with top bottom left right properties relative to its first positioned (not static) ancestor element( .card position ).
but in your question, the absolute or relative position is not the cause of the scrollbar appear . The reason is the owerflow property .
the default value for owerflow is visible that create no owerflowing . And you created the scrollbar by setting it auto because the size of menu is larger than card.
.box {
height: 240px;
width: 200px;
/* overflow: auto; */
border: 1px dashed red;
}
.card {
height: 120px;
width: 120px;
border: 1px solid blue;
position: relative;
}
.menu {
display: none;
height: 400px;
width: 200px;
position: absolute;
top: 0;
left: 0;
background: linear-gradient(orange, pink);
}
.card:hover .menu {
display: block;
}
<div class="box">
<div class="card">
<div class="menu"></div>
</div>
</div>
This question already has answers here:
Can't scroll to top of flex item that is overflowing container
(12 answers)
Closed 4 years ago.
I must be forgetting something fundamental with my vertically and horizontally centered flexbox.
The container is within a parent with vertical scroll, and when the container becomes too tall, it grows beyond the parent top, clipping the content. The bottom stays put.
Try adjusting the height of the view or adding more lines to see it in action.
body,
html {
height: 100%;
width: 100%;
margin: 0;
}
* {
box-sizing: border-box;
}
#wrapper {
background: grey;
height: 100%;
width: 100%;
max-height: 100%;
display: flex;
overflow-y: auto;
align-items: center;
justify-content: center;
}
#box {
margin: 30px 0;
background: white;
border: 1px solid #dfdfdf;
}
<div id="wrapper">
<div id="box">
First line
<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br> Last linje
</div>
</div>
How do I keep it from getting clipped? Additionally I'm trying to have a 30px margin above and below the container.
Thanks!
You forgot nothing but you simply need to understand what is happening. First you made your wrapper to be 100% height of screen and then you made the box to be centred vertically and horizontally. When the box has a big height you will have something like this:
Now, when you add overflow-y: auto you will create a scroll that will start from the top of the wrapper until the bottom overflowed content. So it will be like this:
That's why you are able to scroll to the bottom to see the bottom part and not able to see the top part.
To avoid this, use margin:auto to center your element and in this case we will have two situations:
When box-height < wrapper-height we will have the space spread equally on each side because of the margin:auto thus your element will be centred like expected.
When box-height > wrapper-height we will have the normal behavior and your element will overflow and his top edge will stick to the top edge of the wrapper.
You may also notice the same can happen horizontally that's why I will use margin to center on both directions.
body,
html {
height: 100%;
width: 100%;
margin: 0;
}
* {
box-sizing: border-box;
}
#wrapper {
background: grey;
height: 100%;
width: 100%;
max-height: 100%;
padding:30px 0;
display: flex;
overflow-y: auto;
}
#box {
margin: auto;
background: white;
border: 1px solid #dfdfdf;
}
<div id="wrapper">
<div id="box">
First line
<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br> Last linje
</div>
</div>
I think what you want is to make your flex item (#box) have a height and set it's overflow, not the flex container. Also, to add your 30px above and below I would remove the margin from the box and instead add padding to the container.
So, updated styles would look like this:
#wrapper {
background: grey;
height: 100%;
width: 100%;
max-height: 100%;
display: flex;
align-items: center;
justify-content: center;
padding: 30px 0; /*added*/
}
#box {
background: white;
border: 1px solid #dfdfdf;
overflow-y: auto; /*added*/
height: 100%; /*added*/
}
body,
html {
height: 100%;
width: 100%;
margin: 0;
}
* {
box-sizing: border-box;
}
#wrapper {
background: grey;
height: 100%;
width: 100%;
max-height: 100%;
display: flex;
align-items: center;
justify-content: center;
padding: 30px 0;
}
#box {
background: white;
border: 1px solid #dfdfdf;
overflow-y: auto;
height: 100%;
}
<div id="wrapper">
<div id="box">
First line
<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br>line<br> Last linje
</div>
</div>
I think you set the top margin in the box class which extends the height of the container. You can maybe set it to padding instead of margin. Hope this helps. Thanks.
I have wrapper orange div that has known height, e.g. 200px.
I have bottom red div that has unknown height, e.g. textarea that can be resizable depending on text inside.
The rest space besides div is taken by a blue div, that has a scroll.
Well I want to place an absolute green div right above of the red div. I don't know its height. This div should have z-index more than the blue div, and be on its bottom.
Well:
I can't use bottom: Npx and place green div in the same container as the red div. since I don't know the size of red div and.
I can't use top: Npx and place in the same container as orange div, since the known height of 200px of wrapper (orange div) can be shrunken if device height is lesser than 200px.
I can't place it inside of blue div and make it bottom: 0, since it has a scroll.
.wrapper {
background-color: #ff8000;
height: 150px;
display: flex;
position: relative;
padding: 10px;
flex-direction: column;
}
.unkown-height-top {
background-color: #00ff00;
position: absolute;
width: calc(100% - 20px);
bottom: 40px; /* I don't know the size of bottom div here */
height: 50px; /* random*/
}
.unkown-height-bottom {
background-color: #ff0000;
height: 40px; /* random */
flex-shrink: 0;
}
.top-bellow {
flex-shrink: 1;
overflow-y: scroll;
background-color: blue;
}
<div class="wrapper">
<div class="top-bellow">
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br></div>
<div class="unkown-height-top"></div>
<div class="unkown-height-bottom"></div>
</div>
You can place it inside the red div and use bottom:100%
.wrapper {
background-color: #ff8000;
height: 150px;
display: flex;
padding: 10px;
flex-direction: column;
}
.unkown-height-top {
background-color: #00ff00;
position: absolute;
width: 100%;
bottom: 100%;
height: 50px; /* random*/
}
.unkown-height-bottom {
background-color: #ff0000;
height: 40px; /* random */
flex-shrink: 0;
position: relative;
}
.top-bellow {
flex-shrink: 1;
overflow-y: scroll;
background-color: blue;
}
<div class="wrapper">
<div class="top-bellow">
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br></div>
<div class="unkown-height-bottom">
<div class="unkown-height-top"></div>
</div>
</div>
I have:
.container {
display:flex;
align-items:center
}
.content {
flex-grow:1
}
in order to align the .content div vertically with css only. The content changes dynamically and that's why I can't use position:absolute; margin-top:50%... styling. Because I never know the exact height of div on each content update.
But in a scenario where .container width changes but height remains, .content overflows .container top because it wraps the text within.
What I'm trying to do is never let .content exceed the top position less than 0. Even the most ideal situation will be preserving the padding-top value of .container and margin-top value of .content. Overflowing bottom will be OK, in fact it'll be my preference.
Any workarounds?
You can make .container height flexible: use min-height instead of height.
.container {
display: flex;
align-items:center;
min-height: 75px;
border: 3px solid blue;
}
.content {
height: 150px;
flex-grow: 1;
border: 3px solid red;
resize: vertical;
overflow: auto;
}
<div class="container">
<div class="content"></div>
</div>
Another possibility is using overflow: auto. However, instead of centering using align-items:center, use margin: auto 0.
.container {
display: flex;
height: 75px;
border: 3px solid blue;
overflow: auto;
resize: vertical;
}
.content {
height: 150px;
flex-grow: 1;
margin: auto 0;
border: 3px solid red;
}
<div class="container">
<div class="content"></div>
</div>