Browser modify centered div while zooming - html

I'm trying to center a circle in another circle using 2 divs. And I noticed that at some zoom levels the width and the height shown in browser are different from what I specified. I have a 50px x 50px div and after zoom sometimes it gets smth like 49.992 x 49.992.
.outer {
position: relative;
width: 100px;
height: 100px;
background: #7154d4;
display: flex;
justify-content: center;
align-items: center;
}
.inner {
background: #ff00ff;
width: 50px;
height: 50px;
margin-left: auto;
margin-right: auto;
}
div {
border-radius: 50%;
}
<div class="outer">
<div class="inner"></div>
</div>
Is this something normal or is there a way to not let this happen?
Tested on Chrome and Firefox.
Here is a testing link: https://codepen.io/StefanAlif/pen/RwMwrMj

Remove margin-left:auto and margin-right:auto from .inner class
and
Add position:absolute to .inner class
This will work.
.outer {
position: relative;
width: 100px;
height: 100px;
background: #7154d4;
display: flex;
justify-content: center;
align-items: center;
}
.inner {
background: #ff00ff;
width: 50px;
height: 50px;
position: absolute;
}
div {
border-radius: 50%;
}
<div class="outer">
<div class="inner"></div>
</div>

Related

How to set a child's height to 100% of a parent element using Flexbox?

I'm currently having an issue where whenever I attempt to have a child take up 100% of the remaining height of a container, the child's height expands way past the border of the parent.
HTML
.container {
height: 340px;
/* background-image: url(../images/topo-bg-3-black.png);
background-position: center;
background-size: cover;
background-repeat: no-repeat; */
background-color: #DDDEDA;
display: flex;
align-items: center;
justify-content: center;
}
.container-wrap {
height: 200px;
display: flex;
align-items: center;
justify-content: space-evenly;
}
.content {
height: 100%;
width: 171px;
background-color: aqua;
}
.content-pic {
width: 100%;
height: 115px;
background-color: green;
margin-top: 5px;
}
.content-text {
background-color: red;
height: 100%;
width: 100%;
}
<div class="container">
<div class="container-wrap">
<div class="content">
5 HOURS AGO
<div class="content-pic"></div>
<div class="content-text"></div>
</div>
</div>
</div>
The JSFiddle containing my code is here.
I've attempted using align-items: stretch; as well as the position property as other threads have suggested to no avail. The width takes up 100% of the container just fine, but the height doesn't, and I'm a bit stuck on what to do.
I collected two solutions for you.
The first one(As I said in the comment area) is to using overflow: hidden to hide the overflow part of the element:
.content {
height: 100%;
width: 171px;
background-color: aqua;
overflow: hidden;
}
The second one is solve this problem completely, I determined that the content-pic of its height you are using is 115px but not percent, so the thing will overflow, so here is the solution:
.content-pic {
width: 100%;
height: 115px;
background-color: green;
margin-top: 5px;
}
.content-text {
background-color: red;
height: calc(100ph - 115px);
width: 100%;
}
The reason why it will overflow at the beginning is that you put two elements, one has 115px size, and another has 100% size, so the second one's top position is 115px while the width is still 100%.
In that case, I change width:100% into calc(100ph - 115px). 100ph is similar to 100%, and 115px is the height of content-pic.
Furthermore, please using span instead of using nothing because if you do not do that, it will not work in some case.
This is the whole code(For the second solution):
.container {
height: 340px;
background-color: #DDDEDA;
display: flex;
align-items: center;
justify-content: center;
}
.container-wrap {
height: 200px;
display: flex;
align-items: center;
justify-content: space-evenly;
}
.content {
height: 100%;
width: 171px;
background-color: aqua;
}
.content-pic {
width: 100%;
height: 115px;
background-color: green;
margin-top: 5px;
}
.content-text {
background-color: red;
height: calc(100% - 115px);
width: 100%;
}
<div class="container">
<div class="container-wrap">
<div class="content">
<span>
5 HOURS AGO
</span>
<div class="content-pic"></div>
<div class="content-text"></div>
</div>
</div>
</div>

Center image in broswer window [duplicate]

I am trying to center my tabs content vertically, but when I add the CSS style display:inline-flex, the horizontal text-align disappears.
How can I make both text alignments x and y for each of my tabs?
* { box-sizing: border-box; }
#leftFrame {
background-color: green;
position: absolute;
left: 0;
right: 60%;
top: 0;
bottom: 0;
}
#leftFrame #tabs {
background-color: red;
position: absolute;
top: 0;
left: 0;
right: 0;
height: 25%;
}
#leftFrame #tabs div {
border: 2px solid black;
position: static;
float: left;
width: 50%;
height: 100%;
text-align: center;
display: inline-flex;
align-items: center;
}
<div id=leftFrame>
<div id=tabs>
<div>first</div>
<div>second</div>
</div>
</div>
Approach 1 - transform translateX/translateY:
Example Here / Full Screen Example
In supported browsers (most of them), you can use top: 50%/left: 50% in combination with translateX(-50%) translateY(-50%) to dynamically vertically/horizontally center the element.
.container {
position: absolute;
top: 50%;
left: 50%;
-moz-transform: translateX(-50%) translateY(-50%);
-webkit-transform: translateX(-50%) translateY(-50%);
transform: translateX(-50%) translateY(-50%);
}
<div class="container">
<span>I'm vertically/horizontally centered!</span>
</div>
Approach 2 - Flexbox method:
Example Here / Full Screen Example
In supported browsers, set the display of the targeted element to flex and use align-items: center for vertical centering and justify-content: center for horizontal centering. Just don't forget to add vendor prefixes for additional browser support (see example). Remember the parent container will also need height (in this case, 100%).
html, body, .container {
height: 100%;
}
.container {
display: -webkit-flexbox;
display: -ms-flexbox;
display: -webkit-flex;
display: flex;
-webkit-flex-align: center;
-ms-flex-align: center;
-webkit-align-items: center;
align-items: center;
justify-content: center;
}
<div class="container">
<span>I'm vertically/horizontally centered!</span>
</div>
Approach 3 - table-cell/vertical-align: middle:
Example Here / Full Screen Example
In some cases, you will need to ensure that the html/body element's height is set to 100%.
For vertical alignment, set the parent element's width/height to 100% and add display: table. Then for the child element, change the display to table-cell and add vertical-align: middle.
For horizontal centering, you could either add text-align: center to center the text and any other inline children elements. Alternatively, you could use margin: 0 auto, assuming the element is block level.
html, body {
height: 100%;
}
.parent {
width: 100%;
height: 100%;
display: table;
text-align: center;
}
.parent > .child {
display: table-cell;
vertical-align: middle;
}
<section class="parent">
<div class="child">I'm vertically/horizontally centered!</div>
</section>
Approach 4 - Absolutely positioned 50% from the top with displacement:
Example Here / Full Screen Example
This approach assumes that the text has a known height - in this instance, 18px. Just absolutely position the element 50% from the top, relative to the parent element. Use a negative margin-top value that is half of the element's known height, in this case - -9px.
html, body, .container {
height: 100%;
}
.container {
position: relative;
text-align: center;
}
.container > p {
position: absolute;
top: 50%;
left: 0;
right: 0;
margin-top: -9px;
}
<div class="container">
<p>I'm vertically/horizontally centered!</p>
</div>
Approach 5 - The line-height method (Least flexible - not suggested):
Example Here
In some cases, the parent element will have a fixed height. For vertical centering, all you have to do is set a line-height value on the child element equal to the fixed height of the parent element.
Though this solution will work in some cases, it's worth noting that it won't work when there are multiple lines of text - like this.
.parent {
height: 200px;
width: 400px;
background: lightgray;
text-align: center;
}
.parent > .child {
line-height: 200px;
}
<div class="parent">
<span class="child">I'm vertically/horizontally centered!</span>
</div>
If CSS3 is an option (or you have a fallback) you can use transform:
.center {
right: 50%;
bottom: 50%;
transform: translate(50%,50%);
position: absolute;
}
Unlike the first approach above, you don't want to use left:50% with the negative translation because there's an overflow bug in IE9+. Utilize a positive right value and you won't see horizontal scrollbars.
Here is how to use two simple flexbox properties to center n divs on the two axes:
Set the height of your container: Here the body is set to be at least 100 viewport height.
align-items: center; will center the blocks vertically if flex direction is row else horizontally if flex direction is column
justify-content: space-around; will distribute the free space vertically if flex direction is row else horizontally if flex direction is column around the div elements
body {
min-height: 100vh;
display: flex;
align-items: center;
justify-content: space-around;
}
<div>foo</div>
<div>bar</div>
The best way to center a box both vertically and horizontally, is to use two containers :
The outher container :
should have display: table;
The inner container :
should have display: table-cell;
should have vertical-align: middle;
should have text-align: center;
The content box :
should have display: inline-block;
should adjust the horizontal text-alignment, unless you want text to be centered
Demo :
body {
margin : 0;
}
.outer-container {
display: table;
width: 80%;
height: 120px;
background: #ccc;
}
.inner-container {
display: table-cell;
vertical-align: middle;
text-align: center;
}
.centered-content {
display: inline-block;
text-align: left;
background: #fff;
padding : 20px;
border : 1px solid #000;
}
<div class="outer-container">
<div class="inner-container">
<div class="centered-content">
Center this!
</div>
</div>
</div>
See also this Fiddle!
Centering in the middle of the page:
To center your content in the middle of your page, add the following to your outer container :
position : absolute;
width: 100%;
height: 100%;
Here's a demo for that :
body {
margin : 0;
}
.outer-container {
position : absolute;
display: table;
width: 100%;
height: 100%;
background: #ccc;
}
.inner-container {
display: table-cell;
vertical-align: middle;
text-align: center;
}
.centered-content {
display: inline-block;
text-align: left;
background: #fff;
padding : 20px;
border : 1px solid #000;
}
<div class="outer-container">
<div class="inner-container">
<div class="centered-content">
Center this!
</div>
</div>
</div>
See also this Fiddle!
CSS Grid: place-items
Finally, we have place-items: center for CSS Grid to make it easier.
HTML
<div class="parent">
<div class="to-center"></div>
</div>
CSS
.parent {
display: grid;
place-items: center;
}
Output:
html,
body {
height: 100%;
}
.container {
display: grid;
place-items: center;
height: 100%;
}
.center {
background: #5F85DB;
color: #fff;
font-weight: bold;
font-family: Tahoma;
padding: 10px;
}
<div class="container">
<div class="center" contenteditable>I am always super centered within my parent</div>
</div>
Run this code snippet and see a vertically and horizontally aligned div.
html,
body,
.container {
height: 100%;
width: 100%;
}
.container {
display: flex;
align-items: center;
justify-content: center;
}
.mydiv {
width: 80px;
}
<div class="container">
<div class="mydiv">h & v aligned</div>
</div>
.align {
display: flex;
width: 400px;
height: 400px;
border: solid 1px black;
align-items: center;
justify-content: space-around;
}
.align div:first-child {
width: 20px;
height: 20px;
background-color: red;
position: absolute;
}
.align div {
width: 20px;
height: 20px;
background-color: blue;
}
<div class='align'>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
</div>
First child will be aligned vertically and horizontally at center
Source Link
Method 1) Display type flex
.child-element{
display: flex;
justify-content: center;
align-items: center;
}
Method 2) 2D Transform
.child-element {
top: 50%;
left: 50%;
transform: translate(-50% , -50%);
position: absolute;
}
See other methods here
to center the Div in a page check the fiddle link
#vh {
border-radius: 15px;
box-shadow: 0 0 8px rgba(0, 0, 0, 0.4);
padding: 25px;
width: 200px;
height: 200px;
background: white;
text-align: center;
margin: auto;
position: absolute;
top: 0;
left: 0;
bottom: 0;
right: 0;
}
<div id="vh">Div to be aligned vertically</div>
Update
Another option is to use flex box check the fiddle link
.vh {
background-color: #ddd;
height: 200px;
align-items: center;
display: flex;
}
.vh > div {
width: 100%;
text-align: center;
vertical-align: middle;
}
<div class="vh">
<div>Div to be aligned vertically</div>
</div>
Below is the Flex-box approach to get desired result
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>Flex-box approach</title>
<style>
.tabs{
display: -webkit-flex;
display: flex;
width: 500px;
height: 250px;
background-color: grey;
margin: 0 auto;
}
.f{
width: 200px;
height: 200px;
margin: 20px;
background-color: yellow;
margin: 0 auto;
display: inline; /*for vertically aligning */
top: 9%; /*for vertically aligning */
position: relative; /*for vertically aligning */
}
</style>
</head>
<body>
<div class="tabs">
<div class="f">first</div>
<div class="f">second</div>
</div>
</body>
</html>
Another approach is to use table:
<div style="border:2px solid #8AC007; height:200px; width:200px;">
<table style="width:100%; height:100%">
<tr style="height:100%">
<td style="height:100%; text-align:center">hello, multiple lines here, this is super long, and that is awesome, dude</td>
</tr>
</table>
</div>
Grid css approach
#wrapper {
position: absolute;
top: 0;
bottom: 0;
right: 0;
left: 0;
display: grid;
grid-template-columns: repeat(3, 1fr);
grid-template-rows: repeat(3, 1fr);
}
.main {
background-color: #444;
}
<div id="wrapper">
<div class="box"></div>
<div class="box"></div>
<div class="box"></div>
<div class="box"></div>
<div class="box main"></div>
</div>
Need to follow following New and easy solution:
.centered-class {
align-items: center;
display: flex;
justify-content: center;
width: 100vw;
height: 100vh;
}
<div class="centered-class">
I'm in center vertically and horizontally.
</div>
The simplest and cleanest solution for me is using the CSS3 property "transform":
.container {
position: relative;
}
.container a {
position: absolute;
top: 50%;
transform: translate(0,-50%);
}
<div class="container">
Hello world!
</div>
In order to vertically and horizontally center an element we can also use below mentioned properties.
This CSS property aligns-items vertically and accepts the following values:
flex-start: Items align to the top of the container.
flex-end: Items align to the bottom of the container.
center: Items align at the vertical center of the container.
baseline: Items display at the baseline of the container.
stretch: Items are stretched to fit the container.
This CSS property justify-content , which aligns items horizontally and accepts the following values:
flex-start: Items align to the left side of the container.
flex-end: Items align to the right side of the container.
center: Items align at the center of the container.
space-between: Items display with equal spacing between them.
space-around: Items display with equal spacing around them.
Just make top,bottom, left and right to 0.
<html>
<head>
<style>
<div>
{
position: absolute;
margin: auto;
background-color: lightblue;
width: 100px;
height :100px;
padding: 25px;
top :0;
right :0;
bottom:0;
left:0;
}
</style>
</head>
<body>
<div> I am in the middle</div>
</body>
</html>
You can achieve this using CSS (your element display:inline-grid + grid-auto-flow: row; ) Grid and Flex Box ( parent element display:flex;),
See below snippet
#leftFrame {
display: flex;
height: 100vh;
width: 100%;
}
#tabs {
display: inline-grid;
grid-auto-flow: row;
grid-gap: 24px;
justify-items: center;
margin: auto;
}
html,body {
margin:0;
padding:0;
}
<div>
<div id=leftFrame>
<div id=tabs>
<div>first</div>
<div>second</div>
</div>
</div>
</div>
This should works
.center-div {
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
text-align: center;
min-height: 100vh;
}
<div class="center-div">Center Div</div>
If you prefer it without flexbox, grid, table or vertical-align: middle;
You can do:
HTML
<div class="box">
<h2 class="box__label">square</h2>
</div>
CSS
.box {
box-sizing: border-box;
width: 100px;
height: 100px;
text-align: center;
border: 1px solid black;
}
.box__label {
box-sizing: border-box;
display: inline-block;
transform: translateY(50%);
text-align: center;
border: 1px solid black;
}
If it's only about text aligning it's simple. Just use this:
vertical-align: middle; /* vertical centering*/
text-align: center; /* horizontal centering*/
Parent styling is not needed.
In some cases when the parent has some style properties it may affect the child, where this will not work properly.
Approach 6
/*Change units to "%", "px" or whatever*/
#wrapper{
width: 50%;
height: 70vh;
background: rgba(0,0,0,.5);
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
margin: auto;
}
#left{
width: 50%;
height: 50vh;
position: absolute;
top: 0;
bottom: 0;
left: 0;
margin: auto;
background: red;
}
#right{
width: 50%;
height: 50vh;
position: absolute;
top: 0;
bottom: 0;
right: 0;
margin: auto;
background: green;
}
.txt{
text-align: center;
line-height: 50vh;
}
<div id="wrapper">
<div id="left" class="txt">Left</div>
<div id="right" class="txt">Right</div>
</div>
.container{
width: 50%; //Your container width here
height: 50%; //Your container height here
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
margin: auto;
}
The easiest way of centering a div both vertically and horizontally is as follows:
<div style="display: table; width: 200px; height: 200px; border: 1px solid black;">
<div style="display: table-cell; vertical-align: middle; text-align: center;">
Text Here
</div>
</div>
One More Example:
.parent {
display: table;
width: 100%;
height: 100%;
}
.child {
display: table-cell;
vertical-align: middle;
text-align: center;
}
<div class="parent">
<div class="child">
<h4><u>SERVICE IN BANGLADESH FLEET RESERVE <br> AND <br> RE-ENGAGEMENT ORDER FOR DEFENCE SERVICE</u></h4>
</div>
</div>
I see this the shortest and easiest way. However it depends on the element width and height. So feel free to adjust more the percentages on translate(50%, 50%);.
.divContainer {
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
transform: translate(50%, 50%);
}
<div class="divContainer">I am centered</div>
The simplest flexbox approach:
The easiest way how to center a single element vertically and horizontally is to make it a flex item and set its margin to auto:
If you apply auto margins to a flex item, that item will automatically
extend its specified margin to occupy the extra space in the flex
container...
.flex-container {
height: 150px;
display: flex;
}
.flex-item {
margin: auto;
}
<div class="flex-container">
<div class="flex-item">
This should be centered!
</div>
</div>
This extension of margins in each direction will push the element exactly to the middle of its container.
In the case where I was trying to vertically align text content inside button::before and button::after, I was able to get it working using vertical-align: text-top.
button::after {
vertical-align: text-top;
}
I use this CSS code:
display: grid;
justify-content: center;
align-items: center;
The source is CSS-Tricks
This is a related problem that people might come to this page when searching: When I want to centre a div for a "waiting.." 100px square animated gif, I use:
.centreDiv {
position: absolute;
top: -moz-calc(50vh - 50px);
top: -webkit-calc(50vh - 50px);
top: calc(50vh - 50px);
left: -moz-calc(50vw - 50px);
left: -webkit-calc(50vw - 50px);
left: calc(50vw - 50px);
z-index: 1000; /* whatever is required */
}

How to position absolute element vertically in the center?

As you can see in the snippet below, I have a .square-container which is positioned absolutely and it contains a square. I'm trying to vertically position the .square-container in the center of the parent div.
.container {
position: relative;
background-color: blue;
}
.square-container {
position: absolute;
top: 0;
right: 0;
height: 30px;
width: 30px;
}
.square {
width: 100%;
height: 100%;
background-color: red;
}
.hello {
padding: 15px;
}
<div class='container'>
<p class='hello'>Hello</p>
<div class="square-container">
<div class='square'></div>
</div>
</div>
For positioning absolute elements in the middle use top: 50%
And then use transform: translateY(-50%); and its centered
.container {
position: relative;
background-color: blue;
}
.square-container {
position: absolute;
right: 10px;
top: 50%;
height: 30px;
width: 30px;
transform: translateY(-50%);
}
.square {
width: 100%;
height: 100%;
background-color: red;
}
.hello {
padding: 15px;
}
<div class='container'>
<p class='hello'>Hello</p>
<div class="square-container">
<div class='square'></div>
</div>
</div>
.container{
display:flex;
align-items:center;
}
You wouldn't need absolute positioning here. If you set the container as a flex wrapper, you won't also need to position it relatively and can get rid of the square-container div as well that currently wraps the div.square element.
To push the square to the right, we could
A) use auto-margins inside the flex layout. So all that our div.square needs, is margin-left: auto, which tells the browser to push it as far as possible from its left siblings.
B) Use justify-content: space-between on our container. This tells the flex container to space out the elements to the sides.
The approaches differ very slightly and don't really matter in this example until we start adding more elements.
An updated example:
A
.container {
display: flex;
align-items: center;
background-color: skyblue;
padding: 15px;
}
.square {
height: 30px;
width: 30px;
margin-left: auto;
background-color: tomato;
}
<div class='container'>
<p class='hello'>Hello</p>
<div class='square'></div>
</div>
B
.container {
display: flex;
align-items: center;
justify-content: space-between;
background-color: skyblue;
padding: 15px;
}
.square {
height: 30px;
width: 30px;
background-color: tomato;
}
<div class='container'>
<p class='hello'>Hello</p>
<div class='square'></div>
</div>

Footer overlapping the content when browser window is shrunk

I need to avoid the overlapping of the div's when the browser window is shrinked vertically in the following piece of code:
`
<html>
<body>
<style>
#box {
display: flex;
flex-direction: column;
align-items: center;
}
#top {
background-color: red;
height: 560px;
width: 400px;
}
#bottom {
background-color: green;
height: 100px;
width: 400px;
position: absolute;
bottom: 0
}
</style>
<div id="box">
<div id="top">
</div>
<div id="bottom">
</div>
</div>
<body>
</html>
`
Why are the div's getting overlapped. is there a way that this overlapping can be avoided and having the same initial structure? The bottom div acts as a footer in the real scenario. Thanks in advance!
Use min-height on the box, remove absolute positioning from the bottom and both div's heights will be kept.
When the margin-top: auto is set on a flex column item, it will push it to the bottom of is parent, which you can see on bigger screens.
body {
margin: 0;
display: flex; /* IE bug fix */
}
#box {
flex-grow: 1; /* fill body's width */
display: flex;
flex-direction: column;
align-items: center;
min-height: 100vh;
}
#top {
background-color: red;
height: 560px;
width: 400px;
border: 1px solid black;
}
#bottom {
margin-top: auto; /* push it to the bottom on big screen */
background-color: green;
height: 100px;
width: 400px;
border: 1px solid black;
}
<div id="box">
<div id="top">
</div>
<div id="bottom">
</div>
</div>
If they at some point they need to shrink, with this sample the red div does, where the height is fixed to full viewport.
It works like that, that the green is given flex-shrink: 0, which prevent it from shrink and keep its set height.
html, body {
margin: 0;
}
#box {
display: flex;
flex-direction: column;
align-items: center;
height: 100vh;
}
#top {
background-color: red;
height: 560px;
width: 400px;
border: 1px solid black;
}
#bottom {
margin-top: auto;
flex-shrink: 0;
background-color: green;
height: 100px;
width: 400px;
border: 1px solid black;
}
<div id="box">
<div id="top">
</div>
<div id="bottom">
</div>
</div>
You need to set position: relative; to parent, in this case to body element, it will solve the issue. When the parent's position is relative, and the child's position is absolute, the child will respect parent and will be positioned relatively to the parent:
body {
position: relative;
}
#box {
display: flex;
flex-direction: column;
align-items: center;
}
#top {
background-color: red;
height: 560px;
width: 400px;
}
#bottom {
background-color: green;
height: 100px;
width: 400px;
position: absolute;
bottom: 0
}
<div id="box">
<div id="top">
</div>
<div id="bottom">
</div>
</div>

vertical / horizontal alignment without top left transform on element with uknown width / height

How can i vertically / horizontally align this item with auto generated width / height without using the classic top:50% left:50% transform: translate(-50%,-50%)
css setup without alignments
#container {
width: 200px;
height: 100px;
background-color: lightblue;
}
#myImage {
width: auto;
height: auto;
max-height: 100px;
max-width: 200px;
}
I'm not entirely sure what you're trying to achieve but this is the image with no fixed height or width set in the CSS. I assume from your OP that you want is centered as such - so if the image dimensions changed it will stay centralized along both axis.
Note the only limitations you face are those older browsers that don't support flex. If that's a problem you can use display: table; and display: table-cell; to good effect.
http://jsfiddle.net/dLLan/29/
css:
#container {
width: 250px;
max-height: 250px;
height: 250px;
position: relative;
display: flex;
justify-content: center;
align-items: center;
background-color: lightblue;
}
#myImage {
//removed
}
You can use something like that:
#helper {
display: inline-block;
height: 100%;
vertical-align: middle;
}
#container {
width: 200px;
height: 100px;
background-color: lightblue;
text-align:center;
}
#myImage {
width: auto;
height: auto;
max-height: 100px;
max-width: 200px;
vertical-align: middle;
}
<div id="container">
<div id="helper"></div>
<img id="myImage" src="http://s3.amazonaws.com/hirethings/photo/7250/images/thumbnail.jpg?1274508483" />
</div>
Flexbox should be fine here depending on your Browser support requirements.
There is no need to position the image...the flex will do that.
.container {
width: 200px;
height: 100px;
background-color: lightblue;
display: flex;
justify-content: center;
align-items: center;
margin-bottom: 1em;
}
.large {
width: 300px;
height: 200px;
}
.myImage {
width: auto;
height: auto;
}
<div class='container'>
<img class='myImage' src='http://s3.amazonaws.com/hirethings/photo/7250/images/thumbnail.jpg?1274508483' />
</div>
<div class='container large'>
<img class='myImage' src='http://lorempixel.com/image_output/food-q-c-250-160-5.jpg' />
</div>