I'm creating a responsive design so my website is viewed well on both Desktop and Mobile devices. On my website I have a pretty large background image on one of my divs.
Now what I have been wondering is: Does the background image on my div load if it is replaced by a color in a media query?
Example:
div {
background: url(img/large-image.jpg);
}
#media screen and (min-width: 240px) and (max-width:830px) {
div {
background: #000;
}
}
No it wouldn't as you're completely overriding the background property*.
For reference, however, if you wish to keep your image and add in a colour, rather than using the background property, use the individual background-image and background-color properties:
div {
background-image: url(img/large-image.jpg);
}
#media screen and (min-width: 240px) and (max-width:830px) {
div {
background-color: #000;
}
}
* Note that this is browser-specific; to save time the majority of browsers will only load resources when they're required. See also: Are unused CSS images downloaded?
Your images are still loaded by browser, as long as they are in your CSS. You can check it by using Chrome Debugger Tool > Network.
There is a interesting article about image load & performance in responsive design:
http://mobile.smashingmagazine.com/2013/09/16/responsive-images-performance-problem-case-study/
Related
I'm working on a homepage, where, depending on the screen size, image A or B is loaded. Image A is using the
usemap
tag to display captions upon mouseover.
For now, both images are loaded into cache and I'd like to only load one, which I've achieved through the use of css's
#media screen and (min-width: 601px) {
.mobile {
display: none !important;
}
.desktop {
content: url("../assets/a.jpg");
}
}
. Problem being, the usemap tag won't work anymore. How can this be resolved?
I'm pretty new to advanced CSS. I have a custom heading section which i want to make centered on mobile only. I have added a class name and the following code but nothings happened.
.mobile-text {
text-align: right;
}
#media (max-device-width: 600px) {
.mobile-text {
text-align: center;
}
}
This is the homepage of this site and the paragraph is the following:
REAL ESTATE THAT CHALLENGES NORMS & ELEVATES EXPECTATIONS. THIS IS COLOURFUL THINKING IN A BLACK AND WHITE WORLD.
Your class on the website is .mobile-text, and it should be mobile-text - The . is only used in selectors to say that the following text is a class name
Also, your inline styles on the element ( style=font-size: 35px... etc ) is overwriting your changes - you can use !important to handle this lazily
.mobile-text {
text-align: right !important;
}
#media (max-device-width: 600px) {
.mobile-text {
text-align: center !important;
}
}
max-device-width will target the width of the entire device area (i.e the device screen). Instead use max-width, which will target the width of the entire browser area.
#media (max-width: 600px) {
.mobile-text {
text-align: center;
}
}
Note: device-width queries are deprecated.
When I check the html of your page I can see the class="" of this <h4>:
class="vc_custom_heading .mobile-text wpb_animate_when_almost_visible wpb_right-to-left right-to-left vc_custom_1580217248411 wpb_start_animation animated"
In your css you want to manipulate it using the .mobile-text class. Problem here is that you define this class in your html using .mobile-text. That's actually wrong, you need to define it with only mobile-text like this:
class="vc_custom_heading mobile-text wpb_animate_when_almost_visible wpb_right-to-left right-to-left vc_custom_1580217248411 wpb_start_animation animated"
The . is actually a css selector for a class like # is a selector for an id.
Your media query is not working on desktop if you are check in desktop view.
And also your class declaration is wrong please remove . from mobile-text. :)
max-width is the width of the target display area, e.g. the browser
max-device-width is the width of the device's entire rendering area, i.e. the actual device screen
Please use #media all and (max-width: 600px){}
For more details please visit here
Hope it will help you. :)
I'm a bit lost with CSS handling in order to manage stylesheet about screen size. I'm developing a Django website project and I'm confronting to a very delicate situation.
My project is developped on a very good screen (Retina screen) with a very high resolution. But, when I'm watching my project on a very bad screen resolution, some elements are not situated where it should be.
I put for example part from a .css file corresponding to HTML base template :
/* ############################################# */
/* CSS File about Home application properties */
/* ############################################# */
#import url("http://bootswatch.com/flatly/bootstrap.min.css");
/* If screen less than 1440px */
#media screen and (max-width: 1440px) {
.navbar-right {
/*padding-left: 250px;*/
position:absolute;
right:2%;
}
}
/* If screen bigger than 1440px */
#media screen and (min-width: 1450px) {
.navbar-right {
/*padding-left: 400px;*/
position:absolute;
right:2%;
}
}
/* Define background color from upper navbar */
.navbar-inverse {
background-color: #007A5E !important;
}
/* DatasystemsEC tab */
.navbar-inverse .container-fluid .navbar-header .navbar-brand {
color : white;
}
/* Tab properties from navbar */
.navbar .nav > li > a {
color: white;
}
footer {
text-align: center;
margin-top: 35%;
}
How I can handle CSS stylesheet in order to adapt the file to screens resolution ?
Can you tell me what is right or wrong in following ideas :
I have to write only % and not px in order to take account screen resolution
I have to write CSS file firstly for screen resolution between a and b, then between b and c, ...
For example, the main content in my Django website corresponding to the class = "col-sm-8". I added margin-top = -68% in order to situate the content exactly where I want. But with my friend's screen, the same block is not where it should be.
I'm really new with CSS (and Django too) because I'm learning at the same time I'm coding in order to realize my project.
Thank you if you could help me on this subject.
Current consensus is to approach web development "mobile first". That means start from the smallest screen size and work up to the largest. Bootstrap does exactly that.
In order to decide what are the best suited media queries for your project see this tutorial and this documentation on MDN. Since you are using Bootstrap, I would suggest following the same breakpoins to avoid inconsistencies.
Also, consider using vw and vh instead of percents, when appropriate (I believe this might be part of that margin-top problem). Percents are relative to a container's dimensions. vw and vh are relative to the width and height of the viewport (see in MDN).
I am currently working on a website using Joomla and I am using SP Page Builder extension to construct my content pages. I have a background image on one of these content pages and it just messes up the mobile display of the webpage so i want hide the background image on mobile devices. I have used this css code which has worked for me before (on pages without SP Page Builder) but it seems not to be working, here is the code:
#media all and (max-width: 768px) {
section.sppb-section.bg {
background-color: #ffffff;
background-image: none;
}
}
here is the auto generated HTML code of the element with a background image:
This is a screenshot of page the layout of a row with two columns, somehow this row and columns are constructed using <div></div> tags
Is there a solution to this or a work around. Thank You.
In your html you have inline style which force the background to be there so you will need to use !important to force background-image to be none
#media all and (max-width: 768px) {
section.sppb-section.bg {
background-color: #ffffff !important;
background-image: none !important;
}
}
Just have the background image display on screens > 768px, not the other way around.
.bg {
background:#fff;
}
#media screen and (min-width:768px){
.bg {
background-image:url(img.jpg);
}
}
Inline CSS is always take preference over external css that's why your css code is not working. Try to keep that inline css style code in external css file.
It looks like the bg image is being added in the style attribute which will override your css class. You'll need to decorate your css with important.
#media all and (max-width: 768px) {
section.bg {
background-color: #ffffff !important;
background-image: none !important;
}
}
I am new to learning responsive design. What I have noticed on my journey is that when I put media queries at the bottom of the stylesheet, everything works flawlessly in regards to breakpoints. If I put the media queries at the top of the stylesheet, nothing works, and only recently I found out that I need to add !important and max-DEVICE-width ( as opposed to max-width) to the css that is being changed.
Why is this? Why do the media queries work on both desktop and mobile when put at the bottom of the stylesheet.
Why is it that when I put media queries on the top of the stylesheet I need to add !important and also max-DEVICE-width in order for the breakpoints to work on desktop and mobile?
Because css is read from top to bottom. The rule that is set last, is the one that will be executed.
Translating, it is like this:
#media (max-width: 600px) { //If my screen fits this size
.text {
color: red; //Paint it red
}
}
.text {
color: yellow; //Now, forget about everything and paint it yellow!
}
When you add !important is like saying:
#media (max-width: 600px) { //If my screen fits this size
.text {
color: red !important; //Paint it red, and don't change it ever!!!
}
}
.text {
color: yellow; //Ok, I'm not going to paint it yellow....
}
CSS is read from top to bottom.
Everything that is below some other css will overwrite what's on top of it.
It is possible however to use !important at the end of a CSS parameter to make it overwrite everything else
body{
background-color: black !important;
}
body{
background-color: pink;
}
The background-color will be black.
If you remove the !important, it will be pink.
Media queries cascade with the rest of the stylesheet. You can intersperse media queries within your stylesheet, and so you can also cascade styles as needed.
For example:
.my-class {
color: red;
}
.my-class--modifier {
color: blue;
}
#media screen and (min-width: 760px) {
.my-class--modifier {
color: green;
}
}
.some-other-class {
width: 200px;
}
#media screen and (min-width: 760px) {
.some-other-class {
width: 700px;
background-color: gray;
}
.some-other-class .my-class {
border: 2px solid red;
border-radius: 4pt;
}
}
This works precisely due to CSS's cascading nature. You can organize media queries as required based on sections, individual selectors and more.
Basically you are using media queries when you want to apply CSS styles depending on a device's general type (such as print vs. screen), specific characteristics (such as the width of the browser viewport, or environment (such as ambient light conditions).
When you started designing, you generally started doing it for one device of known specifications. So you design it according to you current device and then apply it for other screen sizes.
Hence the order goes like this: Make complete design --> Add the media query to fit for desired screen sizes at the bottom.
It is preferrable to write the query at the bottom became of precedence. That will save you from stress of using important! everytime.