media queries with bootstrap not working - html

I wanted to have large pictures be hidden for mobile devices. Looking at this site I put the following styles in my css:
//medium+ screen sizes
#media (min-width:992px) {
.desktop {
display:block !important;
}
}
//small screen sizes
#media (max-width:991px) {
.mobile {
display:block !important;
}
.desktop {
display:none !important;
}
}
Then I apply the class in my html like this:
<img class="desktop" src="img/test/test.jpg"
alt="jhkjhjk" height="600" width="900">
But when I shrink my browser window the image remains there. Have I missed something?

Since you are using Boostrap, you can do it even easier.
Append a class of
visible-md
to your image.
md is for >992 px.
Check out the easy classes you can use
http://getbootstrap.com/css/#responsive-utilities
EDIT: probably wanna do visible-md visible-lg if you're gonna do visibles. The chart explains all the combinations.

Related

How can I add a margin-left for an image only if it is shown on a separate line (small screens) using Bootstrap 4.0?

I have the following code to show 2 images beside each others:-
<img style="padding-left:25%;margin-top:15px;margin-right:20%" src="~/img/1.png" /><img style="margin-top:15px" src="~/img/2.png" />
as follow:-
but on smaller sized screens, the 2 image will be shown under each other (which is fine), but they will not be aligned vertically as follow:-
so how i can fix this? in other words how can I add a margin-left for the second image only if it is shown on a separate line?
You will need to use media queries:
img {
margin-top:15px;
}
#media screen and (min-width: 768px) {
img {
padding-left:25%;
margin-right:20%;
}
}
That 768px is arbitrary, you can change it to the value you need. You can use min-resolution instead of min-width instead.
You can also try using display property with media query.
<div class="display">
<img style="margin-right: 20px;" src="~/img/1.png" />
<img src="~/img/2.png" />
</div>
.display {
display: flex;
}
#media(min-width: 320px) and (max-width: 767px) {
.display {
display: block;
}
}
You can do it with javascript. Listen every time window is resizing and calculate is the sum of width of all images are higher than the window width, and add margin/padding according to situation
window.addEventListener('resize', function(event){ //listen to window resize
let img1w = document.getElementById('image1').offsetWidth;
let img2w = document.getElementById('image2').offsetWidth;
if (img1w + img2w > window.innerWidth) {
document.getElementById('img1w').style.marginLeft = '200px' //just a placeholder. do what you want here
}
});
You can also use bootstrap media queries but there's only limited number of break points. So you have to create your own media query

Firefox Only CSS in a Media Query

I'm trying to write some css that will only work in firefox, that is within a media query so it only works after 767px. Below is what I've currently written but it doesn't work.
#media only (min-width: 767px) {
#-moz-document url-prefix() {
.SearchBlock input {
width:88% !important;
}
}
}
It works just fine without the "#media only" section, but I only want it to work after 767px. Is this possible?
Edit: Changed resolution to width.
Don't use min-resolution. Use
min-width: if you need to apply CSS to the devices which are more than 767px, and use
max-width: If you need to apply CSS to the devices having size less than 767px - for mobiles
Example:
#media screen and (min-width: 767px) {
#-moz-document url-prefix() {
.SearchBlock input {
width:88% !important;
}
}
}
Hope this helps!
You are not getting the result because you are using min-resolution correctly.
You can do one of the 2 :
Either change min-resolution to min-width
Enter resolution value in min-resolution for example min-resolution(192dpi)
Px is not the unit of resolution.
Change min-resolution to min-width.
Resolution is for the pixel density of the device. width refers to the actual width which is what you want.
The url-prefix portion needs to have the url of the document the style rules refer to, such as
url-prefix("https://example.com/")
The #document CSS at-rule restricts the style rules contained within
it based on the URL of the document.
https://developer.mozilla.org/en-US/docs/Web/CSS/#document
Try this. Should work! :)
.SearchBlock input {
display: block;
width: 30%;
}
#-moz-document url-prefix() {
#media screen and (min-width: 767px) {
.SearchBlock input {
width:88% !important;
}
}
}
<div class="SearchBlock">
<input type="text" placeholder="text"/>
</div>

Hide image on mobile

I have this html tag to put an arbitrary image on a page.
<img src="https://example.com/wp-content/uploads/....186.png" width="133" height="13" style="float:right; margin-right: 100px; margin-top: 40px;" />
However, I dont want this image on mobile. Can this be done?
It is better to be mobile first.
select class for your image. for example hide-mobile. then write these codes:
.hide-mobile
{
display: none;
}
#media only screen and (min-width: 500px) {
.hide-mobile
{
display: block;
}
}
You should take a look at media queries:
https://www.w3schools.com/css/css_rwd_mediaqueries.asp
To hide the image, you would need a media query with display:none, which is only included on a low resolution.
#media only screen and (max-width: 500px) {
img {
display: none;
}
}
EDIT: It is not a good idea to define your style inline. You should rather use a seperate css file or at least a <style> block in your header. This helps with controlling different scenarios and keep your styling consistent over multiple objects and pages.

Removing 'specific' images with media queries

I am looking for how to remove specific images with media queries. I am using HTML/CSS for a webpage.
Here is the code I currently have, which does not work (it was experimental):
#media (min-width:0px) and (max-width:1200px) {
LEVEL 1.png, level 6.png, http://placehold.it/160x600, http://placehold.it/100x100 {
display:none;
}
}
Any suggestions would be great, thanks.
Just give the images a class and then in the media query:
.that-class-name {
display: none;
}
Also, you should probably remove min-width: 0. I'm wondering if something less than 1200px would be better for for max-width as well. That's very wide.
Here you have to add a class inside the your media query
#media (min-width:0px) and (max-width:1200px)
.img { display: none; margin: 0 auto;} // your image class or can be img tag
}
and just now i answered the same question Here

How to write different HTML for different screen sizes

I understood how I change CSS via media queries (such as media="screen and (max-width:640px)")
but let's say I want to write (just for example)
<div>
[if screen resolution is lower then 960 px]
<div>
some new text only for lower resolution
</div>
[end of condition]
</div>
What is the condition I need to write to get it right?
As far as i have experienced, you cannot do media queries inside HTML pages. You need to do it from within your CSS.
But if you want to show some special text only when it is below a certain resolution, why not only make it visible when the resolution is lower than 960px?
Creating responsive designs is very different from a regular design, because you have to think a lot more (which is haaard)
you can check it via using javascript screen object :
screen.width
or you can do this with css
<link rel="stylesheet" media="screen and (min-device-width: 800px)" href="800.css" />
http://css-tricks.com/6206-resolution-specific-stylesheets/
http://www.javascriptkit.com/howto/newtech3.shtml
I am actually going through the same situation and found that if you want to do this you could really add all the text in the HTML page, and then hide it on screen widths that you don't want it to show. For example:
<div>
[text that will be shown for screens less or equal to 960px in width]
<div class="smallScreen">
some new text only for lower resolution
</div>
[end of condition for small screens]
[text that will be shown for other screens that are greater in width]
<div class="largeScreen">
some new text only for higher resolution
</div>
</div>
And then you could add CSS:
/* On smaller resolutions, hide the text for Large screens */
#media only screen and (max-width: 960px) {
.largeScreen {display: none;}
}
/* On larger resolutions, hide the text for Small screens */
#media only screen and (min-width: 960px) {
.smallScreen {display: none;}
}
I hope this works out fine :)
You need to assign an id (or a class or any other way of finding your element from CSS) to the <div> and then you can set a media query definition like this:
<div id="mydiv">...</div>
<style type="text/css">
#media screen and (min-width: 961px) {
div#mydiv { display: none }
}
</style>
Or for better readability: Make it hidden on default and visible if max-width: 960px.
I could be wrong, but I think css selection by resolution would need a little help from javascript.
Here is a quick example of what that js could look like, embedded in jquery:
$(document).ready(function() {
if ((screen.width>=1024) && (screen.height>=768)) {
alert('Screen size: 1024x768 or larger');
$("link[rel=stylesheet]:not(:first)").attr({href : "detect1024.css"});
}
else {
alert('Screen size: less than 1024x768, 800x600 maybe?');
$("link[rel=stylesheet]:not(:first)").attr({href : "detect800.css"});
}
});
Hope that helps.
You can add jQuery function to change style dynamically as per scree resolution.
if(screen.width==1600)
{
jQuery('#hb-gotop').removeAttr("margin-left", "-0.9");
jQuery('#hb-gotop').attr('style', 'margin-left: -0.7%');
}
else if(screen.width==1280)
{
jQuery('#hb-gotop').removeAttr("margin-left", "-0.9");
jQuery('#hb-gotop').attr('style', 'margin-left: -0.9%');
}
else if(screen.width==1024)
{
jQuery('#hb-gotop').removeAttr("margin-left","-0.9");
jQuery('#hb-gotop').attr('style', 'margin-left: -1.1%');
}
else if(screen.width==800)
{
jQuery('#hb-gotop').removeAttr("margin-left","-0.9");
jQuery('#hb-gotop').attr('style', 'margin-left: -1.3%');
}
Answere was helpful from:
if screen resolution is less than x append css
You can do this entirely with CSS 3 using the #media command.
**#media (max-width:960px) { css... } //nothing with screen size bigger than 960px
#media (min-width:960px) { css... } //nothing with screen size smaller than 960px**
Jason Whitted makes a good point, this is CSS 3 only, so it won't work with older browsers (it should work with all modern browsers though).
You can as well do screen or device edit
#media screen { .nomobile { display: block; } } //desktops/laptops
#media handheld { .nomobile { display: none; } } //mobile devices
Or you could assume mobile devices will have a smaller width, and go on that.