I'm doing a project with Flutter web. When Flutter web is opened the first time it takes a few seconds to load so I want to show a spinner loader. I've tried adding the following to the index.html:
<div class="loading">
<div class="loader" />
</div>
with these styles:
.loading {
display: flex;
justify-content: center;
align-items: center;
margin: 0;
position: absolute;
top: 50%;
left: 50%;
-ms-transform: translate(-50%, -50%);
transform: translate(-50%, -50%);
background-image: url("img/images.jpeg");
background-size: contain;
resize: both;
padding: 25px;
}
.loader {
border: 16px solid #f3f3f3;
border-radius: 50%;
border: 15px solid;
border-top: 16px solid #8a2245;
border-right: 16px solid white;
border-bottom: 16px solid #8a2245;
border-left: 16px solid white;
width: 120px;
height: 120px;
-webkit-animation: spin 2s linear infinite;
animation: spin 2s linear infinite;
}
#-webkit-keyframes spin {
0% {
-webkit-transform: rotate(0deg);
}
100% {
-webkit-transform: rotate(360deg);
}
}
#keyframes spin {
0% {
transform: rotate(0deg);
}
100% {
transform: rotate(360deg);
}
}
But background-image has bad size and I want it to be small and located in de middle of spinner. How can I do that?
You can set size of background image using background-size property in px (pixel) or % (percentage). And align the image to center using background-position: center;
Related
I'm trying to do a loader with HTML and CSS I have the loader done but there's an issue when I have information behind the center of the loader the information doesn't show and the reason is because I have background: white; that I need to avoid showing the gradient because if I remove the white color and put transparent the gradient appears.
So I need to fix the problem when I have something behind the loader
.loader {
display: flex;
justify-content: center;
position: fixed;
top: 50%;
left: 50%;
z-index: 10;
}
.loader .circle {
background-image:linear-gradient(90deg, #a03297, #e90b5a);
width: 80px;
height: 80px;
border-style: solid;
border-color: transparent;
border-radius: 50%;
border-width: 1px;
animation: rot 2s linear infinite;
padding: 10px;
box-sizing: content-box;
}
.circle > div {
background:white;
height: 100%;
width: 100%;
border-style: solid;
border-color:transparent;
border-radius: 50%;
border-width: 1px;
}
#keyframes rot {
0% { transform: rotate(0deg) }
100% { transform: rotate(360deg); }
}
<div class="loader">
<div class="circle">
<div></div>
</div>
</div>
<p style="text-align: center; margin-top: 140px;">aaaaaaasssssssssssssssssçççççççççççççççççççççççççççççççççççççççççssssssss</p>
Use mask to make the inner part transparent:
.loader {
background:linear-gradient(yellow, #e90b5a);
/* Show only 10px from the border */
-webkit-mask:radial-gradient(farthest-side,#0000 calc(100% - 10px),#fff 0);
mask:radial-gradient(farthest-side,#0000 calc(100% - 10px),#fff 0);
border-radius: 50%;
position: fixed;
inset : calc(50% - 50px);
animation: rot 2s linear infinite;
}
#keyframes rot {
100% { transform: rotate(360deg); }
}
body {
background:linear-gradient(to right,grey,white)
}
<div class="loader"></div>
I want to add an loader in my angular 4 PWA. https://www.w3schools.com/howto/howto_css_loader.asp this loader is visible till all the contents of page get loaded.
<div *ngIf="isLoaded" class="loader"></div>
<div class="home-container" [hidden]="isLoaded"></div>
Initially isLoaded is true after loading all contents it will become false.
loader poistion => top => 0, right = 50%, left = 50%, bottom= 100%
.scss file
.loader {
border: 16px solid #f3f3f3; /* Light grey */
border-top: 16px solid #59d4bf; /* green */
border-radius: 50%;
margin: auto;
display: flex;
justify-content: center;
align-items: center;
width: 50px;
height: 50px;
-webkit-animation: spin 2s linear infinite;
animation: spin 2s linear infinite;
}
#keyframes spin {
0% {
transform: rotate(0deg);
}
100% {
transform: rotate(360deg);
}
}
#-webkit-keyframes spin {
0% {
-webkit-transform: rotate(0deg);
}
100% {
-webkit-transform: rotate(360deg);
}
}
here -stackblitz live code sample
Your should put your css,
margin-right: 50%; or margin-right: auto;
margin-top: 50%;
margin-left: 50%; or margin-right: auto;
your loader
.loader {
border: 16px solid #f3f3f3;
border-radius: 50%;
border-top: 16px solid #3498db;
width: 120px;
height: 120px;
-webkit-animation: spin 2s linear infinite; /* Safari */
animation: spin 2s linear infinite;
margin-left: 50%;
margin-right: 50%;
margin-top: 50%;
}
is it working , Live working code sample
I first tried implementing it through two triangles. And got a satisfactory output
#wrapper {
margin-left: 40vw;
margin-top: 20vh;
}
#fidgetu {
width: 0;
height: 0;
position: absolute;
margin-top: 3vh;
border-left: 50px solid transparent;
border-right: 50px solid transparent;
border-bottom: 100px solid red;
animation: rotate 2s linear infinite;
}
#fidgetd {
width: 0;
height: 0;
position: absolute;
margin-top: 3vh;
border-left: 50px solid transparent;
border-right: 50px solid transparent;
border-top: 100px solid red;
animation: rotate 2s linear infinite;
}
#keyframes rotate {
from {
transform: rotate(0deg);
}
to {
transform: rotate(360deg);
}
}
<div id="wrapper">
<div id="fidgetu">
</div>
<div id="fidgetd">
</div>
</div>
I guess drawing a fidget spinner would require 4 div circles and 3 div rectangles to connect the central circle to the other three and a wrapper div (applying animate property to this div). But the positioning is messing up.
Now how do I position them appropriately such that the entire block rotates around its center?
Set an element as the base spinner, and then 3 childs of this one as the outer circles.
if the outer ones are positioned over the first one, just rotating the base elements will handle the rotation of the others.
A litlle tricky are the curves connecting the inner and the outer. I have set a solution, but there is some missalignment. It still needs a last adjustment on the pixel values (but it's hard to get it exactly)
.spinner, .outer {
width: 100px;
height: 100px;
border-radius: 50%;
position: absolute;
transform-style: preserve-3d;
}
.spinner {
background-color: teal;
border: solid 20px tomato;
margin: 100px;
animation: rotate 4s infinite linear;
}
.outer {
background-color: lightblue;
border: solid 20px blue;
left: -20px;
top: -20px;
}
.outer:before {
content: "";
position: absolute;
width: 150px;
height: 150px;
border-radius: 50%;
transform: translate(-91px, 104px);
box-shadow: 0px -55px 0px -33px blue;
}
.outer:after {
content: "";
position: absolute;
width: 150px;
height: 150px;
border-radius: 50%;
transform: translate(-83px, -156px);
box-shadow: 0px 55px 0px -33px blue;
}
.outer:nth-child(1) {
transform: translate3D(120px, 0px, -10px);
}
.outer:nth-child(2) {
transform: rotate(120deg) translate3D(120px, 0px, -10px);
}
.outer:nth-child(3) {
transform: rotate(240deg) translate3D(120px, 0px, -10px);
}
#keyframes rotate {
from {transform: rotate(0deg);}
to {transform: rotate(360deg);}
}
<div class="spinner">
<div class="outer"></div>
<div class="outer"></div>
<div class="outer"></div>
</div>
I found loader CSS trick, and I want to put text or image into loader without rotation.
.loader {
border: 5px solid #f3f3f3;
border-radius: 50%;
border-top: 5px solid #fff;
width: 50px;
height: 50px;
animation: spin 1s linear infinite;
text-align: center;
line-height: 50px;
margin: 10px auto;
font-size: 12px;
}
.loader > span {
animation: no-spin .5s linear infinite;
}
#keyframes spin {
0% {
transform: rotate(0deg);
}
100% {
transform: rotate(360deg);
}
}
#keyframes no-spin {
0% {
transform: rotate(360deg);
}
100% {
transform: rotate(0deg);
}
}
<div class="loader">
<span>LOGO</span>
</div>
I tried #keyframes no-spin for reverse rotation, but didn't work.
You'll want to add display:block on the <span>. A transform on display:inline will not work (as specified in the spec). In practice this boils down to using display:block or display:inline-block.
I've also modified the animation time of .no-spin to 1s, to match your spin animation speed.
This will give the illusion of not spinning, in actuality it's spinning with the same speed in the opposite direction.
.loader {
border: 5px solid #f3f3f3;
border-radius: 50%;
border-top: 5px solid #fff;
width: 50px;
height: 50px;
animation: spin 1s linear infinite;
text-align: center;
line-height: 50px;
margin: 10px auto;
font-size: 12px;
}
.loader > span {
display: block;
animation: no-spin 1s linear infinite;
}
#keyframes spin {
0% {
transform: rotate(0deg);
}
100% {
transform: rotate(360deg);
}
}
#keyframes no-spin {
0% {
transform: rotate(360deg);
}
100% {
transform: rotate(0deg);
}
}
<div class="loader">
<span>LOGO</span>
</div>
Use the spin on a pseudo element
.loader {
position: relative;
width: 60px;
height: 60px;
text-align: center;
line-height: 60px;
margin: 10px auto;
font-size: 12px;
}
.loader::after {
content: '';
position: absolute;
top: 0; left: 0;
border: 5px solid #f3f3f3;
border-radius: 50%;
border-top: 5px solid #fff;
width: 100%;
height: 100%;
box-sizing: border-box;
animation: spin 1s linear infinite;
}
#keyframes spin {
0% {
transform: rotate(0deg);
}
100% {
transform: rotate(360deg);
}
}
<div class="loader">
<span>LOGO</span>
</div>
I know it's a noob questioin but I got stuck on this thing.
How to center vertically and horizontally "slide-loading" div in this situation?
.blueimp-gallery > .slides > .slide-loading
Element with class "blueimp-gallery" has position fixed.
Element with class "slides" has position relative.
Element with class "slide-loading" is a simple CSS preloader (without specified position).
.blueimp-gallery > .slides > .slide-loading {
border: 4px solid #f3f3f3;
border-radius: 50%;
border-top: 4px solid #3498db;
width: 60px;
height: 60px;
-webkit-animation: spin 1s linear infinite;
animation: spin 1s linear infinite;
}
#-webkit-keyframes spin {
0% { -webkit-transform: rotate(0deg); }
100% { -webkit-transform: rotate(360deg); }
}
#keyframes spin {
0% { transform: rotate(0deg); }
100% { transform: rotate(360deg); }
}
SOLUTION:
You can achieve this using the transform css property, using the following:
position: absolute;
top: calc(50% - 30px); //minus half the height of your spinner (30px)
left: calc(50% - 30px); //minus half the width of your spinner (30px)
transform: translate(-50%, -50%);
jsFIDDLE
CODE SNIPPET:
body {
margin: 0;
}
* {
box-sizing: border-box;
}
.rulerX,
.rulerY {
position: absolute;
z-index: 9999;
background-color: red;
}
.rulerX {
top: calc(50% - .5px);
height: 1px;
width: 100%;
}
.rulerY {
left: calc(50% - .5px);
width: 1px;
height: 100%;
}
.blueimp-gallery {
position: relative;
border: 3px solid royalblue;
height: 100vh;
box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
}
.slides {
height: 100%;
border: 3px dotted white;
position: relative;
background-color: #262626;
}
#-webkit-keyframes spin {
0% {
-webkit-transform: rotate(0deg);
}
100% {
-webkit-transform: rotate(360deg);
}
}
#keyframes spin {
0% {
transform: rotate(0deg);
}
100% {
transform: rotate(360deg);
}
}
.blueimp-gallery > .slides > .slide-loading {
border: 4px solid #f3f3f3;
border-radius: 50%;
border-top: 4px solid #3498db;
width: 60px;
height: 60px;
-webkit-animation: spin 1s linear infinite;
animation: spin 1s linear infinite;
position: absolute;
top: calc(50% - 30px);
left: calc(50% - 30px);
transform: translate(-50%, -50%);
}
<div class="blueimp-gallery">
<div class="rulerX"></div>
<div class="rulerY"></div>
<div class="slides">
<div class="slide-loading">
</div>
</div>
</div>