How can I create a smooth gradient background Animation? - html

Question

I have created a div which has a gradient background, and I want to change this gradient. I applied a keyframes animation which changed background color instantly. How can I make this change smooth?
div {
width: 100px;
height: 100px;
background:linear-gradient(red, yellow);
animation-name: colorchange;
animation-duration: 5s;
-webkit-animation-name: colorchange;
animation-iteration-count: 5;
-webkit-animation-duration: 5s;
text-align: center;
}
#keyframes colorchange {
0% {background:linear-gradient(red, yellow) }
35% {background:linear-gradient(yellow, green) }
70% {background:linear-gradient(green, red) }
100%{background:linear-gradient(red, yellow)}
}
<div>
Gradient Background
</div>

Answer 1

Try this
div {
text-align: center;
width: 100px;
height: 90px;
color: #fff;
background: linear-gradient(0deg, red, yellow, green);
background-size: 400% 400%;
-webkit-animation: Gradient 15s ease infinite;
-moz-animation: Gradient 15s ease infinite;
animation: Gradient 15s ease infinite;
}
#-webkit-keyframes Gradient {
0% {
background-position: 50% 0%
}
50% {
background-position: 50% 100%
}
100% {
background-position: 50% 0%
}
}
#-moz-keyframes Gradient {
0% {
background-position: 50% 0%
}
50% {
background-position: 50% 100%
}
100% {
background-position: 50% 0%
}
}
#keyframes Gradient {
0% {
background-position: 50% 0%
}
50% {
background-position: 50% 100%
}
100% {
background-position: 50% 0%
}
}
<div> Text </div>

Answer 2

I might be wrong, but gradients don't support transitions.
There's a workaround I found in other related question:
https://medium.com/#dave_lunny/animating-css-gradients-using-only-css-d2fd7671e759

Answer 3

As far as I'm concerned, the smooth transition doesn't work with gradient backgrounds, only with straight colors.
You can create a large gradient background with many colors though, and use the transition to move it. This creates the illusion of the colors changing.
body {
width: 100wh;
height: 90vh;
color: #fff;
background: linear-gradient(-45deg, #EE7752, #E73C7E, #23A6D5, #23D5AB);
background-size: 400% 400%;
-webkit-animation: Gradient 15s ease infinite;
-moz-animation: Gradient 15s ease infinite;
animation: Gradient 15s ease infinite;
}
#-webkit-keyframes Gradient {
0% {
background-position: 0% 50%
}
50% {
background-position: 100% 50%
}
100% {
background-position: 0% 50%
}
}
#-moz-keyframes Gradient {
0% {
background-position: 0% 50%
}
50% {
background-position: 100% 50%
}
100% {
background-position: 0% 50%
}
}
#keyframes Gradient {
0% {
background-position: 0% 50%
}
50% {
background-position: 100% 50%
}
100% {
background-position: 0% 50%
}
}
h1,
h6 {
font-family: 'Open Sans';
font-weight: 300;
text-align: center;
position: absolute;
top: 45%;
right: 0;
left: 0;
}
<h1>Hello World!</h1>