css transition is not working on gradients? [duplicate] - css

Question

This question already has answers here:
Use CSS3 transitions with gradient backgrounds
(19 answers)
Closed 1 year ago.
.body {
background-color: #18181a;
color: white;
font-size: 2.5rem;
margin-left: 0%;
border-radius: 5px;
}
.body .card{
background:linear-gradient(90deg, rgba(0,0,0,1) 0%, rgba(0,212,255,0) 100%),url("./images/yuuki_mikan_bg.jpg");
background-repeat: no-repeat;
background-position: right;
width: 90%;
height: 80%;
border-radius: 10px;
margin: 10px;
margin-left: auto;
margin-right: auto;
display: flex;
justify-content: space-between;
flex-direction: row-reverse;
transition: background 0.5s linear;
}
.body .card:hover {
background:linear-gradient(90deg, rgba(0,0,0,0.17690826330532217) 0%, rgba(0,212,255,0) 100%),url("./images/yuuki_mikan_bg.jpg");
background-position: right;
}
.body .card .card_img{
max-width: 80%;
max-height: 95%;
border-radius: 5px;
/* bottom: 9px; */
/* left: -10px; */
/* top: -10px; */
transition: 0.5s;
opacity: 1;
display: flex;
justify-content: flex-start;
align-self: center;
}
.body .card .card_name{
margin-right: 2%;
margin-top: auto;
margin-bottom: auto;
font-size: 2.5rem;
text-shadow: 0px 0px 18px black;
opacity: 1;
}
this is the code im using, whenever i hover over .card, it changes the background color but transition doesn't delay its transition time. If you want more context, this is the website my code is running at https://oniichann.tk/waifus

Answer 1

I believe the only animatable property on a background gradient is background-position.
You may be able to achieve what you're looking for by doing something like the following:
.card {
position: relative;
text-align: center;
color: white;
padding: 100px;
background: url("https://oniichann.tk/waifus/images/bg.jpg");
background-repeat: no-repeat;
background-position: right;
background-size: cover;
}
.card:before {
content: "";
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background: linear-gradient(
90deg,
rgba(0, 0, 0, 1) 0%,
rgba(0, 0, 0, 0) 100%
);
background-size: 200% 200%;
transition: background-position 0.5s linear;
}
.card:hover:before {
background-position: 100% 50%;
}
<div class="card"></div>