YTDJ/css/shooting-star.css

:root {
  --shooting-star-duration: 3000ms;
  --shooting-star-angle: 10deg;
  --shooting-star-translate: 300px;
  --shooting-star-direction: 1; /* 1 or -1 */
}


/* From https://www.geeksforgeeks.org/how-to-create-shooting-star-animation-effect-using-css/ */
.shooting-stars-wrapper {
  position: fixed;
  width: 100%;
  height: 100%;
  -webkit-transform: scaleX(var(--shooting-star-direction)) rotateZ(var(--shooting-star-angle));

  transform: scaleX(var(--shooting-star-direction)) rotateZ(var(--shooting-star-angle));

}

.shooting-star {
  position: absolute;
  /* left: 50%; */
  top: 50%;
  height: 2px;
  border-radius: 885px;
  background: linear-gradient(-45deg, #eef0f5, rgba(0, 0, 255, 0));

  -webkit-filter: drop-shadow(0 0 6px #eef1f8);
  filter: drop-shadow(0 0 6px #d7dff0);

  -webkit-animation: tail var(--shooting-star-duration) ease-in-out 1,
    shooting var(--shooting-star-duration) ease-in-out 1;
  animation: tail var(--shooting-star-duration) ease-in-out 1,
    shooting var(--shooting-star-duration) ease-in-out 1;
}

/* .shooting-star.is-shooting {
  -webkit-animation: tail var(--shooting-star-duration) ease-in-out 1,
    shooting var(--shooting-star-duration) ease-in-out 1;
  animation: tail var(--shooting-star-duration) ease-in-out 1,
    shooting var(--shooting-star-duration) ease-in-out 1;
} */

/* Here we add before and after effect to star */
.shooting-star::before,
.shooting-star::after {
  content: "";
  position: absolute;
  top: calc(50% - 1px);
  right: 0;
  height: 2px;
  background: linear-gradient(
    -45deg,
    rgba(0, 0, 255, 0),
    #eaeef8,
    rgba(0, 0, 255, 0)
  );
  -webkit-transform: translateX(50%) rotateZ(45deg);
  transform: translateX(50%) rotateZ(45deg);
  border-radius: 100%;
  -webkit-animation: shining var(--shooting-star-duration) ease-in-out 1;
  animation: shining var(--shooting-star-duration) ease-in-out 1;
}
/* .shooting-star.is-shooting::before,
.shooting-star.is-shooting::after {
  -webkit-animation: shining var(--shooting-star-duration) ease-in-out 1;
  animation: shining var(--shooting-star-duration) ease-in-out 1;
} */
.shooting-star::after {
  -webkit-transform: translateX(50%) rotateZ(-45deg);
  transform: translateX(50%) rotateZ(-45deg);
}

/* Here we are adding location of each
nth-child, animations, delays, and
before and after effects to each
and every balls(stars) */
/* .shooting-star:nth-child(1) {
  top: calc(50% - -119px);
  left: calc(50% - 43px);
  -webkit-animation-delay: 4000ms;
  animation-delay: 4000ms;
}
.shooting-star:nth-child(1)::before,
.shooting-star:nth-child(1)::after {
  -webkit-animation-delay: 4000ms;
  animation-delay: 4000ms;
} */

/* This code will help to generate
effect in tail of star */
@keyframes tail {
  0% {
    width: 0;
  }
  30% {
    width: 100px;
  }
  100% {
    width: 0;
  }
}
@-webkit-keyframes tail {
  0% {
    width: 0;
  }
  30% {
    width: 100px;
  }
  100% {
    width: 0;
  }
}

/* This code will generate shining
effect in head of star */
@keyframes shining {
  0% {
    width: 0;
  }
  50% {
    width: 30px;
  }
  100% {
    width: 0;
  }
}
@-webkit-keyframes shining {
  0% {
    width: 0;
  }
  50% {
    width: 30px;
  }
  100% {
    width: 0;
  }
}

/* Here we make shooting effect */
@keyframes shooting {
  0% {
    -webkit-transform: translateX(0);
    transform: translateX(0);
  }
  100% {
    -webkit-transform: translateX(var(--shooting-star-translate));
    transform: translateX(var(--shooting-star-translate));
  }
}
@-webkit-keyframes shooting {
  0% {
    -webkit-transform: translateX(0);
    transform: translateX(0);
  }
  100% {
    -webkit-transform: translateX(var(--shooting-star-translate));
    transform: translateX(var(--shooting-star-translate));
  }
}