[3.3.x] Styles Support & Discussion • CSS Preload images?

Code:

/* Preloading CSS Background Images */body::before {  content: url("./images/morning_bg.png");  content: url("./images/day_bg.png");  content: url("./images/midday_bg.png");  content: url("./images/afternoon_bg.png");  content: url("./images/evening_bg.png");  content: url("./images/goodnight_bg.png");  display: none;}