The opacity
defines the opacity level of an element.
opacity: value;
opacity
takes a value from 0 to 1 where 0 is completely transparent and 1 is fully opaque.
.div1 {
opacity: 0;
}
.div2 {
opacity: 0.5;
}
.div3 {
opacity: 1;
}
value: sets the opacity of an element. ( 0 to 1 )