Note: This function is similar to the more established
opacity property. The difference is that with filters, some browsers provide hardware acceleration for better performance.
<percentage>. A value of
0%is completely transparent, while a value of
100%leaves the input unchanged. Values between
100%are linear multipliers on the effect. The lacuna value for interpolation is
opacity(0%) /* Completely transparent */ opacity(50%) /* 50% transparent */ opacity(1) /* No effect */
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