The opacity() CSS function applies transparency to the samples in the input image. Its result is a <filter-function>.
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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.
Syntax
opacity(amount)
Parameters
amount- The amount of the conversion, specified as a
<number>or a<percentage>. A value of0%is completely transparent, while a value of100%leaves the input unchanged. Values between0%and100%are linear multipliers on the effect. The lacuna value for interpolation is1.
Examples
opacity(0%) /* Completely transparent */ opacity(50%) /* 50% transparent */ opacity(1) /* No effect */
Specifications
| Specification | Status |
|---|---|
| Filter Effects Module Level 1 The definition of 'opacity()' in that specification. |
Working Draft |