The flood-opacity attribute indicates the opacity value to use across the current filter primitive subregion.
Note: As a presentation attribute, flood-opacity can be used as a CSS property.
As a presentation attribute, it can be applied to any element but it has effect only on the following two elements: <feFlood> and <feDropShadow>
html, body, svg {
height: 100%;
}
<svg viewBox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <filter id="flood1"> <feFlood flood-color="seagreen" flood-opacity="1" x="0" y="0" width="200" height="200"/> </filter> <filter id="flood2"> <feFlood flood-color="seagreen" flood-opacity="0.3" x="0" y="0" width="200" height="200"/> </filter> <rect x="0" y="0" width="200" height="200" style="filter: url(#flood1);" /> <rect x="0" y="0" width="200" height="200" style="filter: url(#flood2); transform: translateX(220px);" /> </svg>
Usage notes
| Value | <alpha-value> |
|---|---|
| Initial value | 1 |
| Animatable | Yes |
<alpha-value>- A number or percentage indicating the opacity value to use across the current filter primitive subregion.
A number of0or a percentage of0%represents a fully transparent color,1or100%represents a fully opaque color.
Specifications
| Specification | Status | Comment |
|---|---|---|
| Filter Effects Module Level 1 The definition of 'flood-opacity' in that specification. |
Working Draft | Aligned the value to the CSS <alpha-value> value. |
| Scalable Vector Graphics (SVG) 1.1 (Second Edition) The definition of 'flood-opacity' in that specification. |
Recommendation | Initial definition |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
flood-opacity | Chrome ? | Edge ? | Firefox ? | IE ? | Opera ? | Safari ? | WebView Android ? | Chrome Android ? | Firefox Android ? | Opera Android ? | Safari iOS ? | Samsung Internet Android ? |
Legend
- Compatibility unknown
- Compatibility unknown