The by attribute specifies a relative offset value for an attribute that will be modified during an animation.
The starting value for the attribute is either indicated by specifying it as value for the attribute given in the attributeName or the from attribute.
Four elements are using this attribute: <animate>, <animateColor>, <animateMotion>, and <animateTransform>
html, body, svg {
height: 100%;
}
<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
<rect x="10" y="10" width="100" height="100">
<animate attributeName="width" fill="freeze" by="50" dur="3s"/>
</rect>
</svg>
Usage notes
| Value | See below |
|---|---|
| Default value | None |
| Animatable | No |
The exact value type for this attribute depends on the value of the attribute that will be animated.
When a list of values is defined via the values attribute, the by attribute is ignored.
Specifications
| Specification | Status | Comment |
|---|---|---|
| SVG Animations Level 2 The definition of 'by' in that specification. |
Editor's Draft | No change |
| Scalable Vector Graphics (SVG) 1.1 (Second Edition) The definition of 'by' 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.
No compatibility data found. Please contribute data for "svg.elements.animate.by" (depth: 1) to the MDN compatibility data repository.