The operator attribute as two meaning based on the context it's used.
<feComposite> element, it defines the compositing operation that is to be performed.<feMorphology> element, it defines whether to erode (i.e., thin) or dilate (fatten) the source graphic.<feComposite> element| Categories | None |
|---|---|
| Value |
over | in | out | atop | xor | arithmetic
|
| Animatable | Yes |
| Normative document | SVG 1.1 (2nd Edition) |
<feMorphology> element| Categories | None |
|---|---|
| Value |
erode | dilate
|
| Animatable | Yes |
| Normative document | SVG 1.1 (2nd Edition) |
The following elements can use the operator attribute
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https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/operator