files/en-us/web/svg/reference/attribute/edgemode/index.md
The edgeMode attribute determines how to extend the input image as necessary with color values so that the matrix operations can be applied when the kernel is positioned at or near the edge of the input image.
You can use this attribute with the following SVG elements:
For {{SVGElement("feConvolveMatrix")}}, edgeMode determines how to extend the input image as necessary with color values so that the matrix operations can be applied when the kernel is positioned at or near the edge of the input image.
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For {{SVGElement("feGaussianBlur")}}, edgeMode determines how to extend the input image as necessary with color values so that the matrix operations can be applied when the kernel is positioned at or near the edge of the input image.
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{{Specifications}}