SVG operator Attribute

The operator attribute either defines the compositing operation or morphing operation to be performed. The elements that are using this attribute includes: <feComposite> and <feMorphology>.

Syntax:

operator = erode|dilate|over|arithmetic|out|atop|xor|lighter|in

Attribute Values: The operator attribute accepts the values mentioned above and described below

over: It shows that the source graphic defined in the in attribute is placed over the destination graphic defined in the in2 attribute.
in: It shows that the parts of the source graphic defined in the in attribute replace the destination graphic defined in the in2 attribute.
out: It shows that the parts of the source graphic defined in the in attribute are displayed.
atop: It shows that the parts of the source graphic which overlap the destination graphic, replace the destination graphic.
xor: It shows that the non-overlapping regions of the source graphic defined in the in attribute are combined with the destination graphic defined in the in2 attribute.
lighter: It shows that the sum of the source graphic and the destination graphic defined in the in and in2 attribute respectively, is displayed.
arithmetic: It shows that the source graphic and the destination graphic defined in the in and in2 attribute respectively are combined using the following formula: result = k1*i1*i2 + k2*i1 + k3*i2 + k4
erode: It thins the source graphic defined in the in attribute.
dilate: It fattens the source graphic defined in the in attribute.

Below examples illustrate the use of operator attribute.

Example 1:

HTML

<!DOCTYPE html>
<html>

<body>
    <h1 style="color: green;">
        GeeksforGeeks
    </h1>

    <svg viewBox="0 0 420 70" 
        xmlns="http://www.w3.org/2000/svg">
        
        <filter id="thin">
            <feMorphology operator="erode" radius="0.4" />
        </filter>

        <text x="10" y="20" fill="green" filter="url(#thin)">
            Thin text
        </text>
    </svg>
</body>

</html>

Output:

Example 2:

HTML

<!DOCTYPE html>
<html>

<body>
    <h1 style="color: green;">
        GeeksforGeeks
    </h1>

    <svg viewBox="0 0 420 70" 
        xmlns="http://www.w3.org/2000/svg">

        <filter id="fat">
            <feMorphology operator="dilate" radius="0.8" />
        </filter>

        <text x="10" y="20" fill="green" filter="url(#fat)">
            Fat text
        </text>
    </svg>
</body>

</html>

Output:

Explore