How To Create A Circle Using Svg

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In today’s digital world, the ability to create vector graphics and shapes is a must. SVG (Scalable Vector Graphics) is an XML-based vector image format for two-dimensional graphics with support for interactivity and animation. SVG allows for interactive and powerful graphics to be created for websites, apps, and more. One of the most common shapes created in SVG is the circle. In this article, we will look at how to create a circle using SVG.

SVG is composed of elements that represent the various shapes that can be created. To create a circle, the element is used. This element requires the attributes cx, cy, and r, which stand for the x-coordinate, y-coordinate, and radius of the circle, respectively. The cx and cy attributes define the center of the circle while the r attribute defines the radius. The following example shows how to create a circle with a radius of 10 at the coordinates (100,100):

In addition to the attributes mentioned above, the element also accepts other attributes such as fill, stroke, and stroke-width. The fill attribute defines the color of the circle and can either be a color name or a hexadecimal value. The stroke attribute defines the color of the outline of the circle and the stroke-width attribute defines the thickness of the circle’s outline. The following example creates a green circle with a black outline and a stroke width of 3:

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Animating the Circle

One of the advantages of using SVG is the ability to animate the shapes. To animate a circle, the element is used. This element requires attributes such as attributeName, from, to, and dur which define the animation type, start state, end state, and duration of the animation, respectively. The following example animates a circle from a radius of 10 to a radius of 20 over a duration of 2 seconds:

Interacting With the Circle

In addition to animating the shapes, SVG also allows for user interaction. The element can be made interactive by adding the attribute. This attribute allows for a function to be called when the circle is clicked. For example, the following example creates a circle that calls the function myFunction when clicked:

Using SVG with JavaScript

SVG can also be used with JavaScript for more complex and interactive graphics. To create a circle with JavaScript, the createElementNS() method is used. This method creates a new element in an SVG document and requires two arguments, the namespace URI and the element name. The following example creates a circle with a radius of 10 at the coordinates (100,100) with JavaScript:

The createElementNS() method also accepts optional attributes such as fill, stroke, and stroke-width. The following example creates a green circle with a black outline and a stroke width of 3:

var circle = document.createElementNS(“http://www.w3.org/2000/svg”, “circle”);
circle.setAttribute(“cx”, 100);
circle.setAttribute(“cy”, 100);
circle.setAttribute(“r”, 10);
circle.setAttribute(“fill”, “green”);
circle.setAttribute(“stroke”, “black”);
circle.setAttribute(“stroke-width”, 3);
document.appendChild(circle);

Conclusion

SVG is a powerful way to create vector graphics and shapes for websites, apps, and more. The element is used to create circles and requires the attributes cx, cy, and r to define the x-coordinate, y-coordinate, and radius of the circle, respectively. The element also accepts other attributes such as fill, stroke, and stroke-width. SVG also allows for animation and user interaction with the and elements, respectively. SVG can also be used with JavaScript for more complex and interactive graphics.

In this article, we looked at how to create a circle using SVG. We saw how to create a circle, animate it, and make it interactive. We also looked at how to create a circle with JavaScript. With this information, you should now have the knowledge to create circles with SVG.