How To Create Svg Elements With Typescript

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Typescript is an open source language developed by Microsoft that is a superset of the JavaScript language. It adds features like type checking, classes, modules and more, allowing developers to write code more quickly and reliably. Typescript is becoming increasingly popular for web development and it can also be used to create SVG elements. In this article, we will look at how to use Typescript to create SVG elements.

SVG stands for Scalable Vector Graphics. It is an XML-based vector image format for two-dimensional graphics used on the web. SVG can be used to create a wide range of graphical elements, from simple shapes to complex designs. Creating SVG elements with Typescript is relatively straightforward and can be done in just a few lines of code.

Table of Contents

Creating an SVG Element

The first step is to create a new SVG element. To do this, you can use the document.createElementNS() method. This method takes two parameters: the namespace URI and the qualified name of the element. The namespace URI is the URL of the SVG namespace and the qualified name is the element name. For example, to create an SVG circle element, you would use the following code:

let circle = document.createElementNS('http://www.w3.org/2000/svg', 'circle');

Once you have created your SVG element, you can then use the setAttribute() method to set any attributes you wish. This method takes two parameters: the attribute name and the attribute value. For example, to set the radius of the circle, you could use the following code:

circle.setAttribute('r', '50');

You can also use the appendChild() method to add the new element to the DOM. This method takes one parameter: the new element. For example, to add the circle to the DOM, you could use the following code:

document.body.appendChild(circle);

Using Typescript Classes

Typescript also allows you to create classes for your SVG elements. For example, you could create a class for a circle element like so:

class Circle { 
 constructor(radius: number) { 
 this.radius = radius; 
 } 
 
 public radius: number; 
 }

You can then use the new keyword to create an instance of the Circle class. This will create an SVG circle element with the specified radius. For example, to create a circle with a radius of 50px, you could use the following code:

let circle = new Circle(50);

You can then use the same methods as before to add the element to the DOM. For example, to add the circle to the DOM, you could use the following code:

document.body.appendChild(circle.element);

Using Typescript Functions

Typescript also allows you to create functions to create SVG elements. For example, you could create a function to create a circle element like so:

function createCircle(radius: number): SVGElement { 
 let circle = document.createElementNS('http://www.w3.org/2000/svg', 'circle'); 
 circle.setAttribute('r', radius); 
 return circle; 
 }

You can then use this function to create an SVG circle element with the specified radius. For example, to create a circle with a radius of 50px, you could use the following code:

let circle = createCircle(50);

You can then use the same methods as before to add the element to the DOM. For example, to add the circle to the DOM, you could use the following code:

document.body.appendChild(circle);

Conclusion

In this article, we have looked at how to use Typescript to create SVG elements. We have seen how to use the document.createElementNS() method, Typescript classes and Typescript functions to create SVG elements. We have also seen how to set attributes and add elements to the DOM. Hopefully, this has given you the knowledge you need to start creating your own SVG elements with Typescript.