#How to build a vector graphics app in javascript code#

#How to build a vector graphics app in javascript code#

Extra SVG code increases the size of your HTML file.Duplication makes for resource-intensive maintenance. This method is only suitable if you're using the SVG in only one place.You can make SVG markup into a hyperlink by wrapping it in an element.Inlining SVG is the only approach that lets you use CSS interactions (like :focus) and CSS animations on your SVG image (even in your regular stylesheet.).In fact, you can use any SVG presentation attribute as a CSS property. You can assign classes and ids to SVG elements and style them with CSS, either within the SVG or wherever you put the CSS style rules for your HTML document.Putting your SVG inline saves an HTTP request, and therefore can reduce a bit your loading time.Raster graphics are arguably better for complex precision images such asВ photos, for the reasons described above. SVG is not supported in older browsers, so may not be suitable if you need to support older versions of Internet Explorer with your web site (SVG started being supported as of IE9.).SVG can be harder to create than raster images, depending on what kind of image you are trying to create.SVG can get complicated very quickly, meaning that file sizes can grow complex SVGs can also take significant processing time in the browser.So why would anyone want to use raster graphics over SVG? Well, SVG does have some disadvantages: SVGs lend themselves well to styling/scripting, because each component of the image is an element that can be styled via CSS or scripted via JavaScript.Text in vector images remains accessible (which also benefits your SEO).SVG has some additional advantages besides those described so far: These packages allow you to create a variety of illustrations using various graphics tools, and create approximations of photos (for example Inkscape's Trace Bitmap feature.)

For creating SVG images, most people use a vector graphics editor like Inkscape or Illustrator. Yes, you can handcode simple SVG in a text editor, but for a complex image this quickly starts to get very difficult. The vector image however continues to look nice and crisp, because no matter what size it is, the algorithms are used to work out the shapes in the image, with the values being scaled as it gets bigger.ДЇrom the example above, you may get the impression that SVG is easy to handcode. When it is zoomed, each pixel is increased in size to fill multiple pixels on screen, so the image starts to look blocky.

The difference becomes apparent when you zoom in the page - the PNG image becomes pixelated as you zoom in because it contains information on where each pixel should be (and what color). The difference is that the left one is a PNG, and the right one is an SVG image.

You can find this example live on our Github repo as vector-versus-raster.html - it shows two seemingly identical images side by side, of a red star with a black drop shadow. To give you an idea of the difference between the two, let's look at an example. The SVG format allows us to create powerful vector graphics for use on the Web.

Vector images are defined using algorithms - a vector image file contains shape and path definitions that the computer can use to work out what the image should look like when rendered on the screen.

Popular web raster formats include Bitmap (.

Raster images are defined using a grid of pixels - a raster image file contains information showing exactly where each pixel is to be placed, and exactly what color it should be.

On the web, you'll work with two types of images - raster images, and vector images: