The fill property provides much the same capabilities in SVG as the background-color and background-image properties do for HTML. Some behave like CSS properties that you apply to HTML, but are named differently. Some, like font-size, apply to both SVG and HTML. Many CSS properties such as fill and stroke apply only to SVG content. Other than the tendency of longer CSS property names to use dashes-between-lowercase-words rather than camelCase for attribute names, there may be no way to tell the difference by looking at them. These are simply CSS properties that happen to be expressed as attributes. In this example, the id, cx, cy, and r are all ordinary attributes, while the fill and stroke are known as presentation attributes. (See SVG shapes for more about basic graphic elements such as circles, ellipses, rectangles, and polygons.) Styling via CSS Declaring the larger circles first prevents them from obscuring the smaller ones: To add the iris and pupil, you can add more circles that specify different fill colors. Adding a fill attribute allows you to color the background white, and a stroke attribute helps clarify the edge of the shape:
The cx and cy attributes position its center point, and the r sizes it relative to that point: īy default, it’s filled black. (See SVG deployment for different ways to render SVG content.) The eyeballĪdding this line within the svg region produces a circle. You can add title and desc elements wherever necessary to comment your markup. The basic markup looks like this, with an svg element encapsulating the graphics: SVG grand tour demo eyeballs interactive demo showcasing several SVG features Examples used throughout this guide feature inline SVG that’s directly embedded within HTML, which allows you to flexibly apply CSS and JavaScript to both the SVG graphic and the HTML content. There are several ways to deploy SVG, with various options outlined in the section at the bottom of this page.
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It focuses on the unique way you can build complex interactive graphics from reusable components, and how to flexibly resize them and place them within various drawing surfaces.Īs part of a grand tour to get a feel for SVG markup, you’ll stroll through an example that shows how to build a pair of eyes, and how to move them around and make them blink. It highlights some notable differences, and provides a quick tour of many SVG features that are covered in more detail in other sections. This section of the guide shows how SVG is deployed along with other core web standards, with which you should already be familiar. Since SVG renders within the browser’s DOM, each graphic component can be styled through CSS, manipulated with JavaScript through core APIs, and can appear comfortably within HTML pages. Use SVG if you want to freely interact with portions of a graphic.
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In contrast, raster or paint-style images consist of a series of pixels that may not display well when zoomed at high resolution. Vector or drawing-style graphics are implemented as pure shapes that render crisply at any magnification. SVG is a standard markup format, like HTML and XML, that renders Scalable Vector Graphics within web browsers. It shows how to maintain a set of reusable graphic components, and provides essential context on SVG transforms and coordinate spaces. This guide shows you how to build a pair of animating eyeballs, providing a comprehensive tour of SVG features detailed in other tutorials. The performance difference in switching between these two should typically be negligible. While most browsers support a basic implementation of Web Animations, we fallback to CSS Animations for browsers that do not support Web Animations. As a result, this allows the browser to make any optimizations it needs and ensures your animations run as smoothly as possible. In doing this, we offload all work required to compute and run your animations to the browser. Ionic Animations uses the Web Animations API to build and run your animations.
This reduces the scalability of your animations as the library is constantly computing values and using up CPU time. On top of that, many animation libraries use a JavaScript-driven approach to running animations where they handle the calculation of your animation's values at every step in a requestAnimationFrame loop. Developers are often limited by the libraries available to them as well as the hardware that their apps run on. As long as developers have access to v5.0 or greater of Ionic Framework, they will have access to all of Ionic Animations.īuilding efficient animations can be tricky. Developers do not need to be using a particular framework such as React or Angular, nor do they even need to be building an Ionic app. Ionic Animations is a utility that allows developers to build complex animations in a platform agnostic manner.