--- id: 587d7fa8367417b2b2512bcb title: Learn About SVG in D3 challengeType: 6 forumTopicId: 301489 dashedName: learn-about-svg-in-d3 --- # --description-- SVG stands for Scalable Vector Graphics. Here "scalable" means that, if you zoom in or out on an object, it would not appear pixelated. It scales with the display system, whether it's on a small mobile screen or a large TV monitor. SVG is used to make common geometric shapes. Since D3 maps data into a visual representation, it uses SVG to create the shapes for the visualization. SVG shapes for a web page must go within an HTML `svg` tag. CSS can be scalable when styles use relative units (such as `vh`, `vw`, or percentages), but using SVG is more flexible to build data visualizations. # --instructions-- Add an `svg` node to the `body` using `append()`. Give it a `width` attribute set to the provided `w` constant and a `height` attribute set to the provided `h` constant using the `attr()` or `style()` methods for each. You'll see it in the output because there's a `background-color` of pink applied to it in the `style` tag. **Note** When using `attr()` width and height attributes do not have units. This is the building block of scaling - the element will always have a 5:1 width to height ratio, no matter what the zoom level is. # --hints-- Your document should have 1 `svg` element. ```js assert($('svg').length == 1); ``` The `svg` element should have a `width` attribute set to 500 or styled to have a width of 500px. ```js assert($('svg').attr('width') == '500' || $('svg').css('width') == '500px'); ``` The `svg` element should have a `height` attribute set to 100 or styled to have a height of 100px. ```js assert($('svg').attr('height') == '100' || $('svg').css('height') == '100px'); ``` # --seed-- ## --seed-contents-- ```html ``` # --solutions-- ```html ```