---
id: 587d7fa8367417b2b2512bcb
title: Learn About SVG in D3
required:
- src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
challengeType: 6
---
## 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()
method 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
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.
## Tests
```yml
tests:
- text: Your document should have 1 svg
element.
testString: assert($('svg').length == 1, 'Your document should have 1 svg
element.');
- text: The svg
element should have a width
attribute set to 500.
testString: assert($('svg').attr('width') == '500', 'The svg
element should have a width
attribute set to 500.');
- text: The svg
element should have a height
attribute set to 100.
testString: assert($('svg').attr('height') == '100', 'The svg
element should have a height
attribute set to 100.');
```
## Challenge Seed
## Solution
```js
// solution required
```