freeCodeCamp/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.md

---
id: 587d7fa8367417b2b2512bcb
title: Learn About SVG in D3
challengeType: 6
forumTopicId: 301489
dashedName: learn-about-svg-in-d3
---

# --description--

<dfn>SVG</dfn> stands for <dfn>Scalable Vector Graphics</dfn>.

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
<style>
  svg {
    background-color: pink;
  }
</style>
<body>
  <script>
    const dataset = [12, 31, 22, 17, 25, 18, 29, 14, 9];

    const w = 500;
    const h = 100;

    const svg = d3.select("body")
                  // Add your code below this line


                  // Add your code above this line
  </script>
</body>
```

# --solutions--

```html
<style>
  svg {
    background-color: pink;
  }
</style>
<body>
  <script>
    const dataset = [12, 31, 22, 17, 25, 18, 29, 14, 9];

    const w = 500;
    const h = 100;

    const svg = d3.select("body")
                  .append("svg")
                  .attr("width", w)
                  .attr("height", h)
  </script>
</body>
```
feat(challenge-md): Add initial markdown challenge files 2018-09-30 23:01:58 +01:00			`---`
			`id: 587d7fa8367417b2b2512bcb`
			`title: Learn About SVG in D3`
			`challengeType: 6`
fix(curriculum): Added forumTopicId to remaining 1200 challeng… (#36558) 2019-08-05 09:17:33 -07:00			`forumTopicId: 301489`
feat(curriculum): restore seed + solution to Chinese (#40683) * feat(tools): add seed/solution restore script * chore(curriculum): remove empty sections' markers * chore(curriculum): add seed + solution to Chinese * chore: remove old formatter * fix: update getChallenges parse translated challenges separately, without reference to the source * chore(curriculum): add dashedName to English * chore(curriculum): add dashedName to Chinese * refactor: remove unused challenge property 'name' * fix: relax dashedName requirement * fix: stray tag Remove stray `pre` tag from challenge file. Signed-off-by: nhcarrigan <nhcarrigan@gmail.com> Co-authored-by: nhcarrigan <nhcarrigan@gmail.com> 2021-01-13 03:31:00 +01:00			`dashedName: learn-about-svg-in-d3`
feat(challenge-md): Add initial markdown challenge files 2018-09-30 23:01:58 +01:00			`---`

Feat: add new Markdown parser (#39800) and change all the challenges to new `md` format. 2020-11-27 19:02:05 +01:00			`# --description--`

fix: use dfn instead of code tag (#36640) * Use dfn tags * remove misused <dfn> tags * Revert "remove misused <dfn> tags" This reverts commit b24968a96810f618d831410ac90a0bc452ebde50. * Update curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/fill-in-the-blank-with-placeholder-text.english.md Co-Authored-By: Randell Dawson <5313213+RandellDawson@users.noreply.github.com> * Make "array" lowercase Co-Authored-By: Randell Dawson <5313213+RandellDawson@users.noreply.github.com> * Fix dfn usage * Address last dfn tags 2019-10-27 15:45:37 -01:00			`<dfn>SVG</dfn> stands for <dfn>Scalable Vector Graphics</dfn>.`
Feat: add new Markdown parser (#39800) and change all the challenges to new `md` format. 2020-11-27 19:02:05 +01:00
feat(challenge-md): Add initial markdown challenge files 2018-09-30 23:01:58 +01:00			`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.`

Feat: add new Markdown parser (#39800) and change all the challenges to new `md` format. 2020-11-27 19:02:05 +01:00			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');`
feat(challenge-md): Add initial markdown challenge files 2018-09-30 23:01:58 +01:00			```

Feat: add new Markdown parser (#39800) and change all the challenges to new `md` format. 2020-11-27 19:02:05 +01:00			The `svg` element should have a `height` attribute set to 100 or styled to have a height of 100px.
feat(challenge-md): Add initial markdown challenge files 2018-09-30 23:01:58 +01:00
Feat: add new Markdown parser (#39800) and change all the challenges to new `md` format. 2020-11-27 19:02:05 +01:00			```js
			`assert($('svg').attr('height') == '100' \|\| $('svg').css('height') == '100px');`
			```
feat(challenge-md): Add initial markdown challenge files 2018-09-30 23:01:58 +01:00
Feat: add new Markdown parser (#39800) and change all the challenges to new `md` format. 2020-11-27 19:02:05 +01:00			`# --seed--`

			`## --seed-contents--`
feat(challenge-md): Add initial markdown challenge files 2018-09-30 23:01:58 +01:00
			```html
			`<style>`
			`svg {`
			`background-color: pink;`
			`}`
			`</style>`
			`<body>`
			`<script>`
			`const dataset = [12, 31, 22, 17, 25, 18, 29, 14, 9];`
fix(challenge-md): Fix quotes that failed in the transform 2018-10-08 01:01:53 +01:00
feat(challenge-md): Add initial markdown challenge files 2018-09-30 23:01:58 +01:00			`const w = 500;`
			`const h = 100;`
fix(challenge-md): Fix quotes that failed in the transform 2018-10-08 01:01:53 +01:00
feat(challenge-md): Add initial markdown challenge files 2018-09-30 23:01:58 +01:00			`const svg = d3.select("body")`
			`// Add your code below this line`
fix(challenge-md): Fix quotes that failed in the transform 2018-10-08 01:01:53 +01:00


feat(challenge-md): Add initial markdown challenge files 2018-09-30 23:01:58 +01:00			`// Add your code above this line`
			`</script>`
			`</body>`
			```

Feat: add new Markdown parser (#39800) and change all the challenges to new `md` format. 2020-11-27 19:02:05 +01:00			`# --solutions--`
feat(challenge-md): Add initial markdown challenge files 2018-09-30 23:01:58 +01:00
Add solution d3challenges (#38222) * added solutions to data visualization with D3 * Update add-a-tooltip-to-a-d3-element.english.md * Update add-attributes-to-the-circle-elements.english.md * Update add-axes-to-a-visualization.english.md * Update add-document-elements-with-d3.english.md * Update add-inline-styling-to-elements.english.md * Update add-labels-to-scatter-plot-circles.english.md * Update change-styles-based-on-data.english.md * Update change-the-color-of-an-svg-element.english.md * Update change-the-presentation-of-a-bar-chart.english.md * Update create-a-bar-for-each-data-point-in-the-set.english.md * Update create-a-linear-scale-with-d3.english.md * Update create-a-scatterplot-with-svg-circles.english.md * Update display-shapes-with-svg.english.md * Update dynamically-change-the-height-of-each-bar.english.md * Update dynamically-set-the-coordinates-for-each-bar.english.md * Update invert-svg-elements.english.md * Update learn-about-svg-in-d3.english.md * Update select-a-group-of-elements-with-d3.english.md * Update set-a-domain-and-a-range-on-a-scale.english.md * Update style-d3-labels.english.md * Update work-with-dynamic-data-in-d3.english.md * Update use-a-pre-defined-scale-to-place-elements.english.md * Update use-dynamic-scales.english.md * Update use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.english.md * Update work-with-data-in-d3.english.md 2020-04-24 17:04:53 +05:30			```html
			`<style>`
			`svg {`
			`background-color: pink;`
			`}`
			`</style>`
			`<body>`
			`<script>`
			`const dataset = [12, 31, 22, 17, 25, 18, 29, 14, 9];`

			`const w = 500;`
			`const h = 100;`

			`const svg = d3.select("body")`
			`.append("svg")`
			`.attr("width", w)`
			`.attr("height", h)`
			`</script>`
			`</body>`
feat(challenge-md): Add initial markdown challenge files 2018-09-30 23:01:58 +01:00			```