<svg>

Baseline Widely available *

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨July 2015⁩.

* Some parts of this feature may have varying levels of support.

The <svg> SVG element is a container that defines a new coordinate system and viewport. It is used as the outermost element of SVG documents, but it can also be used to embed an SVG fragment inside an SVG or HTML document.

Note: The xmlns attribute is only required on the outermost svg element of SVG documents, or inside HTML documents with XML serialization. It is unnecessary for inner svg elements or inside HTML documents with HTML serialization.

Usage context

Categories	Container element, Structural element
Permitted content	Any number of the following elements, in any order: Animation elements Descriptive elements Shape elements Structural elements Gradient elements `<a>`, `<clipPath>`, `<filter>`, `<foreignObject>`, `<image>`, `<marker>`, `<mask>`, `<pattern>`, `<script>`, `<style>`, `<switch>`, `<text>`, `<view>`

Attributes

baseProfile Deprecated: The minimum SVG language profile that the document requires. Value type: <string>; Default value: none; Animatable: no
height: The displayed height of the rectangular viewport. (Not the height of its coordinate system.) Value type: <length> | <percentage>; Default value: auto; Animatable: yes
preserveAspectRatio: How the svg fragment must be deformed if it is displayed with a different aspect ratio. Value type: (none | xMinYMin | xMidYMin | xMaxYMin | xMinYMid | xMidYMid | xMaxYMid | xMinYMax | xMidYMax | xMaxYMax) (meet | slice)?; Default value: xMidYMid meet; Animatable: yes
version Deprecated: Which version of SVG is used for the inner content of the element. Value type: <number>; Default value: none; Animatable: no
viewBox: The SVG viewport coordinates for the current SVG fragment. Value type: <list-of-numbers>; Default value: none; Animatable: yes
width: The displayed width of the rectangular viewport. (Not the width of its coordinate system.) Value type: <length> | <percentage>; Default value: auto; Animatable: yes
x: The displayed x coordinate of the svg container. No effect on outermost svg elements. Value type: <length> | <percentage>; Default value: 0; Animatable: yes
y: The displayed y coordinate of the svg container. No effect on outermost svg elements. Value type: <length> | <percentage>; Default value: 0; Animatable: yes

Note: Starting with SVG2, x, y, width, and height are Geometry Properties, meaning these attributes can also be used as CSS properties.

html,
body,
svg {
  height: 100%;
}

html

<svg
  viewBox="0 0 300 100"
  xmlns="http://www.w3.org/2000/svg"
  stroke="red"
  fill="grey">
  <circle cx="50" cy="50" r="40" />
  <circle cx="150" cy="50" r="4" />

  <svg viewBox="0 0 10 10" x="200" width="100">
    <circle cx="5" cy="5" r="4" />
  </svg>
</svg>

Using dynamic viewport units

In this example, the height and width attributes on the svg element are set using the dynamic viewport value 60vmin, equivalent to 60% of the viewport's width or height, whichever is smaller.

<div class="resizer">
  <iframe
    class="resized"
    srcdoc='

html

<svg
  viewBox="0 0 400 400"
  xmlns="http://www.w3.org/2000/svg"
  height="60vmin"
  width="60vmin">
  <rect x="0" y="0" width="50%" height="50%" fill="tomato" opacity="0.75" />
  <rect
    x="25%"
    y="25%"
    width="50%"
    height="50%"
    fill="slategrey"
    opacity="0.75" />
  <rect x="50%" y="50%" width="50%" height="50%" fill="olive" opacity="0.75" />
  <rect
    x="0"
    y="0"
    width="100%"
    height="100%"
    stroke="cadetblue"
    stroke-width="0.5%"
    fill="none" />
</svg>

  '></iframe>
</div>

.resizer {
  display: flex;
  margin: 1rem;
  padding: 0;
  resize: both;
  overflow: hidden;
  border: 5px dotted red;
  height: 400px;
}
.resizer > .resized {
  flex-grow: 1;
  margin: 0;
  padding: 0;
  border: 0;
}

To change the iframe's dimensions try resizing the dotted red border from bottom right corner.