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svg_basics

What is SVG?​

  • SVG (Scalable Vector Graphics) is a markup language for describing 2D vector images.
  • Syntax is similar to HTML.
  • All SVGs start with a root <svg> element.

SVG Shapes​

elementdescription
<rect>rectangles
<circle>circles
<polygon>custom shapes
<line>lines
<text>text
  • Controlled via attributes like:
    • x, y, width, height, r, cx, cy, points
    • fill and stroke for color and borders

Styling SVGs​

  • SVG elements can be styled with CSS.
  • CSS properties like fill, stroke, and stroke-width are supported.
  • Enables animations and transitions.
  • Some CSS features don’t work with SVG and vice versa.

Layout Differences​

  • SVGs do not have an automatic layout engine like HTML.
  • Elements stack on top of each other unless explicitly positioned.
  • Use attributes like x, y, or transform to control placement.

Embedding SVGs​

Inline​

  • SVG code is written directly into HTML.
  • Allows full styling and JavaScript interaction.
  • Increases DOM size.

External​

  • SVG is referenced as an image using <img> or background-image.
  • Reduces DOM size and allows caching.
  • Limited in styling and animation control.
  • External SVGs must include xmlns

References