Create Stunning SVG Stroke Animations with CSS: Export from AI to Web

Introduction

This article explains two principles for implementing stroke‑drawing animations on web pages using SVG, and also covers how to export SVG files from Adobe Illustrator.

Demo Effects

Examples of sweep and stroke animations are shown below:

Exporting SVG from Illustrator

Designers create a vector text (or proportionally scaled) in Illustrator, select all with the Direct Selection tool, right‑click to "Convert to Compound Path", then choose "Save As…" and select SVG format. The exported file contains path data.

Example of the exported SVG code (simplified) is shown below:

Corresponding CSS snippet to style the SVG:

Animation Principles

The animation relies on two CSS properties: stroke-dashoffset (the starting offset of the dash pattern) and stroke-dasharray (the pattern of dash and gap lengths). By either changing the offset while keeping dash lengths constant, or changing dash lengths while keeping the offset constant, the drawing effect is achieved.

Principle 1 – Change stroke-dashoffset

CSS example:

Principle 2 – Change stroke-dasharray

CSS example:

Getting the Path Length

To animate precisely, you need the total length of the path. In the example, the length is 633, which can be obtained with document.querySelectorAll("path")[index].getTotalLength().

Conclusion

By combining these two principles with CSS3 animations, you can create impressive sweep‑light effects that make slogans shine.