sfcode
An Online Competing and Development Environment
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Check if a string or buffer is SVG
This module performs a quick-and-dirty check. It's fast, but in certain cases it will give incorrect results.
true
for an SVG-like string that isn't well-formed or valid: <svg><div></svg>
If you want to make certain that your SVG is valid, try parsing it with libxmljs.
MIT © Sindre Sorhus