The SVG Canvas, Coordinate System, And Viewport

When you see SVG images on the screen you’re viewing only part of the canvas on which they’re drawn and you view the canvas through the SVG viewport. Canvas and viewport are both independent and connected and their relationship can be confusing and lead to unexpected results at times. That is until you understand the relationship and how to control the connection.

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REMs And Viewport Measurements — Why You Shouldn’t Use Them Yet

Designing for the web means designing flexibly. It means dropping absolute measurements and adopting relative ones like em and %. There will be exceptions, but for most things you should be using relative measurements.

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