flutter_svg/example/assets/simple/dash_path.svg

<svg viewBox="0 0 200 200" version="1.1" xmlns="http://www.w3.org/2000/svg">

    <line stroke-width="2" stroke="black" stroke-dasharray="5, 5"              x1="10" y1="10" x2="190" y2="10" />
    <line stroke-width="2" stroke="black" stroke-dasharray="5, 10"             x1="10" y1="30" x2="190" y2="30" />
    <line stroke-width="2" stroke="black" stroke-dasharray="10, 5"             x1="10" y1="50" x2="190" y2="50" />
    <line stroke-width="2" stroke="black" stroke-dasharray="5, 1"              x1="10" y1="70" x2="190" y2="70" />
    <line stroke-width="2" stroke="black" stroke-dasharray="1, 5"              x1="10" y1="90" x2="190" y2="90" />
    <line stroke-width="2" stroke="black" stroke-dasharray="0.9"               x1="10" y1="110" x2="190" y2="110" />
    <line stroke-width="2" stroke="black" stroke-dasharray="15, 10, 5"         x1="10" y1="130" x2="190" y2="130" />
    <line stroke-width="2" stroke="black" stroke-dasharray="15, 10, 5, 10"     x1="10" y1="150" x2="190" y2="150" />
    <line stroke-width="2" stroke="black" stroke-dasharray="15, 10, 5, 10, 15" x1="10" y1="170" x2="190" y2="170" />
    <line stroke-width="2" stroke="black" stroke-dasharray="5, 5, 1, 5"        x1="10" y1="190" x2="190" y2="190" />

</svg>