d3.js - 如何保持 SVG 标记的宽度和高度？

Question

如何在更改折线或线条或路径的笔画宽度时保持 SVG 标记的固定宽度和高度。
基本上我需要的是固定标记宽度和高度，它不应该根据元素的笔划宽度增长。

下面是我的代码/Editor

<?xml version="1.0"?><svg width="120" height="120" viewBox="0 0 120 120"
    xmlns="http://www.w3.org/2000/svg" version="1.1"><defs>
<marker id="Triangle" viewBox="0 0 10 10" refX="1" refY="5"
    markerWidth="6" markerHeight="6" orient="auto">
  <path d="M 0 0 L 10 5 L 0 10 z" />
</marker></defs><polyline points="10,90 50,80 90,20" fill="none" stroke="black" 
  stroke-width="2" marker-end="url(#Triangle)" /></svg>

Answer 1

设置 markerUnits="userSpaceOnUse"

<svg width="120" height="120" viewBox="0 0 120 120"
     xmlns="http://www.w3.org/2000/svg">
  <defs>
    <marker id="Triangle" viewBox="0 0 10 10" refX="1" refY="5" orient="auto"
            markerUnits="userSpaceOnUse" markerWidth="8" markerHeight="8">
      <path d="M 0 0 L 10 5 L 0 10 z" />
    </marker>
  </defs>
  <polyline points="10,90 50,80 90,20" fill="none" stroke="black" 
            stroke-width="3" marker-end="url(#Triangle)" />
  <polyline points="30,100 70,90 110,30" fill="none" stroke="black" 
            stroke-width="1" marker-end="url(#Triangle)" />
</svg>