public/src/app/diagram/diagram.component.html

<div style="overflow:auto; height:450px; padding: 0 1em; border: 1px solid #d9d9d9;">
  <svg id="diagram" #diagram align="center" #svgContainer>
    <svg width="100%" height="1300px" preserveAspectRatio="xMaxYMin meet" *ngFor="let item of list; let i = index" style="padding: 1em 0;"
      align="center">

      <svg [attr.width]="maxLengthLeft * 10">
        <text text-anchor="start" x="0" [attr.y]="40 * (i+1)" font-size="12" dy="0">
          <tspan x="0" dy=".6em" font-weight="bold">
            {{item.name1}}
          </tspan>
          <tspan x="0" dy="1.2em">
            {{item.p1}}
          </tspan>
        </text>
      </svg>

      <circle stroke="#8BC34A" fill="#8BC34A" [attr.cx]="maxLengthLeft * 8" [attr.cy]="44 * (i+1)" r="5" />

      <line [attr.x1]="maxLengthLeft * 8" [attr.y1]="44 * (i+1)" [attr.x2]="maxWidth - maxLengthRight * 8 - 30" [attr.y2]="44 * (i+1)"
        stroke-width="2" stroke="black" stroke-dasharray="5, 5" stroke="#8BC34A" fill="#8BC34A" class="line" />

      <circle [attr.cx]="maxWidth - maxLengthRight * 8 - 30" [attr.cy]="44 * (i+1)" r="5" stroke="#8BC34A" fill="#8BC34A" />

      <text text-anchor="start" [attr.x]="maxWidth - maxLengthRight * 8" [attr.y]="40 * (i+1)" font-size="12" dy="0">
        <tspan [attr.x]="maxWidth - maxLengthRight * 8" dy=".6em" font-weight="bold">
          {{item.name2}}
        </tspan>
        <tspan [attr.x]="maxWidth - maxLengthRight * 8" dy="1.2em">
          {{item.p2}}
        </tspan>
      </text>

    </svg>
  </svg>
</div>