SOURCE

console 命令行工具 X clear

                    
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console
<svg>
  <defs>
    <g id="mySvg">
    <polygon points="50,0 80,30 20,30 50,0"/>
    <rect x="40" y="30" width="20" height="50"/>
  </g>
  </defs>
  <use href="#mySvg" x="80" y="0" fill="red"/>
</svg>