svg总结

getTotalLength()获取图形总长度

<body>

    <svg width=600 height=600 style="border:1px solid rgb(6, 6, 5);" id="svg">
        <rect x=200 y=200 width=200 height=200 stroke="red" fill="#f3f3f3" id="rect"></rect>
    </svg>
    <script>
        var rect = document.getElementById('rect')
        // getTotalLength()获取图形总长度
        console.log('getTotalLength()获取图形总长度',rect.getTotalLength());
    </script>

</body>

getPointAtLength(x)：获取路径（path）上距离起始点长度为x的点的坐标

<body>

    <svg width=600 height=600 style="border:1px solid rgb(6, 6, 5);" id="svg">
        <rect x=200 y=200 width=200 height=200 stroke="red" fill="#f3f3f3" id="rect"></rect>
    </svg>
    <svg width=600 height=600 style="border:1px solid black;" id="svg">
        <path d="M 0 50 h 100" stroke="blue" id="path1"></path>
      </svg>
  
    <script>
        //  getPointAtLength(x)：获取路径（path）上距离起始点长度为x的点的坐标
        var rect = document.getElementById('rect') 
        console.log('rect:',rect.getPointAtLength(50));
      
        var path1 = document.getElementById('path1');
        console.log('path',path1.getPointAtLength(50));

  </script>

</body>

svg知识总结（2）——与JavaScript相关知识