How to draw a path smoothly from start point to end point in D3.js

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You can animate paths quite easily with stroke-dashoffset and and path.getTotalLength()

var totalLength = path.node().getTotalLength();

path
  .attr("stroke-dasharray", totalLength + " " + totalLength)
  .attr("stroke-dashoffset", totalLength)
  .transition()
    .duration(2000)
    .ease("linear")
    .attr("stroke-dashoffset", 0);

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