[Solved]-How To Move (Drag and Drop) multiple Shapes with D3-d3.js

the drag behaviour needs to be called on the selection whose position you're updating during the drag. in your code, you are updating the position of the parent node, which causes strange "jittering", because the drag position is itself relative to the parent node.

for example, you could replace your move function above with:

function move() {
  d3.select(this)
      .attr("transform", "translate(" + d3.event.x + "," + d3.event.y + ")");
}