solution,Just try this feature

[564239493]

/**

• @param {string} moves

• @return {boolean}
  */
  var judgeCircle = function(moves) {
  var xDistance = 0;
  var yDistance = 0;

  var moveArray = moves.split("");
  for(let i=0;i<moveArray.length;i++){
  if(moveArray[i] == "U"){
  yDistance++;
  }
  if(moveArray[i] == "D"){
  yDistance--;
  }
  if(moveArray[i] == "R"){
  xDistance++;
  }
  if(moveArray[i] == "L"){
  xDistance--;
  }
  }
  return xDistance == 0 && yDistance == 0;
  };