Javascript 要素をドラッグで移動

td要素の中にあるdiv要素をドラッグで別のtd要素の中に移動。div要素にはinputタグでデータを持たせクリック時に取得。

<!DOCTYPE html>
<html lang="ja">
<head>
  <meta charset="UTF-8">
  <title>test</title>

  <style>

  *{
    margin: 0;
    padding: 0;
  }

  td{
    border: solid 1px #ccc;
    width:300px;
    height:300px;
  }

  .container{
    background-color: black;
    padding: 2px;

    height: 40px;
    width: 290px;
    display: flex;
    flex-wrap: wrap;
  }

  .moveArea{
    width: 10%;
    background-color: red;
  }


  .textArea{
    width: 89%;
    background-color: green;
  }

  .dataArea{
    width: 1%;
    background-color: blue;
  }

  .drag {
    cursor: move;
    position: absolute;
    z-index: 1000;
  }

  </style>
</head>
<body>

<table>
<tr><td></td><td></td><tr>
<tr><td></td><td id="start"></td><tr>
</table>

<input type="textbox" id="target_id">
<input type="textbox" id="target_age">

<script>

window.onload = startup;

function startup(){
  
  setup_rect({"caption":"A部品","id":"1","age":"2"});
  setup_rect({"caption":"B部品","id":"2","age":"3"});

}

function setup_rect(value_list){

  let containerElement = document.createElement("div");
  containerElement.classList.add("container");

  let moveAreaElement = document.createElement("div");
  moveAreaElement.addEventListener('mousedown', mouse_down);
  moveAreaElement.innerHTML = "";
  moveAreaElement.classList.add("moveArea");
  containerElement.appendChild(moveAreaElement);

  let textAreaElement = document.createElement("div");
  textAreaElement.addEventListener('click', text_click);
  textAreaElement.innerHTML = value_list["caption"];
  textAreaElement.classList.add("textArea");
  containerElement.appendChild(textAreaElement);

  let dataAreaElement = document.createElement("div");
  dataAreaElement.innerHTML = 
  "<input type='hidden' name='id' value='" + value_list["id"] + "'>" + 
  "<input type='hidden' name='age' value='" + value_list["age"] + "'>";
  dataAreaElement.classList.add("dataArea");
  containerElement.appendChild(dataAreaElement);

  let target = document.querySelector("#start");
  target.appendChild(containerElement);
}

function text_click(event){

  let target_id = document.getElementById("target_id");
  let target_age = document.getElementById("target_age");

  for(let el of this.nextElementSibling.children){

    if (el.getAttribute("name") === "id") target_id.setAttribute("value", el.getAttribute("value"));
    if (el.getAttribute("name") === "age") target_age.setAttribute("value", el.getAttribute("value"));
    
  }
}

function mouse_move(event){

  let target = document.getElementsByClassName("drag")[0];

  let x = event.pageX - spaceX;
  let y = event.pageY - spaceY;

  target.style.top = y + "px";
  target.style.left = x + "px";
}

let spaceX = 0;
let spaceY = 0;

function mouse_down(event){

  spaceX = event.offsetX;
  spaceY = event.offsetY;

  let target = this.parentNode;
  target.classList.add("drag");

  mouse_move(event);
  document.addEventListener('mousemove', mouse_move);
  target.addEventListener('mouseup', mouse_up);
}

function mouse_up(event){

  spaceX = 0;
  spaceY = 0;

  this.classList.remove("drag");
  document.removeEventListener("mousemove", mouse_move);
  this.removeEventListener('mouseup', mouse_up);

  let x = event.clientX;
  let y = event.clientY;

  let el = document.elementFromPoint(x,y);
  if (el.tagName === "TD") el.appendChild(this);
}

</script>

</body>
</html>

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<!DOCTYPE html>

<head>

<style>

margin: 0;

padding: 0;

}

td{

border: solid 1px #ccc;

width:300px;

height:300px;

}

.container{

background-color: black;

padding: 2px;

height: 40px;

width: 290px;

display: flex;

flex-wrap: wrap;

}

.moveArea{

width: 10%;

background-color: red;

}

.textArea{

width: 89%;

background-color: green;

}

.dataArea{

width: 1%;

background-color: blue;

}

.drag {

cursor: move;

position: absolute;

z-index: 1000;

}

</style>

</head>

<body>

<table>

</table>

window.onload = startup;

function startup(){

setup_rect({"caption":"A部品","id":"1","age":"2"});

setup_rect({"caption":"B部品","id":"2","age":"3"});

}

function setup_rect(value_list){

let containerElement = document.createElement("div");

containerElement.classList.add("container");

let moveAreaElement = document.createElement("div");

moveAreaElement.addEventListener('mousedown', mouse_down);

moveAreaElement.innerHTML = "";

moveAreaElement.classList.add("moveArea");

containerElement.appendChild(moveAreaElement);

let textAreaElement = document.createElement("div");

textAreaElement.addEventListener('click', text_click);

textAreaElement.innerHTML = value_list["caption"];

textAreaElement.classList.add("textArea");

containerElement.appendChild(textAreaElement);

let dataAreaElement = document.createElement("div");

dataAreaElement.innerHTML =

"<input type='hidden' name='id' value='" + value_list["id"] + "'>" +

"<input type='hidden' name='age' value='" + value_list["age"] + "'>";

dataAreaElement.classList.add("dataArea");

containerElement.appendChild(dataAreaElement);

let target = document.querySelector("#start");

target.appendChild(containerElement);

}

function text_click(event){

let target_id = document.getElementById("target_id");

let target_age = document.getElementById("target_age");

for(let el of this.nextElementSibling.children){

if (el.getAttribute("name") === "id") target_id.setAttribute("value", el.getAttribute("value"));

if (el.getAttribute("name") === "age") target_age.setAttribute("value", el.getAttribute("value"));

}

function mouse_move(event){

let target = document.getElementsByClassName("drag")[0];

let x = event.pageX - spaceX;

let y = event.pageY - spaceY;

target.style.top = y + "px";

target.style.left = x + "px";

}

let spaceX = 0;

let spaceY = 0;

function mouse_down(event){

spaceX = event.offsetX;

spaceY = event.offsetY;

let target = this.parentNode;

target.classList.add("drag");

mouse_move(event);

document.addEventListener('mousemove', mouse_move);

target.addEventListener('mouseup', mouse_up);

}

function mouse_up(event){

spaceX = 0;

spaceY = 0;

this.classList.remove("drag");

document.removeEventListener("mousemove", mouse_move);

this.removeEventListener('mouseup', mouse_up);

let x = event.clientX;

let y = event.clientY;

let el = document.elementFromPoint(x,y);

if (el.tagName === "TD") el.appendChild(this);

}

</script>

</body>

</html>