Demo
https://jsfiddle.net/me7jb6f8/
Code
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>organizationTree</title>
<style>
* {
box-sizing: border-box;
padding: 0;
margin: 0;
}
.box {
position: absolute;
width: 9999px;
height: 9999px;
overflow: auto;
top: 300px;
}
.box-item {
width: 80px;
height: 30px;
border: 1px solid #ccc;
position: absolute;
text-align: center;
border-radius: 10px;
}
</style>
</head>
<body>
<div id="box" class="box"></div>
<script>
const box_el = document.getElementById("box");
const TREE_NODE_RECT = {
width: 80,
height: 30,
margin: 30,
};
const get_px = function(str){
return Number(str.replace('px',''))
}
function addChild(parent_el, current_depth, depth){
if(current_depth>=depth){
return;
}
const is_root = current_depth === 0;
const children_count = is_root?1:2;
for (let i = 0; i < children_count; i++) {
let child_el = document.createElement("div");
child_el.className = "box-item";
if(parent_el){
child_el.style.left = get_px(parent_el.style.left) -TREE_NODE_RECT.width * (Math.pow(2,depth-current_depth-1))*(i===0?-1:1) + "px";
child_el.style.top = get_px(parent_el.style.top) + TREE_NODE_RECT.margin * current_depth + "px";
child_el.innerHTML = parent_el.innerHTML+'_'+ i;
}else{
child_el.style.left = TREE_NODE_RECT.width *Math.pow(2,depth)+'px';;
child_el.innerHTML = '0';
}
box_el.appendChild(child_el);
addChild(child_el, current_depth+1, depth);
}
}
function createTree(depth) {
addChild(null, 0, depth);
}
createTree(5);
</script>
</body>
</html>
