Here's a rewrite of my mindmap script using dataviewjs

my input file is `Demo.md` with the following contents:
```markdown
- [ ] Root task
    - [ ] task 1.1
    - [ ] task 1.2
        - [ ] task 1.2.1
        - [ ] task 1.2.2
    - [ ] task 1.3
        - [ ] task 1.3.1
```

and my `dataviewjs` script is:
```javascript
function crawl(subtasks) {
  let size = subtasks.length > 0 ? 0 : 1; //if no children then a leaf with size 1
  for (let task of subtasks) {
    task["size"] = crawl(task.subtasks);
    size += task.size;
  }
  return size;
}

const tasks = dv.page("Demo.md").file.tasks[0];
tasks["size"] = crawl(tasks.subtasks);

const width = 300;
const height = 100;
const ea = ExcalidrawAutomate;
ea.reset();

function buildMindmap(subtasks, depth, offset, parentObjectID) {
  if (subtasks.length == 0) return;
  for (let task of subtasks) {
    if (depth == 1) ea.style.strokeColor = '#'+(Math.random()*0xFFFFFF<<0).toString(16);
    task["objectID"] = ea.addText(depth*width,(task.size/2+offset)*height,task.text,{box:true})
    ea.connectObjects(parentObjectID,"right",task.objectID,"left",{startArrowHead: 'dot'});
    buildMindmap(task.subtasks, depth+1,offset,task.objectID);
    offset += task.size;
  }
}

tasks["objectID"] = ea.addText(0,(tasks.size/2)*height,tasks.text,{box:true});    
buildMindmap(tasks.subtasks, 1, 0, tasks.objectID);

(async ()=> {
  const svg = await ea.createSVG(); 
  const el=document.querySelector("div.block-language-dataviewjs"); 
  el.appendChild(svg); 
})();
```
And the output is: