ReactJs: Adding an element to the DOM tree Code Answer

Hello Developer, Hope you guys are doing great. Today at Tutorial Guruji Official website, we are sharing the answer of ReactJs: Adding an element to the DOM tree without wasting too much if your time.

The question is published on by Tutorial Guruji team.

How can you add an item directly to the main DOM? Using Editor.js, I created a custom block. However, the custom block is created on a seperate DOM tree which makes it inaccessible with Redux.

This is a screenshot of the DOM tree:

Index.js where the main DOM is rendered:

    <Provider store={store}>
      <App />

This is where the custom block was created:

export default class Checklist {
  static get toolbox() {
    return {
      icon: 'SVG Code...'
      title: 'Checklist',

  static get isReadOnlySupported() {
    return true;

  constructor({ data, config, api, readOnly }) {
    this.api = api;
    this.readOnly = readOnly; = {
      events: || [],

    this.CSS = {
      wrapper: 'walkthrough-timeline',

    this.nodes = {
      holder: null,

  render() {
    const rootNode = document.createElement("div");
    rootNode.setAttribute("class", this.CSS.wrapper);
    this.nodes.holder = rootNode;

    const onDataChange = (newData) => { = {


    return this.nodes.holder;

  save() {

I realize that document.createElement("div") will create a new DOM. I’m just not sure how to create the ChecklistTool component inside of the main DOM so it gets access to Redux. Any ideas on how to make this happen? Thank you!


Two things might put you in the right direction.


The way to access the existing DOM tree is through a ref.

  const ref = useRef()
  return <div ref={ref}>Hello</div>

You can apply all your DOM method via ref.current


Render function is called every time, this is not good, because you don’t want to handle the DOM in every render. Instead you have to look for some startup or cleanup location. Use function component as a example.

  useEffect(() => {
    ref.current && ref.current.textContent = "Hello World"
    return () => {
       ref.current.textContent = "Notitle"
  }, [])

The above will set the title once after the component mount and set the title back after unmount.

Based on the above two points, you can give it shot for your own logic.

We are here to answer your question about ReactJs: Adding an element to the DOM tree - If you find the proper solution, please don't forgot to share this with your team members.

Related Posts

Tutorial Guruji