My first web-application on React.js

\ **Category:** web dev\ **Created:** [December 27, 2021, 4:11am UTC](https://forum.kirupa.com/t/where-is-my-mistake-who-could-help-me-find-it/650214 "2021-12-27T04:11:17Z")\ **Posts on this page:** 5\ **Page:** 1

**Author:** ![Programmer\_Uz](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/programmer_uz/32/16357_2.png) [@Programmer\_Uz](https://forum.kirupa.com/u/Programmer_Uz)\ **Post date:** [December 27, 2021, 4:11am UTC](https://forum.kirupa.com/t/where-is-my-mistake-who-could-help-me-find-it/650214/1 "2021-12-27T04:11:17Z")

```auto My first web-application on React.js

``` ---

**Author:** ![kirupa](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/kirupa/32/11616_2.png) [@kirupa](https://forum.kirupa.com/u/kirupa)\ **Post date:** [December 28, 2021, 2:36am UTC](https://forum.kirupa.com/t/where-is-my-mistake-who-could-help-me-find-it/650214/2 "2021-12-28T02:36:18Z")

What is the error you are seeing? Does the Console show anything? ---

**Author:** ![Programmer\_Uz](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/programmer_uz/32/16357_2.png) [@Programmer\_Uz](https://forum.kirupa.com/u/Programmer_Uz)\ **Post date:** [December 28, 2021, 6:32pm UTC](https://forum.kirupa.com/t/where-is-my-mistake-who-could-help-me-find-it/650214/3 "2021-12-28T18:32:14Z")

Error babel.js @Anonymous1 ---

**Author:** ![kirupa](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/kirupa/32/11616_2.png) [@kirupa](https://forum.kirupa.com/u/kirupa)\ **Post date:** [December 29, 2021, 6:03pm UTC](https://forum.kirupa.com/t/where-is-my-mistake-who-could-help-me-find-it/650214/4 "2021-12-29T18:03:54Z")

The error I saw in the Console when I ran your code is this: ![image](https://canada1.discourse-cdn.com/flex011/uploads/kirupa/original/3X/1/0/10b2c132fb2eef3dfb3d80860b4a86b94946e03f.png) This narrowed down the problem, for what you had originally is the following: ```auto ReactDOM.render( ,

Привет, мир!

, document.querySelector('#container') ) ``` You have a comma after the ``, which isn’t valid. You can only render a single parent element that can have multiple children inside it. The `ReactDOM.render` method takes two arguments - one for the blob of JSX you want to render and the other for the DOM element on the page you want to render the output to. One way to fix your code would be to remove the comma and wrap all of your current content into another div element as follows: ```auto ReactDOM.render(

Привет, мир!

, document.querySelector('#container') ) ``` ---

**Author:** ![Programmer\_Uz](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/programmer_uz/32/16357_2.png) [@Programmer\_Uz](https://forum.kirupa.com/u/Programmer_Uz)\ **Post date:** [January 7, 2022, 10:07am UTC](https://forum.kirupa.com/t/where-is-my-mistake-who-could-help-me-find-it/650214/5 "2022-01-07T10:07:05Z")

Thank you very much!!