React.createElement - Javascript

React.createElement is a function provided by the React library that creates a React element. This element can be used to describe what we want to render on the web page.

How to use React.createElement?

The syntax of React.createElement is as follows:

React.createElement(type, [props], [...children])

• type: This can be a string or a reference to a component function. It is required.
• props: It is an object that contains the properties that you want to pass to the component. Here, you can provide properties like className, id, onClick, etc. It is optional.
• ...children: This is the child element of the element that you are creating. It can be another React element, or it can be a string. It is optional.

Example of using React.createElement

Here's an example of how to use React.createElement to create a simple <div> element with some text in it:

const element = React.createElement('div', null, 'Hello World!');

Here, the first argument is 'div', which is the type of the element that we want to create. The second argument is null, which we are passing as props for the created element. The last argument is a simple string, which serves as the child element.

We can then render this element onto the page. Here is an example using ReactDOM:

ReactDOM.render(
  element,
  document.getElementById('root')
);

This will render the created element into the DOM at the element with the id of root.

Conclusion

React.createElement is a fundamental function in the React library that allows us to create React elements. By using this function, we can describe what we want to render on the web page and create complex user interfaces with ease.