Is it OK to use React.render() multiple times in the DOM?

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React is a popular JavaScript library used for building user interfaces. One common question that arises when working with React is whether it is okay to use React.render() multiple times in the DOM. In this blog post, we will explore the answer to this question and provide multiple solutions.

Understanding React.render()

Before we dive into the main question, let’s briefly understand what React.render() does. This method is used to render a React element into the DOM. It takes two parameters: the React element to be rendered and the DOM element where it should be inserted.

Solution 1: Using React.render() Multiple Times

The short answer to the question is yes, it is okay to use React.render() multiple times in the DOM. React is designed to handle multiple render calls efficiently. Each call to React.render() will update the specific DOM element with the new React element.

Here’s an example of using React.render() multiple times:

    // HTML
    

    


    // JavaScript
    const element1 = 
Hello, World!
;
    const element2 = This is a paragraph.
;

    React.render(element1, document.getElementById('root1'));
    React.render(element2, document.getElementById('root2'));
  

In this example, we have two separate DOM elements with IDs root1 and root2. We render different React elements into each of these elements using separate React.render() calls.

Solution 2: Using React Components

Another approach is to create React components and render them independently. This can provide better organization and reusability in your code.

Here’s an example:

    // HTML
    


    // JavaScript
    const Component1 = () => {
      return 
Hello, World!
;
    };

    const Component2 = () => {
      return This is a paragraph.
;
    };

    React.render(, document.getElementById('root'));
    React.render(, document.getElementById('root'));
  

In this example, we define two React components, Component1 and Component2. We then render each component into the same DOM element with the ID root.

Conclusion

In conclusion, it is perfectly fine to use React.render() multiple times in the DOM. React efficiently handles these render calls and updates the specific DOM elements accordingly. Additionally, using React components can provide better code organization and reusability.

Remember to consider the specific requirements of your application and choose the approach that best suits your needs.