What is OnRender

What is OnRender in React.Js and React Native?

OnRender is a lifecycle method in React.Js and React Native that is called when a component is rendered on the screen. It is a crucial part of the rendering process, as it allows developers to perform actions such as updating the component’s state, fetching data from an API, or manipulating the DOM.

How does OnRender work?

When a component is rendered in React.Js or React Native, the OnRender method is called automatically by the framework. Developers can define what actions should be taken during the rendering process by implementing the OnRender method in their component classes.

Why is OnRender important?

OnRender is important because it allows developers to control what happens during the rendering process of a component. This can be useful for updating the component’s state, fetching data from an API, or performing any other actions that are necessary for the component to function correctly.

Examples of using OnRender

One common use case for OnRender is to fetch data from an API and update the component’s state with the retrieved data. This can be done by making an asynchronous call to the API inside the OnRender method and updating the component’s state once the data has been received.

Best practices for using OnRender

When using OnRender in React.Js or React Native, it is important to avoid making any synchronous calls or performing any heavy computations inside the method. This can lead to performance issues and slow down the rendering process of the component.

Conclusion

In conclusion, OnRender is a powerful lifecycle method in React.Js and React Native that allows developers to control what happens during the rendering process of a component. By implementing the OnRender method in their component classes, developers can perform actions such as updating the component’s state, fetching data from an API, or manipulating the DOM.