What is onMouseOutCapture in ReactJS ?

Last Updated : 12 Dec, 2023

The React `onMouseOutCapture` is like a watchman that notices when your mouse pointer leaves an element or its kids. It’s similar to `onMouseOut`, but the cool part is that it pays attention as soon as you start moving the mouse away, while `onMouseOut` waits a bit. Think of it as happening in two different phases of the mouse movement.

Prerequisite:

Approach to implement onMouseOutCapture Event:

Event Handling Function: Begin by defining an event handling function, onMouseOutCaptureHandler, within the App component. This function logs a message, indicating the occurrence of the onMouseOutCapture event.
Component Structure: Utilize the React div element with the className “App” to structure the component. Include an <h1> element displaying a greeting and a <p> element where the onMouseOutCapture event is set to trigger the previously defined event handling function.
Component Export: Conclude the component definition by exporting the App component as the default export. This sets up the application to display a greeting and respond to the onMouseOutCapture event on the specified paragraph element.

Syntax:

<element onMouseOutCapture={function}/>

Steps to Create React Application:

Step 1: Create a react project folder and install locally by npm i create-react-app.

npm create-react-app project

Step 2: After creating your project folder, move to it by using the following command.

cd project

Project Structure:

Project Structure

The updated dependencies in package.json file will look like:

"dependencies": {
    "react": "^18.2.0",
    "react-dom": "^18.2.0",
    "react-scripts": "5.0.1",
    "web-vitals": "^2.1.4",
}

Example: In this example, we are adding a text within the <p> tag i.e. ” Mouse over this line and leave!”. The onMouseOutCapture event will call onMouseOutCaptureHandler, a function that will show a text “onMouseOutCapture Event!” whenever we move the pointer of the mouse out of the element, in the console.

Javascript

function App() {
    const onMouseOutCaptureHandler = () => {
        console.log("onMouseOutCapture Event!");
    };
    return (
        <div className="App">
            <h1> Hey Geek!</h1>
            <p onMouseOutCapture={onMouseOutCaptureHandler}>
                Mouse over this line and leave!
            </p>
        </div>
    );
}
 
export default App;