react click outside

import React, { useRef, useEffect } from "react"; /** * Hook that alerts clicks outside of the passed ref */ function useOutsideAlerter(ref) { useEffect(() => { /** * Alert if clicked on outside of element */ function handleClickOutside(event) { if (ref.current && !ref.current.contains(event.target)) { alert("You clicked outside of me!"); } } // Bind the event listener document.addEventListener("mousedown", handleClickOutside); return () => { // Unbind the event listener on clean up document.removeEventListener("mousedown", handleClickOutside); }; }, [ref]); } /** * Component that alerts if you click outside of it */ export default function OutsideAlerter(props) { const wrapperRef = useRef(null); useOutsideAlerter(wrapperRef); return <div ref={wrapperRef}>{props.children}</div>; }

react click outside class implementation

import React, { Component } from 'react';
import PropTypes from 'prop-types';

/**
 * Component that alerts if you click outside of it
 */
export default class OutsideAlerter extends Component {
    constructor(props) {
        super(props);

        this.wrapperRef = React.createRef();
        this.setWrapperRef = this.setWrapperRef.bind(this);
        this.handleClickOutside = this.handleClickOutside.bind(this);
    }

    componentDidMount() {
        document.addEventListener('mousedown', this.handleClickOutside);
    }

    componentWillUnmount() {
        document.removeEventListener('mousedown', this.handleClickOutside);
    }

    /**
     * Alert if clicked on outside of element
     */
    handleClickOutside(event) {
        if (this.wrapperRef && !this.wrapperRef.current.contains(event.target)) {
            alert('You clicked outside of me!');
        }
    }

    render() {
        return <div ref={this.wrapperRef}>{this.props.children}</div>;
    }
}

OutsideAlerter.propTypes = {
    children: PropTypes.element.isRequired,
};

Posted by: Guest on May-13-2021

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