Uncaught TypeError: Class extends value undefined is not a constructor or null

Question

I have a problem with react component,then,Uncaught TypeError: Class extends value undefined is not a constructor or null.I try to delet the 'extends React.Component',but It`s fale..thanks for your help.

import React from 'react';
import ReactDOM from 'react-dom/client';

class Boss extends React.Component() {
    handlClick() {
        return alert('我是主页');
    }

    render() {
        return (
            <div class="goto">
            </div>
        );
    }
    
}

const root = ReactDOM.createRoot(document.getElementById('root'));
root.render(<Boss />);```

Ahmed Sbai · Accepted Answer · 2023-02-05 02:54:47Z

0

it is React.Component not React.Component()

class Boss extends React.Component{
//...
}

answered Feb 5, 2023 at 2:54

Ahmed Sbai

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