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React - class component force re-render
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In this article, we would like to show you how to force re-render in a class component in React.
Any change of state causes component rendering, so using e.g. counter in the state, we are able to force re-rendering always when setState() method changes (increments) the value of our counter.
Runnable example:
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// Note: Uncomment import lines during working with JSX Compiler.2
// import React from 'react';3
// import ReactDOM from 'react-dom';4
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class App extends React.Component {6
constructor(props) {7
super(props);8
this.state = { counter: 0 };9
}10
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render() {12
console.log('App component rednering...');13
return (14
<div>15
<button onClick={() => this.setState({ counter: this.state.counter + 1 })}>16
force re-rendering17
</button>18
</div>19
);20
}21
}22
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const root = document.querySelector('#root');24
ReactDOM.render(<App />, root);Note:
Go to this article to see functional component example.
