React lifecycle hooks

Lifecycles if reactjs

class Clock extends React.Component {
  constructor(props) {
    super(props);
    this.state = {date: new Date()};
  }

  componentDidMount() {  }
  componentWillUnmount() {  }
  render() {
    return (
      <div>
        <h1>Hello, world!</h1>
        <h2>It is {this.state.date.toLocaleTimeString()}.</h2>
      </div>
    );
  }
}

Source: reactjs.org

Components react to hooks

import React, { useState } from 'react';
function Example() {
  // Declare a new state variable, which we'll call "count"  const [count, setCount] = useState(0);
  return (
    <div>
      <p>You clicked {count} times</p>
      <button onClick={() => setCount(count + 1)}>
        Click me
      </button>
    </div>
  );
}

-1

Source: reactjs.org

React lifecycle hooks

class Content extends React.Component {
  // ...
  componentWillMount() {
    this.setState({ activities: data });
  }
  // ...
}

-1

Source: newline.co

Similar codes

2 votes244 views1 answer
React setupproxy
Javascript React
0 vote251 views1 answer
11. Which of the following metals catch fire on reaction with air? A. Magnesium B. Manganese C. Potassium D. Calcium
Javascript React
0 vote220 views1 answer
React open url with button
Javascript React
0 vote323 views1 answer
No routes matched location / react router
Javascript React
0 vote258 views1 answer
Storybook react router
Javascript React
0 vote237 views1 answer
React-chartjs-2
Javascript React
-1 vote269 views1 answer
How to run react native app on simulator
Javascript React
0 vote244 views1 answer
Use this in a react js component
Javascript React
0 vote237 views1 answer
Hide component blur react hooks
Javascript React
1 vote236 views1 answer
Tailwind css react craco package.json
Javascript React