state and props
What is the Props
Props is short for properties and they are used to pass data between React components. React’s data flow between components is uni-directional
wt is State
which allows components to create and manage their own datastate and props
What is the Props
Props is short for properties and they are used to pass data between React components. React’s data flow between components is uni-directional
wt is State
which allows components to create and manage their own datastate with react functions
class Example extends React.Component {
constructor(props) {
super(props);
this.state = {
count: 0
};
}
render() {
return (
<div>
<p>You clicked {this.state.count} times</p>
<button onClick={() => this.setState({ count: this.state.count + 1 })}>
Click me
</button>
</div>
);
}
}react lifecycle example
class Test extends React.Component {
constructor() {
console.log('Constructor')
super();
this.state = {
count: 0
};
}
componentDidMount() {
console.log("component did mount");
}
componentDidUpdate() {
console.log("component did update");
}
onClick = () => {
this.setState({ count: this.state.count + 1 });
};
render() {
console.log("render");
return (
<div>
Hello Test
<button onClick={this.onClick}>
{this.state.count}
</button>
</div>
);
}
}
//--for first time
//Constructor
//render
//component did mount
//--for any update
//render
//component did updateCopyright © 2021 Codeinu
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