react onclick to make another button
import React from 'react';
const App = () => {
const message = () => {
console.log("Hello World!")
}
return (
<button onClick={message}> Press me to print a message! </button>
);
}react onclick to make another button
import React from 'react';
const App = () => {
const message = () => {
console.log("Hello World!")
}
return (
<button onClick={message}> Press me to print a message! </button>
);
}event listener in react
var Box = React.createClass({
getInitialState: function() {
return {windowWidth: window.innerWidth};
},
handleResize: function(e) {
this.setState({windowWidth: window.innerWidth});
},
componentDidMount: function() {
window.addEventListener('resize', this.handleResize);
},
componentWillUnmount: function() {
window.removeEventListener('resize', this.handleResize);
},
render: function() {
return <div>Current window width: {this.state.windowWidth}</div>;
}
});
ReactDOM.render(<Box />, mountNode);react event listener
// it a component
import React from 'react';
class App extends React.Component {
//call function (ECMAScript 5) from tag input:text
handleChange = e => {
//
console.log(`${e.target.value}`)
}
render() {
return (
<div className="App">
<input type="text" name="input" id="" placeholder="" onChange={this.handleChange}/>
</div>
);
}
}
export default App;how to use an event listener in a react js component
class Button extends React.Component {
scream() {
alert('AAAAAAAAHHH!!!!!');
}
render() {
return <button onClick={this.scream}>AAAAAH!</button>;
}
}
ReactDOM.render(<Button />, document.getElementById('app'));Copyright © 2021 Codeinu
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