"event listener in react" Code Answer's
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react button onclick
import React, { Component } from 'react';
class App extends Component {
constructor(props) {
super(props);
this.sayHello = this.sayHello.bind(this);
}
sayHello() {
alert('Hello!');
}
return (
<button onClick={this.sayHello}>
Click me!
</button>
);
}
export default App;
Source: upmostly.com
react button onclick
import React from 'react';
function App() {
function sayHello() {
alert('Hello!');
}
return (
<button onClick={sayHello}>
Click me!
</button>
);
}
export default App;
Source: upmostly.com
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);
Source: react-cn.github.io
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;
react event listener
onClick onContextMenu onDoubleClick onDrag onDragEnd onDragEnter onDragExit
onDragLeave onDragOver onDragStart onDrop onMouseDown onMouseEnter onMouseLeave
onMouseMove onMouseOut onMouseOver onMouseUp
Source: reactjs.org
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