-
Notifications
You must be signed in to change notification settings - Fork 0
/
counter.html
50 lines (45 loc) · 1.27 KB
/
counter.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<script crossorigin src="https://unpkg.com/react@18/umd/react.development.js"></script>
<script crossorigin src="https://unpkg.com/react-dom@18/umd/react-dom.development.js"></script>
<script src="https://unpkg.com/babel-standalone@6/babel.min.js"></script>
<title>Class Component</title>
</head>
<body>
<div id="root"></div>
</body>
<script type="text/babel">
class Counter extends React.Component {
constructor(){
super();
this.state={
count:0
}
}
increment=()=>{
this.setState({
count:this.state.count+1
})
}
decrement=()=>{
this.setState({
count:this.state.count-1
})
}
render() {
return (
<React.Fragment>
<button onClick={this.increment}>+</button>
<h1>{this.state.count}</h1>
<button onClick={this.decrement}>-</button>
</React.Fragment>
)
}
}
ReactDOM.render(<Counter/>,document.getElementById("root"));
</script>
</html>