React点击事件的两种写法小结_React

...
clicked(param,event){
    console.log(param) //hello world
    console.log(event.target.value) //按钮
}

render(){
    return (
        <React.Fragment>
            <button value="按钮" onClick={this.clicked.bind(this,"hello world")}>点击</button>
        </React.Fragment>
    )
}
...

...
constructor(props){
    super(props);
    this.state = {};
    this.checkMenu = this.checkMenu.bind(this);
}

clicked = (param)=>{
    return (event)=>{
        console.log(event.target.value); // 按钮
        console.log(param); // hello
    }
}

render(){
    return (
        <React.Fragment>
            <button value="按钮" onClick={this.clicked('hello')}>点击</button>
        </React.Fragment>
    )
}
...

...
clicked(param,event){
    console.log(param) //hello world
    console.log(event.target.value) //按钮
}

render(){
    return (
        <React.Fragment>
            <button value="按钮" onClick={(event)=>this.clicked("hello world",event)}>点击</button>
        </React.Fragment>
    )
}
...