React各种零碎知识合集

React里的事件

<!-- onChange事件 -->
this.handleChange = this.handleChange.bind(this)
handleChange(event) {
    this.setState({value: event.target.value})
}
<textarea onChange={ this.handleChange } />  

<!-- onSubmit事件 -->
this.handleSubmit = this,handleSubmit(this)
handleSubmit(event) {
    alert('提交' + this.state.value + '成功!')
    event.preventDefault()    
    <!-- 清除默认事件 -->
}
<form onSubmit= { this.handleSubmit }></form>