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state={ id:1}//以下是render{ return ( this.state.id === 1 ? <div> 渲染条件为1的dom </div> : <div> 渲染条件不为1的dom </div> )}
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//img的src需要require('路径')//backgroundImage需要字符串拼接<img src={require('../accets/i.jpg')} />//注意如果是json返回的cdn地址直接写即可,例如<img src={item.imgUrl} /><div style={{backgroundImage:'url('+require('../accets/1/jpg') +')'}}></div>