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                說明:在react中的for循環要使用return,并且key的格式為key={index}, vue中格式為key="index" ~~~ <div> {this.state.list.map((value,index)=>{ return( <div onClick={()=>{this.handleDelete(index)}} key={index}> {value} </div> ) })} </div> handleDelete=(index)=>{ console.log(index); } ~~~ 條件渲染:使用if-else根據不同條件return不同的div
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