答案 0 :(得分:1)
这是因为您尚未在render方法中为MetricGraphics组件提供道具,但是您已在不进行任何操作的类的定义之前添加了道具,只需将其删除并粘贴到render方法中,如下所示>
render() {
return (
<div>
<Hello name={this.state.name} />
<p>
Start editing to see some magic happen :)
</p>
<MetricsGraphics
title="Downloads"
description="This graphic shows a time-series of downloads."
data={ [{'date':new Date('2014-11-01'),'value':12}, {'date':new Date('2014-11-02'),'value':18}] }
width={600}
height={250}
x_accessor="date"
y_accessor="value"
/>
</div>
);
}