如何在将highcharts系列图下载为图像时将其颜色更改为黑白？答案

【问题标题】：How to change the color of highcharts series graph to black & white during downloading it as an image?如何在将highcharts系列图下载为图像时将其颜色更改为黑白？
【发布时间】：2019-04-07 11:51:54
【问题描述】：

I was trying to download the highcharts.js line graph in the black and white image during downloading in spite of the colors which are randomly generated in the graph. But I am not getting how can I achieve this.

下面是图表的链接。

https://jsfiddle.net/gh/get/library/pure/highcharts/highcharts/tree/master/samples/highcharts/demo/line-basic/

I want the graph to be black and white during downloading only and I want them to stay colorful during the rendering. Right now it is downloading as a colorful image. 

Thanks in advance because I am a novice in the highcharts. I am stuck in this position. Please help me out.

【问题讨论】：

到目前为止你有什么尝试？您只是链接了 Highcharts 演示而不是您的代码。
我不知道如何继续这就是为什么我问这个问题@core972。

标签： javascript reactjs highcharts

【解决方案1】：

使用导出选项将默认颜色更改为黑色：

exporting: {
        chartOptions: {
            colors: ['#000000', '#000000', '#000000', '#000000', '#000000'],
        }
    },

这是demo

【讨论】：

非常感谢，这就是我要找的 :)

【解决方案2】：

您可以通过chartOptions属性更改导出颜色：

exporting: {
    chartOptions: {
        ...
    }
}

现场演示：http://jsfiddle.net/BlackLabel/8typuasx/

API 参考：https://api.highcharts.com/highcharts/exporting.chartOptions

【讨论】：

感谢您的支持:)