score:1

if you want the exporting module supports using html language for example in formatters, you have to set "allowhtml: true" in exporting object, like below:

exporting: {
    allowhtml: true,
}

there is api reference: http://api.highcharts.com/highcharts/exporting.allowhtml

jsfiddle: https://jsfiddle.net/daniel_s/9g90hdad/

best regards!


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