Is there a possibility to show values permantly on the graph over config? we can do it with js, but we want to configure it with json.
Is there a possibility to show these values by a rule that is configured in json?
As shown in the fiddle I had provided, there is an attribute 'valueBox' which helps to show the data on the graph permanently (not as tooltip) . Is there an attribute in Highcharts which does the same?
No, unfortunately it is not possible. As you probably know JSON is a data description language and function is not supported data type. In such case, where you want to keep your whole chart config as a JSON, the only viable option to show data labels conditionally is dataLabels.filter, which uses 'pseudo code' to control which data labels should be displayed. Usage and effects should be fairly similar to the example that you shared.
Let me know if you have any further questions!
Best regards!