The Value in the JSON of the Vertical Axis of highchart Data Source Must Be int (Detailed Explanation)

var users = ["0","0","0","0","0","2null

Such vertical axis data is not displayed, the value in the JSON must be of int type.

It must be like this:

var users = [1null1null1null1null1null1null1null

Can't it be automatically converted? Or is my posture wrong, not setting some parameters?

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