How to move Ion range's controller with button?

Hello guys,

I have an ion-range on my html.
I want to move its thumb slider with a button.

Here’s an example of JavaScript which is doing what I’m trying to accomplish:

I can clearly see how this work on javascript but I don’t know how to convert this into angular 4 ts.
Is there anyone who can give me a nice advice?


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Having the same issue, not sure if this is possible