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Toggle spike lines on by default?

I’ve been asked if I can have the ‘toggle spike lines’ modebar option set on by default. Is this possible? I don’t see it in the https://plot.ly/javascript/configuration-options/, so I’m guessing not, but it’d be a great addition.
I know there are the options in the x and y axis to ‘showspikes’, but then the toggle spike lines button doesn’t turn them off. Any advice appreciated.

Here’s how: https://codepen.io/etpinard/pen/yLyrWyE

Thanks @etienne, sorry for not replying sooner.
I’m guessing there’s not a way to completely disable the spike lines when the toggle button is pressed?