Invalid prop: type check failed for prop "value". Expected Number, got String. about vue-strap HOT 3 OPEN

Auw man, it's that simple? Should have seen this. Thanks a lot!

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@kwindo Your return { activeTab: '' } is returning an empty string. Change it to return { activeTab: 0 } to default to selecting your very first tab as the active tab on tab load. You could also set it to 1 to have it default to the "One" tab, or 2 for the "Two" tab, etc.

The warning you are seeing is a result of Prop Validation in the plugin, which is only there to give you warnings in your dev environment: https://vuejs.org/v2/guide/components.html#Prop-Validation

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I've tried to compile this and I've got some errors.
Why?

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