A complete style URL, for example
mapbox://styles/mapbox/streets-v11, is comprised of three components:
mapbox://styles: points to the Mapbox Styles API
/mapbox: your Mapbox username
/streets-v11: your style's unique ID
For each custom style you create in Mapbox Studio, there is a draft and a production style URL available. If you are using the draft version of your style,
/draft will also be appended to the end of the style URL.
You can find the style URL on your Styles page in Mapbox Studio. Click on the menu next to a style to reveal its style URL. Click the icon to copy the style URL.