mapbox-gl-directions | Directions plugin for mapbox-gl-js using Mapbox Directions | Map library

I'm using Mapbox to integrate in a javascript/php project. So far so good. Works great. Looking around their api I was wondering whether it was possible to have a mix between mapbox-gl-directions and mapbox-directions api. They don't seem to be the same thing.I really like the example from mapbox-gl-directions which gives the user options to select between driving, cycling and walking. But I already have coordinates for the origin point and coordinates for the destination point. I don't necessarily need the user to input those coordinates but I would also like to leave the user the option to enter alternative coordinates if he wanted to. How can I add starting and destination points to the mapbox-gl-directions just like the mapbox-directions-api? I've looked everywhere in their docs.

mapbox-gl-directions :

I'm using mapbox-gl-directions, version: 4.0.2. I want to exclude tolls, ferries or motorways. Here is a documentation: API and it says you can pass exclude parameter:
But while passing it like this, it doesn't work:

I am using Mapbox gl in Ionic - v4, As showing in Mapbox docs i have added Display driving directions. With direction control it showing turn instructions and i want hide turn instruction.

I have:

I could not find any answer to my issue, so I hope someone has an easy explanation ;)

I'm trying to create my own geocoding database, so that I can replace the default API of MapBox (https://api.mapbox.com/geocoding/v5/mapbox.places/). I want to plot transit data - and I have my own GTFS feeds/database for that. Currently I have a directory on my wordpress site containing numerous .json files for searching geocode information (I'm thinking in a similar style as the Mapbox api). However, the javascript is perfectly able to search through the api mapbox data, but not my directory in wordpress. Anyone knows what I need to do?

I don't have much knowledge of Javascript and I haven't been able to figure out a solution for my problem. I'm making use of the Mapbox Direction API, which currently supports traffic/driving/walking/cycling. I am however interest in an other option; transit, for which I have my own GTSF datasets up and running in a queryable database. Hence; I want to use the code of the Mapbox Direction API and couple it to my own database (in the end, some small steps first..). - Example: https://www.mapbox.com/mapbox-gl-js/example/mapbox-gl-directions/ - Code: https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-directions/v3.1.1/mapbox-gl-directions.js

Does anyone know how (easily) I can edit the Javascript in such a way that; the Start and Destination can ónly be selected based from a pre-defined list.

PS: If anyone has any other idea of creating a javascript layover with a simple list-based Point A to Point B which returns a text-based popup/layover, on mapbox... let me know.

I am going to use my local osrm server in order to do routing in a map based on mapbox GL. In mapbox-gl-directions.js there is a server part:

I have an issue with mapbox direction plugin, on a rails app. When I load the page where the map is, I have this error :