Add Mapbox Style validation in expert mode #557
Description
Currently, it is possible to save an invalid mapbox style, for example with an invalid value for the color ("#fffff" instead of "#ffffff" for example.)
Even though mapbox shows this in the browser console in Visu-Front, it might be hard to debug especially for non-dev users.
I made a small POC using mapbox-gl-style-spec, it validates a style, and if the style is provided as a multiline string, it says on which lines the errors are.
https://codesandbox.io/s/cranky-shadow-7jd654?file=/src/index.mjs
Including this in the export mode editor would be a great UX improvement and avoid lots of problems in the future.