That looks like you've put it in your fonts directory. Try moving the building.geojson up a level.
Good luck!
hi robert , thanks for help ..
Actually i have check , my building.json file is in the resources folder only not inside the font folder . And when i am trying delete the font folder then i am able to get data from building.json in my js snippet .
but i want to keep the font folder also . its not working when i have place both the files in the resource folder
It looks like you have put the building.json in the Atlas Core module. That is a standard marketplace module so you could loose your file if you update.
I would suggest creating a new module and mark it as a UI Resources module. Move your building.json file to the new module. It may also be worth giving it a more distinct name incase it is clashing with another file.