This is a very simple JS script to render tiled maps ( http://mapeditor.org ) saved as JSON on a canvas element. Needless to say, it is very rudimentary, and not full featured, but by all means add features!
You must have Node, npm, webpack, babel, json-loader(very important), etc, etc, etc ... The works ... enough to run ES6. To start the dev version npm run start
Once on the browser, user arrow keys to move the map.
Happy coding!