What does !(exclamation point) mean before and after in javascript?

Question

I am working with this project and am trying to figure out what the exclamation before and after means.

import ICHING from '!json!constants/iching_deoxy.json';

Answer 1

This is an inline webpack loader indicator where json is the json-loader

It's possible to overwrite any loaders in the configuration by prefixing the entire rule with !

This is not part of the Javascript or Ecmascript specifications