Is there an elegant way to tell eslint to ensure that we're not using any ES6 syntax / functions?

Question

Is there an elegant way to tell ESLint to ensure that we're not using any ES6 / EMCAScript 2015 syntax / functions?

I've found the following answer somewhat helpful but it seems that it doesn't take care of everything (eg I don't see how to catch the usage of Object.assign()): How to disable usage of certain ES2015 features with ESLint 2?

Answer 1

eslint-plugin-es5 is the package dedicated to your use case. For example the rule es5/no-es6-static-methods forbids the usage of Object.assign .