How to handle eslint no-param-reassign rule in Array.prototype.reduce() functions

Question

I\'ve recently added the eslint rule no-param-reassign.

However, when I use reduce to build out an object (empty object as initialValue), I find myself need

Answer 1

One solution would be to leverage the object spread operator

const newObject = ['a', 'b', 'c'].reduce((result, item, index) => ({
  ...result,
  [item]: index, 
}), {});