This is a polyfill for Buffer#indexOf introduced in NodeJS 4.0.
Microsoft sucks
The lodash method _.indexOf exported as a module.
_.indexOf
Return the first index at which a given element can be found.
Lightweight debugging utility for Node.js and the browser
Lodash modular utilities.
A querystring parser that supports nesting and arrays, with a depth limit
Higher-order functions and common patterns for asynchronous code
React is a JavaScript library for building user interfaces.
Babel compiler core.