Autobind

autobind.js

const autobind = (instance) => {
  for (var prop in instance) {
    if (instance.hasOwnProperty(property) && typeof instance[property] === 'function') {
      instance[property] = instance[property].bind(instance)
    }
  } 
}

component.js

const React = require('react')
const { Component } = React
const autobind = require('./autobind')

class A extends Component {
  constructor() {
    super()
    autobind(this)
  } 
}