evenstensberg

function pureRenderMixin(Component) {
  Component.prototype.shouldComponentUpdate(nextProps, nextState) {
    return !shallowEqual(this.props, nextProps) ||
           !shallowEqual(this.state, nextState);
  }
  
  return Component;
}

class MyComponent extends React.Component {}

evenstensberg

if (
  process.env.NODE_ENV === 'production' &&
  window.__REACT_DEVTOOLS_GLOBAL_HOOK__ &&
  Object.keys(window.__REACT_DEVTOOLS_GLOBAL_HOOK__._renderers).length
) {
  window.__REACT_DEVTOOLS_GLOBAL_HOOK__._renderers = {}
}

evenstensberg

// Production steps of ECMA-262, Edition 6, 22.1.2.1
// Reference: https://people.mozilla.org/~jorendorff/es6-draft.html#sec-array.from
if (!Array.from) {
  Array.from = (function () {
    var toStr = Object.prototype.toString;
    var isCallable = function (fn) {
      return typeof fn === 'function' || toStr.call(fn) === '[object Function]';
    };
    var toInteger = function (value) {
      var number = Number(value);

evenstensberg

import React from "react";
import { render } from "react-dom";

const ParentComponent = React.createClass({
  getDefaultProps: function() {
    console.log("ParentComponent - getDefaultProps");
  },
  getInitialState: function() {
    console.log("ParentComponent - getInitialState");
    return { text: "" };