I'm a newbie in React and I was wondering what is the purpose of registerServiceWorker() in the following code?  import React from 'react'; import ReactDOM from 'react-dom'; import App from './App'; import registerServiceW...
i am having troubles setting up webpack build configuration. i have two webpack config files, one for development and one for production.  everything works fine in dev environment, but when building for production, i get this error:  ReferenceError:...
I've inherited a react/node/prismic application where we need to update the prismic-reactjs package, which resulted in needing to update a few others- in total, we changed:  prismic-reactjs: 0.2.0 ? 1.1.0  react: 15.6.1 ? 16.0.0  webpack: 3.12.0...
I've inherited a react/node/prismic application where we need to update the prismic-reactjs package, which resulted in needing to update a few others- in total, we changed:  prismic-reactjs: 0.2.0 ? 1.1.0  react: 15.6.1 ? 16.0.0  webpack: 3.12.0...
I'm on a situation where I want to make some dom-node size calculations (top, bottom and size properties of the rendered DOM node)  What I'm doing right now, on the componentDidUpdate method is to call findDOMNode on this:   componentDidUpdat...
I am using React with Webpack and Babel. I am getting a runtime error:     Uncaught ReferenceError: ReactDom is not defined   My react version is:  "devDependencies": {    "phantomjs-polyfill": "0.0.2",    "react-addons-te...
Hello i am learning React js and i have came across a problem.When i try to change back to the main page using react router i get the following error:     Uncaught TypeError: Cannot read property 'push' of undefined   Here is my code, as you...
For my app, I need to render some children, and then measure the resulting div. In pseudo code, it would look something like this:  function getDims(child) {     var testEl = document.getElementById('test-el');     ReactDOM.render(child, test...
This has got to be one of the strangest issues with webpack i have ever come across...    Check out this bundle breakdown:  react 116.01KB - fair enough  react-dom 533.24KB - seriously WTF  I thought it may be a corruption in my dependencies but nuki...
I recently upgraded my project from React v15.2.1 to 16.4.1 and my Sidebar component is throwing the following error:  Error: Unable to find node on an unmounted component. bundle.js line 1326 > eval:42:15 invariant webpack:///./node_modules/fbjs/...

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