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How to Add šŸ¦„LazyLoading to the reactšŸ”” using React Loadable

saigowthamr profile image Sai gowtham Updated on 惻2 min read

React Loadable makes lazy loading very easy so that you will need not to worry about downloading a large number of bytes. React Loadable splits your code into chunks so that you only serve required bytes.

First clone my React-Router Boilerplate

git clone git@github.com:saigowthamr/React-router-v4-boilerplate.git reactlazy

cd reactlazy

npm  i // to install dependencies

npm start // to start dev server

I have made a clear separation of header and router config files so that it is easy to read.

App folder structure should be like above image.

Now let's install ReactLoadable package

npm i --s react-loadable

In our Boilerplate, I have added two routes.

But there is no content in that two routes so that I'm adding now some
dummy content in the app.js file.

Without Lazy Loading there is the single bundle.js file.

Let's add Lazy loading to our Home route.

For these, I created a lazy.js file in router folder

Now in the lazy.js file, we need to import the react-loadable package and Loading Component.

ReactLoadable function takes options which are loader property and loading

loader: we need to tell the which component you need to load lazily.

loading: Meantime load this loading component So that user does not see the white screen for a long time.

Now lets update router.js.

Let's see what is happening now when we a load home route. For these, I enabled network throttling.

lazy loading

Have you seen we are now loading in chunks instead of single bundle.js file and meantime we are showing loading component.

CodeRepostiory

Posted on May 8 '18 by:

saigowthamr profile

Sai gowtham

@saigowthamr

JavaScript developer, Blogger & Serverless

Discussion

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Ideally, we want this on create-react-app!

 

when i run build my project i can see the splitted chunk files but while loading its not loading the splitted chunk