Realtime GraphQL UI Updates in React with Apollo. ― Scotch

Realtime GraphQL UI updates in React with Apollo  #ReactJS #GraphQL

  • // ChannelsListWithData = graphql(channelsListQuery, { options: { pollInterval: 5000 a new channel from another client now updates our list of channels after 5 seconds, not the best way of doing it but a step in making the application realtime.
  • store.writeQuery({ query: channelsListQuery, data }); – } – }) – … – As soon as the mutation completes, we read the current result for the channelsListQuery out of the store, append the new channel to it, and tell Apollo Client to write it back to the store.
  • To add WebSocket support to our existing interface, we will construct a GraphQL Subscription client and merge it with our existing network interface to create a new interface that performs normal GraphQL queries over HTTP and subscription queries over WebSockets.
  • … – We edit the following part to disable const ChannelsListWithData = graphql(channelsListQuery, { options: { pollInterval: 5000 }})(ChannelsList); – … – Edit the above to: const ChannelsListWithData = to add a new channel now in our app does not reflect the changes until we refresh the page and that…
  • jsx – … – import { SubscriptionClient, addGraphQLSubscriptions } from networkInterface = createNetworkInterface({ – uri: wsClient = new { – reconnect: true – }); – – // Extend the network interface with the WebSocket – const = addGraphQLSubscriptions( – networkInterface, – wsClient – ); – To enable subscriptions throughout our…

This is the fourth and final part of a 4-part series of articles explaining the implementation of GraphQL on an Express Server and similarly in a React client using Apollo. In this article we look at how to maintain realtime UI updates after implementing different GraphQL updates that result in either creation, update or deletion of data on the server side. For part 1, 2 and 3, refer to the links:
Continue reading “Realtime GraphQL UI Updates in React with Apollo. ― Scotch”

Writing Software Patterns

  • Every author tends to make his own particular pattern form, but certain pattern forms have become more well-known.
  • The idea is that you have a body of patterns with a structure that leads you from pattern to pattern.
  • Once you look at two sets of patterns you realize hardly ever do two patterns authors use the same form.
  • Many people see Christopher Alexander’s A Pattern Language (APL) as an important influence in the patterns world.
  • The desire is reinforced by the chunking that patterns are about – a reader should only have to read that one pattern to understand the pattern.

I’ve spent a lot of my writing energy writing
patterns. From time to time I get asked questions about why I do
that and what makes a good pattern. This is a brief article about
how I look at patterns with my suggestions for people who are
interested in writing patterns themselves.
Continue reading “Writing Software Patterns”

How to handle state in React. — React Ecosystem — Medium

“How to handle state in React.” by @osmel_mora  #ReactJS #Developer #WebDev

  • A React component is like a state machine that represents an user interface.
  • React stores the component’s state in this.state.
  • // Don’t duplicate data form props in state // Antipattern class Component extends React.
  • Even if you are already using Flux, there are cases when you should use the component’s state.
  • Every user action potentially triggers a change in that state machine.

Read the full article, click here.

@atomicjolt: ““How to handle state in React.” by @osmel_mora #ReactJS #Developer #WebDev”

The missing FAQ.

How to handle state in React. — React Ecosystem — Medium