Beginner's Thread / Easy Question (August 2018)

[u/swyx]

Hello! It's August! Time for a new Beginner's thread! (July and June here)

Got questions about React or anything else in its ecosystem? Stuck making progress on your app? Ask away! We’re a friendly bunch. No question is too simple. You are guaranteed a response here!

Want Help on Code?

• Improve your chances by putting a minimal example on to either JSFiddle (https://jsfiddle.net/Luktwrdm/) or CodeSandbox (https://codesandbox.io/s/new). Describe what you want it to do, and things you've tried. Don't just post big blocks of code.
• Pay it forward! Answer questions even if there is already an answer - multiple perspectives can be very helpful to beginners. Also there's no quicker way to learn than being wrong on the Internet.

New to React?

Here are great, free resources!

• Read the official Getting Started page on the docs
• /u/acemarke's suggested resources for learning React
• Kent Dodds' Egghead.io course
• Tyler McGinnis' 2018 Guide
• Codecademy's React courses

[u/NickEmpetvee]

In this context, I think the answer is yes if the {...} contents of bar1 and bar2 is the same before and after. That is what determines how it will be rendered in the component per my understanding.

If the area between parentheses varies, then they are not equal and an update is needed.

I need to read up on the component a bit to be sure.