July 2018
Beginner
236 pages
5h 34m
English
Content preview from MobX Quick Start Guide
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Tracing a reaction
While spy() gives you a lens to observe all changes happening in MobX, trace() is a utility that is specifically focused on computed properties, reactions, and component renders. You can find out why a computed property, reaction, or a component render is being invoked by simply placing a trace() statement inside it:
trace(thing?, property?, enterDebugger?)
It has three optional arguments:
- thing: An observable
- property: An observable property
- enterDebugger: A Boolean flag indicating whether you want to step into the debugger automatically
It is quite common to invoke a trace with: trace(true), which will pause inside the debugger upon invocation. For the book search example (from Chapter 3, A React App with MobX), we ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.