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Introduction

Creating and enrolling in an Apple Developer account is essential for publishing your iOS app to the App Store and setting up TestFlight builds. This guide walks you through registering an Apple ID (if needed), selecting your enrollment type, verifying organizational details, accepting the license agreement, completing the annual membership purchase, and accessing App Store Connect.

Creating an Apple ID

1. Navigate to https://appleid.apple.com/.

2. Click Create Your Apple ID and follow the prompts to enter your name, email, and security settings.

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Asynchronous JavaScript

1. Thread Of Execution

JavaScript is Synchronous

We are going to start to get into asynchronous JavaScript. Before we do that though, it is important to understand how JavaScript actually works and to understand that at it's core, JavaScript is a synchronous and single-threaded language. It has asynchronous capabilities, which we will be looking at in this section and others, but it is not asynchronous by default.

JavaScript is Single-Threaded

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Performance Optimization for ReactJS Applications

General

Optimizations

• "Start with a problem first, then solve it. dont go looking for problems."

• "Measure first before you optimize for performance. And then measure again."

profiler --> general --> check 'highlight updates when components render' to visually see what components render' (green border around element as long as you have devTools open)