Lightning Components Developer Guide

What is the Lightning Component Framework?
Quick Start
Before You Begin
Trailhead: Explore Lightning Components Resources
Create a Component for Lightning Experience and Salesforce1
Creating Components
Using Components
Communicating with Events
Creating Apps
Debugging
Fixing Performance Warnings
Reference
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Trailhead: Explore Lightning Components Resources

Get up to speed with the fundamentals of Lightning components with Trailhead resources.
Whether you’re a new Salesforce developer or a seasoned Visualforce developer, we recommend that you start with the following Trailhead resources.
Lightning Components Basics
Use Lightning components to build modern web apps with reusable UI components. You’ll learn core Lightning components concepts and build a simple expense tracker app that can be run in a standalone app, Salesforce1, or Lightning Experience.
Quick Start: Lightning Components
Create your first component that renders a list of contacts from your org.
Build an Account Geolocation App
Build an app that maps your accounts using Lightning components.
Build a Lightning App with the Lightning Design System
Design a Lightning component that displays an account list.
Build a Restaurant-Locator Lightning Component
Build a Lightning component with Yelp’s Search API that displays a list of businesses near a certain location.