Lightning Components Developer Guide

What is the Lightning Component Framework?
Quick Start
Creating Components
Using Components
Communicating with Events
Creating Apps
App Overview
Designing App UI
Creating App Templates
Developing Secure Code
What is LockerService?
JavaScript ES5 Strict Mode Enforcement
DOM Access Containment
Secure Wrappers for Global References
Access to Supported JavaScript API Framework Methods Only
What Does LockerService Affect?
Disabling LockerService for a Component
Don’t Mix Component API Versions
LockerService Disabled for Unsupported Browsers
Content Security Policy Overview
Salesforce Lightning CLI
Styling Apps
Using JavaScript
JavaScript Cookbook
Using Apex
Lightning Data Service (Beta)
Lightning Container (Developer Preview)
Controlling Access
Using Object-Oriented Development
Using the AppCache
Distributing Applications and Components
Debugging
Fixing Performance Warnings
Reference
PDF

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Access to Supported JavaScript API Framework Methods Only

You can access published, supported JavaScript API framework methods only. These methods are published in the reference doc app at https://<myDomain>.lightning.force.com/auradocs/reference.app, where <myDomain> is the name of your custom Salesforce domain. Previously, unsupported methods were accessible, which exposed your code to the risk of breaking when unsupported methods were changed or removed.