Lightning Components Developer’s Guide
Summer '26 (API version 67.0)
Spring '26 (API version 66.0)
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Summer '25 (API version 64.0)
Spring '25 (API version 63.0)
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Summer '23 (API version 58.0)
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Summer '22 (API version 55.0)
Spring '22 (API version 54.0)
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Summer '21 (API version 52.0)
Spring '21 (API version 51.0)
Winter '21 (API version 50.0)
Summer '20 (API version 49.0)
Spring '20 (API version 48.0)
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Summer '19 (API version 46.0)
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Summer '18 (API version 43.0)
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Summer '17 (API version 40.0)
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Summer '15 (API version 34.0)
Spring '15 (API version 33.0)
Winter '15 (API version 32.0)
App Overview
Designing App UI
Content Security Policy Overview
Distributing Applications and Components
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App Basics
Components are the building blocks of an app.
This section shows you a typical workflow to put the pieces together to create a new app.
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App Overview
An app is a special top-level component whose markup is in a .app resource. -
Designing App UI
Design your app's UI by including markup in the .app resource, which starts with the <aura:application> tag. -
Content Security Policy Overview
The framework uses Content Security Policy (CSP) to control the source of content that can be loaded on a page.