Lightning Components Developer's Guide
Summer '26 (API version 67.0)
Spring '26 (API version 66.0)
Winter '26 (API version 65.0)
Summer '25 (API version 64.0)
Spring '25 (API version 63.0)
Winter '25 (API version 62.0)
Summer '24 (API version 61.0)
Spring '24 (API version 60.0)
Winter '24 (API version 59.0)
Summer '23 (API version 58.0)
Spring '23 (API version 57.0)
Winter '23 (API version 56.0)
Summer '22 (API version 55.0)
Spring '22 (API version 54.0)
Winter '22 (API version 53.0)
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)
Winter '20 (API version 47.0)
Summer '19 (API version 46.0)
Spring '19 (API version 45.0)
Winter '19 (API version 44.0)
Summer '18 (API version 43.0)
Spring '18 (API version 42.0)
Winter '18 (API version 41.0)
Summer '17 (API version 40.0)
Spring '17 (API version 39.0)
Winter '17 (API version 38.0)
Summer '16 (API version 37.0)
Spring '16 (API version 36.0)
Winter '16 (API version 35.0)
Summer '15 (API version 34.0)
Spring '15 (API version 33.0)
Winter '15 (API version 32.0)
App Overview
Designing App UI
Creating App Templates
Content Security Policy Overview
Invoking Actions on Component Initialization
Detecting Data Changes
Finding Components by ID
Dynamically Creating Components
Dynamically Adding Event Handlers
Dynamically Showing or Hiding Markup
Adding and Removing Styles
Which Button Was Pressed?
Distributing Applications and Components
Newer Version Available
JavaScript Cookbook
This section includes code snippets and samples that can be used in various JavaScript files.
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Invoking Actions on Component Initialization
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Detecting Data Changes
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Finding Components by ID
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Dynamically Creating Components
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Dynamically Adding Event Handlers
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Dynamically Showing or Hiding Markup
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Adding and Removing Styles
You can add or remove a CSS style on a component or element during runtime. -
Which Button Was Pressed?
To find out which button was pressed in a component containing multiple buttons, use Component.getLocalId().