Add Reactive Patterns guide#4922
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abdelaziz-mahdy wants to merge 1 commit intokgrgreer:developmentfrom
Open
Add Reactive Patterns guide#4922abdelaziz-mahdy wants to merge 1 commit intokgrgreer:developmentfrom
abdelaziz-mahdy wants to merge 1 commit intokgrgreer:developmentfrom
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Document all FOAM slot/reactive variations with source code references, internal mechanics, and a decision tree: PropertySlot, slot(), dot(), SubSlot chains, expression, dynamic(), ExpressionSlot, map(), follow(), linkFrom(), sub(). Includes detailed analysis of trailing $ behavior and why it creates a broken empty-name SubSlot.
kgrgreer
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Mar 27, 2026
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| **Returns**: `PropertySlot` (cached per instance in `obj.getPrivate_('name$')`) | ||
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| **Use case**: When you need a slot reference to a single, flat property — for linking, following, or passing to views. |
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Should add that person.fname$ is a short-form for person.slot('fname')
kgrgreer
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Mar 27, 2026
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| **How it differs from `expression`**: | ||
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| | Aspect | `expression` | `dynamic()` | |
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The second column should be expressions and slots.
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Summary
$behavior and why it creates broken empty-name SubSlotsMotivation
The existing
dynamic.mdguide covers only expression vs dynamic(). This guide covers all 10+ reactive variations with code traces through Slot.js, FObject.js, and Property.js, making it easier for developers to understand which pattern to use and why.