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* knowledge(appsource): add AL validation guidance * Address Marketplace review feedback * Address remaining Marketplace review feedback * Align AppSource review applicability outcome
26 lines
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1.3 KiB
Markdown
26 lines
No EOL
1.3 KiB
Markdown
---
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bc-version: [all]
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domain: appsource
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keywords: [pageextension, actions, addfirst, addlast, addbefore, addafter]
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technologies: [al]
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countries: [w1]
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application-area: [all]
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---
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# Place page extension actions with addfirst or addlast
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## Description
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Place new page-extension actions at the beginning or end of an existing action group with `addfirst` or `addlast`. Anchoring a new action relative to a specific base-app action with `addbefore` or `addafter` couples the extension to an implementation detail that can move or disappear between Business Central releases.
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## Best Practice
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Choose the semantic action area or group and append or prepend the extension's actions. This keeps placement deterministic without depending on the continued existence of one neighboring action.
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See sample: [`place-page-extension-actions-with-addfirst-or-addlast.good.al`](place-page-extension-actions-with-addfirst-or-addlast.good.al).
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## Anti Pattern
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Using `addbefore` or `addafter` to place newly added actions next to a specific action from another app. The syntax is valid AL, but the placement anchor is brittle for a Marketplace extension.
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See sample: [`place-page-extension-actions-with-addfirst-or-addlast.bad.al`](place-page-extension-actions-with-addfirst-or-addlast.bad.al). |