From 90bc67ca14d8c428460bf34db12aae66a8f38580 Mon Sep 17 00:00:00 2001
From: Frank Dana <ferdnyc@gmail.com>
Date: Tue, 23 Jan 2024 04:37:44 -0500
Subject: [PATCH] feat(css): alsoAppliesTo data for bg-pos-x/bg-pos-y (#707)
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### Description

Copy the `alsoAppliesTo` data from `background-position` to
`background-position-x` and `background-position-y`, an obvious
derivation from the shorthand property.

### Motivation

Provide more complete/detailed "Formal definition" data for MDN CSS
property reference.

### Additional details

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places providing more context -->

### Related issues and pull requests

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---
 css/properties.json | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/css/properties.json b/css/properties.json
index 5d6c8902..ded412a8 100644
--- a/css/properties.json
+++ b/css/properties.json
@@ -2329,6 +2329,11 @@
     "appliesto": "allElements",
     "computed": "listEachItemConsistingOfAbsoluteLengthPercentageAndOrigin",
     "order": "uniqueOrder",
+    "alsoAppliesTo": [
+      "::first-letter",
+      "::first-line",
+      "::placeholder"
+    ],
     "status": "experimental",
     "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/background-position-x"
   },
@@ -2345,6 +2350,11 @@
     "appliesto": "allElements",
     "computed": "listEachItemConsistingOfAbsoluteLengthPercentageAndOrigin",
     "order": "uniqueOrder",
+    "alsoAppliesTo": [
+      "::first-letter",
+      "::first-line",
+      "::placeholder"
+    ],
     "status": "experimental",
     "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/background-position-y"
   },