From d11cd99ac096b5ce1978bbd0f4c3889b85088251 Mon Sep 17 00:00:00 2001
From: Pascal Lim <pascal.lim@theuniprogroup.com>
Date: Sat, 5 Oct 2019 23:38:31 +0400
Subject: [PATCH] Add support for ShadowRoot DOM api feature detect through
 `shadowroot` and `shadowroot-legacy` (#2475)

Co-authored-by: Kevin Coyle <kevin.coyle@theuniprogroup.com>
---
 feature-detects/dom/shadowroot.js       | 20 ++++++++++++++++++++
 feature-detects/dom/shadowrootlegacy.js | 20 ++++++++++++++++++++
 lib/config-all.json                     |  2 ++
 3 files changed, 42 insertions(+)
 create mode 100644 feature-detects/dom/shadowroot.js
 create mode 100644 feature-detects/dom/shadowrootlegacy.js

diff --git a/feature-detects/dom/shadowroot.js b/feature-detects/dom/shadowroot.js
new file mode 100644
index 0000000000..ca2354b020
--- /dev/null
+++ b/feature-detects/dom/shadowroot.js
@@ -0,0 +1,20 @@
+/*!
+{
+  "name": "Shadow DOM API",
+  "property": "shadowroot",
+  "caniuse": "shadowdomv1",
+  "notes": [{
+    "name": "MDN Docs",
+    "href": "https://developer.mozilla.org/en-US/docs/Web/API/ShadowRoot"
+  }],
+  "authors": ["Kevin Coyle (@kevin-coyle-unipro)", "Pascal Lim (@pascalim)"],
+  "tags": ["dom"]
+}
+!*/
+
+/* DOC
+Detects support for the Shadow DOM API.
+*/
+define(['Modernizr', 'createElement'], function (Modernizr, createElement) {
+  Modernizr.addTest('shadowroot', 'attachShadow' in createElement('div'));
+});
diff --git a/feature-detects/dom/shadowrootlegacy.js b/feature-detects/dom/shadowrootlegacy.js
new file mode 100644
index 0000000000..9ad65b5773
--- /dev/null
+++ b/feature-detects/dom/shadowrootlegacy.js
@@ -0,0 +1,20 @@
+/*!
+{
+  "name": "Shadow DOM API (Legacy)",
+  "property": "shadowrootlegacy",
+  "caniuse": "shadowdom",
+  "notes": [{
+    "name": "MDN Docs",
+    "href": "https://developer.mozilla.org/en-US/docs/Web/API/Element/createShadowRoot"
+  }],
+  "authors": ["Kevin Coyle (@kevin-coyle-unipro)", "Pascal Lim (@pascalim)"],
+  "tags": ["dom"]
+}
+!*/
+
+/* DOC
+Detects support for the Shadow DOM API. (Legacy)
+*/
+define(['Modernizr', 'createElement'], function (Modernizr, createElement) {
+  Modernizr.addTest('shadowrootlegacy', 'createShadowRoot' in createElement('div'));
+});
diff --git a/lib/config-all.json b/lib/config-all.json
index 97c5e4f2ab..5b44512eb9 100644
--- a/lib/config-all.json
+++ b/lib/config-all.json
@@ -142,6 +142,8 @@
     "dom/microdata",
     "dom/mutationObserver",
     "dom/passiveeventlisteners",
+    "dom/shadowroot",
+    "dom/shadowrootlegacy",
     "elem/bdi",
     "elem/datalist",
     "elem/details",