From fed1fb83d2e5c5e22b618e3ee92d62a66fb4b496 Mon Sep 17 00:00:00 2001
From: sarayourfriend <sarayourfriend@fastmail.com>
Date: Tue, 9 Mar 2021 14:03:57 -0800
Subject: [PATCH] Dom: Add type-checking to data-transfer (#29682)

---
 packages/dom/README.md            | 2 +-
 packages/dom/src/data-transfer.js | 4 ++--
 packages/dom/tsconfig.json        | 8 ++++++++
 tsconfig.json                     | 1 +
 4 files changed, 12 insertions(+), 3 deletions(-)
 create mode 100644 packages/dom/tsconfig.json

diff --git a/packages/dom/README.md b/packages/dom/README.md
index 7baf10c94d8358..5936c1e659cc42 100644
--- a/packages/dom/README.md
+++ b/packages/dom/README.md
@@ -84,7 +84,7 @@ _Parameters_
 
 _Returns_
 
--   `Object[]`: An array containing all files.
+-   `File[]`: An array containing all files.
 
 <a name="getOffsetParent" href="#getOffsetParent">#</a> **getOffsetParent**
 
diff --git a/packages/dom/src/data-transfer.js b/packages/dom/src/data-transfer.js
index 6052326c2c2213..ba756a777c9e65 100644
--- a/packages/dom/src/data-transfer.js
+++ b/packages/dom/src/data-transfer.js
@@ -3,10 +3,10 @@
  *
  * @param {DataTransfer} dataTransfer DataTransfer object to inspect.
  *
- * @return {Object[]} An array containing all files.
+ * @return {File[]} An array containing all files.
  */
 export function getFilesFromDataTransfer( dataTransfer ) {
-	const files = [ ...dataTransfer.files ];
+	const files = Array.from( dataTransfer.files );
 
 	Array.from( dataTransfer.items ).forEach( ( item ) => {
 		const file = item.getAsFile();
diff --git a/packages/dom/tsconfig.json b/packages/dom/tsconfig.json
new file mode 100644
index 00000000000000..8821a076a20e5b
--- /dev/null
+++ b/packages/dom/tsconfig.json
@@ -0,0 +1,8 @@
+{
+	"extends": "../../tsconfig.base.json",
+	"compilerOptions": {
+		"rootDir": "src",
+		"declarationDir": "build-types"
+	},
+	"include": [ "src/data-transfer.js" ]
+}
\ No newline at end of file
diff --git a/tsconfig.json b/tsconfig.json
index 06ef384950a431..09359ae24102a2 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -7,6 +7,7 @@
 		{ "path": "packages/block-editor" },
 		{ "path": "packages/components" },
 		{ "path": "packages/deprecated" },
+		{ "path": "packages/dom" },
 		{ "path": "packages/element" },
 		{ "path": "packages/dom-ready" },
 		{ "path": "packages/escape-html" },