use Promise.resolve in mapSequence, to ensure each item is thenable - f…

…ixes #1532
rollup · Aug 16, 2017 · 8ec3e0d · 8ec3e0d
1 parent aaca8b5
commit 8ec3e0d
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Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/package-lock.json b/package-lock.json
diff --git a/src/utils/promise.js b/src/utils/promise.js
@@ -3,7 +3,7 @@ export function mapSequence ( array, fn ) {
 	let promise = Promise.resolve();
 
 	function next ( member, i ) {
-		return fn( member ).then( value => results[i] = value );
+		return Promise.resolve( fn( member ) ).then( value => results[i] = value );
 	}
 
 	for ( let i = 0; i < array.length; i += 1 ) {