use idiomatic JS

cellog · cellog · commit 93153b890da5 · 2019-08-29T15:15:23.000-04:00
diff --git a/src/combineReducers.ts b/src/combineReducers.ts
@@ -40,9 +40,13 @@ function getUnexpectedStateShapeWarningMessage(
   }
 
   if (!isPlainObject(inputState)) {
+    const match = Object.prototype.toString
+      .call(inputState)
+      .match(/\s([a-z|A-Z]+)/)
+    const matchType = match ? match[1] : ''
     return (
       `The ${argumentName} has unexpected type of "` +
-      ({} as any).toString.call(inputState).match(/\s([a-z|A-Z]+)/)[1] +
+      matchType +
       `". Expected argument to be an object with the following ` +
       `keys: "${reducerKeys.join('", "')}"`
     )

Original file line number	Diff line number	Diff line change
`@@ -40,9 +40,13 @@ function getUnexpectedStateShapeWarningMessage(`
`40`	`40`	`}`
`41`	`41`
`42`	`42`	`if (!isPlainObject(inputState)) {`
	`43`	`+ const match = Object.prototype.toString`
	`44`	`+ .call(inputState)`
	`45`	`+ .match(/\s([a-z\|A-Z]+)/)`
	`46`	`+ const matchType = match ? match[1] : ''`
`43`	`47`	`return (`
`44`	`48`	`The ${argumentName} has unexpected type of "` +
`45`		`- ({} as any).toString.call(inputState).match(/\s([a-z\|A-Z]+)/)[1] +`
	`49`	`+ matchType +`
`46`	`50`	`". Expected argument to be an object with the following ` +
`47`	`51`	`keys: "${reducerKeys.join('", "')}"`
`48`	`52`	`)`