Merge pull request #192 from ScaleLeap/assert-marketplace-has-adverti…

…sing feat: adds assertMarketplaceHasAdvertising assertion function
ScaleLeap · May 17, 2020 · 31fe712 · 31fe712
2 parents 5e6fd39 + 33113b7
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diff --git a/README.md b/README.md
@@ -68,6 +68,13 @@ const CA = findAmazonMarketplace('countryCode', AmazonMarketplaceCountryCode.CA)
 // Function will throw an error if marketplace is not found
 // Thus return value is never undefined.
 const US = findAmazonMarketplaceOrFail('countryCode', AmazonMarketplaceCountryCode.US)
+
+// TypeScript assertion function that ensures that the marketplace has advertising enabled.
+// Throws if not.
+assertMarketplaceHasAdvertising(CA)
+
+// CA.advertising is now type guarded and can be safely accessed.
+console.log(CA.advertising.countryCode)
 ```
 
 ### Full Data Object Example