Add isInstanceOf() next to getType() section (#48)

* Add isInstanceOf() next to getType() section * Update README.md --------- Co-authored-by: Luca Ban <[email protected]>
mesqueeb · May 31, 2023 · 9366f86 · 9366f86
1 parent 5895bc8
commit 9366f86
Showing 1 changed file with 12 additions and 0 deletions.
diff --git a/README.md b/README.md
@@ -180,6 +180,18 @@ getType('') // returns 'String'
 isType('', String) // returns true
 ```
 
+If you just want to make sure your object _inherits_ from a particular class or
+`toStringTag` value, you can use `isInstanceOf()` like this:
+
+```js
+import { isInstanceOf } from 'is-what'
+
+isInstanceOf(new XMLHttpRequest(), "EventTarget")
+// returns true
+isInstanceOf(globalThis, ReadableStream)
+// returns false
+```
+
 ## TypeScript
 
 is-what makes TypeScript know the type during if statements. This means that a check returns the type of the payload for TypeScript users.