feat: React.useRef<Option<usize>>

Author: EqualMa

README.md

@@ -12,7 +12,7 @@ Rust bindings for `React`.
 `Cargo.toml`
 
 ```toml
-react-sys = "1.0.0-alpha.7"
+react-sys = "1.0.0-alpha.8"
 ```
 
 Though the version is at `1.x-alpha`,

src/use_ref/helpers.rs

@@ -9,6 +9,12 @@ define_react_use_ref_helpers! {
         use_ref_usize,
         use_ref_usize_with,
     },
+    {
+        value: Option<usize>,
+        object: MutableRefObjectOptionalUsize,
+        use_ref_optional_usize,
+        use_ref_optional_usize_with,
+    },
     {
         value: bool,
         object: MutableRefObjectBool,