diff --git a/crates/backend/src/codegen/fn.rs b/crates/backend/src/codegen/fn.rs
index a2f3d42b..66973867 100644
--- a/crates/backend/src/codegen/fn.rs
+++ b/crates/backend/src/codegen/fn.rs
@@ -5,6 +5,7 @@ use syn::spanned::Spanned;
 use crate::{
   codegen::{get_intermediate_ident, js_mod_to_token_stream},
   BindgenResult, CallbackArg, Diagnostic, FnKind, FnSelf, NapiFn, NapiFnArgKind, TryToTokens,
+  TYPEDARRAY_SLICE_TYPES,
 };
 
 impl TryToTokens for NapiFn {
@@ -428,10 +429,7 @@ impl NapiFn {
         if let syn::Type::Slice(slice) = &**elem {
           if let syn::Type::Path(ele) = &*slice.elem {
             if let Some(syn::PathSegment { ident, .. }) = ele.path.segments.first() {
-              static TYPEDARRAY_SLICE_TYPES: &[&str] = &[
-                "u8", "i8", "u16", "i16", "u32", "i32", "f32", "f64", "u64", "i64",
-              ];
-              if TYPEDARRAY_SLICE_TYPES.contains(&&*ident.to_string()) {
+              if TYPEDARRAY_SLICE_TYPES.contains_key(&&*ident.to_string()) {
                 let q = quote! {
                   let #arg_name = {
                     #type_check
diff --git a/crates/backend/src/lib.rs b/crates/backend/src/lib.rs
index 16881cb6..aff83ba7 100644
--- a/crates/backend/src/lib.rs
+++ b/crates/backend/src/lib.rs
@@ -1,6 +1,9 @@
 #[macro_use]
 extern crate quote;
 
+use std::collections::HashMap;
+
+use once_cell::sync::Lazy;
 use proc_macro2::TokenStream;
 
 #[macro_use]
@@ -105,3 +108,18 @@ pub(crate) static PRIMITIVE_TYPES: &[(&str, (&str, bool, bool))] = &[
   ("JsSymbol", ("symbol", false, false)),
   ("JsFunction", ("(...args: any[]) => any", true, false)),
 ];
+
+pub(crate) static TYPEDARRAY_SLICE_TYPES: Lazy<HashMap<&str, &str>> = Lazy::new(|| {
+  HashMap::from([
+    ("u8", "Uint8Array"),
+    ("i8", "Int8Array"),
+    ("u16", "Uint16Array"),
+    ("i16", "Int16Array"),
+    ("u32", "Uint32Array"),
+    ("i32", "Int32Array"),
+    ("f32", "Float32Array"),
+    ("f64", "Float64Array"),
+    ("u64", "BigUint64Array"),
+    ("i64", "BigInt64Array"),
+  ])
+});
diff --git a/crates/backend/src/typegen.rs b/crates/backend/src/typegen.rs
index a05ba110..4e853151 100644
--- a/crates/backend/src/typegen.rs
+++ b/crates/backend/src/typegen.rs
@@ -6,7 +6,7 @@ pub(crate) mod r#struct;
 use std::{cell::RefCell, collections::HashMap, env};
 
 use once_cell::sync::Lazy;
-use syn::Type;
+use syn::{PathSegment, Type, TypePath, TypeSlice};
 
 pub static NAPI_RS_CLI_VERSION: Lazy<semver::Version> = Lazy::new(|| {
   let version = env::var("CARGO_CFG_NAPI_RS_CLI_VERSION").unwrap_or_else(|_| "0.0.0".to_string());
@@ -147,11 +147,14 @@ static KNOWN_TYPES: Lazy<HashMap<&'static str, (&'static str, bool, bool)>> = La
     ("Value", ("any", false, false)),
     ("Map", ("Record<string, any>", false, false)),
     ("HashMap", ("Record<{}, {}>", false, false)),
+    ("BTreeMap", ("Record<{}, {}>", false, false)),
+    ("IndexMap", ("Record<{}, {}>", false, false)),
     ("ArrayBuffer", ("ArrayBuffer", false, false)),
     ("JsArrayBuffer", ("ArrayBuffer", false, false)),
     ("Int8Array", ("Int8Array", false, false)),
     ("Uint8Array", ("Uint8Array", false, false)),
     ("Uint8ClampedArray", ("Uint8ClampedArray", false, false)),
+    ("Uint8ClampedSlice", ("Uint8ClampedArray", false, false)),
     ("Int16Array", ("Int16Array", false, false)),
     ("Uint16Array", ("Uint16Array", false, false)),
     ("Int32Array", ("Int32Array", false, false)),
@@ -166,6 +169,7 @@ static KNOWN_TYPES: Lazy<HashMap<&'static str, (&'static str, bool, bool)>> = La
     ("Date", ("Date", false, false)),
     ("JsDate", ("Date", false, false)),
     ("JsBuffer", ("Buffer", false, false)),
+    ("BufferSlice", ("Buffer", false, false)),
     ("Buffer", ("Buffer", false, false)),
     ("Vec", ("Array<{}>", false, false)),
     ("Result", ("Error | {}", false, true)),
@@ -445,6 +449,16 @@ pub fn ty_to_ts_type(
         ty_to_ts_type(&p.elem, is_return_ty, is_struct_field, false);
       (element_type, is_optional)
     }
+    Type::Slice(TypeSlice { elem, .. }) => {
+      if let Type::Path(TypePath { path, .. }) = &**elem {
+        if let Some(PathSegment { ident, .. }) = path.segments.last() {
+          if let Some(js_type) = crate::TYPEDARRAY_SLICE_TYPES.get(&ident.to_string().as_str()) {
+            return (js_type.to_string(), false);
+          }
+        }
+      }
+      ("any[]".to_owned(), false)
+    }
     _ => ("any".to_owned(), false),
   }
 }
diff --git a/examples/napi/__tests__/__snapshots__/typegen.spec.ts.md b/examples/napi/__tests__/__snapshots__/typegen.spec.ts.md
index 93e4c626..d82ccfe6 100644
--- a/examples/napi/__tests__/__snapshots__/typegen.spec.ts.md
+++ b/examples/napi/__tests__/__snapshots__/typegen.spec.ts.md
@@ -85,7 +85,7 @@ Generated by [AVA](https://avajs.dev).
       constructor(name: string)␊
       getCount(): number␊
       getNameAsync(): Promise<string>␊
-      acceptSliceMethod(slice: any): number␊
+      acceptSliceMethod(slice: Uint8Array): number␊
     }␊
     ␊
     /** Smoking test for type generation */␊
@@ -247,7 +247,7 @@ Generated by [AVA](https://avajs.dev).
       foo: number␊
     }␊
     ␊
-    export function acceptSlice(fixture: any): bigint␊
+    export function acceptSlice(fixture: Uint8Array): bigint␊
     ␊
     export function acceptThreadsafeFunction(func: (err: Error | null, arg: number) => any): void␊
     ␊
@@ -423,15 +423,15 @@ Generated by [AVA](https://avajs.dev).
     ␊
     export function enumToI32(e: CustomNumEnum): number␊
     ␊
-    export function f32ArrayToArray(input: any): Array<number>␊
+    export function f32ArrayToArray(input: Float32Array): Array<number>␊
     ␊
-    export function f64ArrayToArray(input: any): Array<number>␊
+    export function f64ArrayToArray(input: Float64Array): Array<number>␊
     ␊
     export function fibonacci(n: number): number␊
     ␊
     export function fnReceivedAliased(s: AliasedStruct, e: ALIAS): void␊
     ␊
-    export function getBtreeMapping(): BTreeMap␊
+    export function getBtreeMapping(): Record<string, number>␊
     ␊
     export function getBuffer(): Buffer␊
     ␊
@@ -443,7 +443,7 @@ Generated by [AVA](https://avajs.dev).
     ␊
     export function getGlobal(): typeof global␊
     ␊
-    export function getIndexMapping(): IndexMap␊
+    export function getIndexMapping(): Record<string, number>␊
     ␊
     export function getMapping(): Record<string, number>␊
     ␊
@@ -468,15 +468,15 @@ Generated by [AVA](https://avajs.dev).
     ␊
     export function getWords(): Array<string>␊
     ␊
-    export function i16ArrayToArray(input: any): Array<number>␊
+    export function i16ArrayToArray(input: Int16Array): Array<number>␊
     ␊
-    export function i32ArrayToArray(input: any): Array<number>␊
+    export function i32ArrayToArray(input: Int32Array): Array<number>␊
     ␊
-    export function i64ArrayToArray(input: any): Array<number>␊
+    export function i64ArrayToArray(input: BigInt64Array): Array<number>␊
     ␊
-    export function i8ArrayToArray(input: any): Array<number>␊
+    export function i8ArrayToArray(input: Int8Array): Array<number>␊
     ␊
-    export function indexmapPassthrough(fixture: IndexMap): IndexMap␊
+    export function indexmapPassthrough(fixture: Record<string, number>): Record<string, number>␊
     ␊
     /** default enum values are continuos i32s start from 0 */␊
     export const enum Kind {␊
@@ -604,9 +604,9 @@ Generated by [AVA](https://avajs.dev).
       name: string␊
     }␊
     ␊
-    export function sumBtreeMapping(nums: BTreeMap): number␊
+    export function sumBtreeMapping(nums: Record<string, number>): number␊
     ␊
-    export function sumIndexMapping(nums: IndexMap): number␊
+    export function sumIndexMapping(nums: Record<string, number>): number␊
     ␊
     export function sumMapping(nums: Record<string, number>): number␊
     ␊
@@ -649,13 +649,13 @@ Generated by [AVA](https://avajs.dev).
       typeOverrideOptional?: object␊
     }␊
     ␊
-    export function u16ArrayToArray(input: any): Array<number>␊
+    export function u16ArrayToArray(input: Uint16Array): Array<number>␊
     ␊
-    export function u32ArrayToArray(input: any): Array<number>␊
+    export function u32ArrayToArray(input: Uint32Array): Array<number>␊
     ␊
-    export function u64ArrayToArray(input: any): Array<bigint>␊
+    export function u64ArrayToArray(input: BigUint64Array): Array<bigint>␊
     ␊
-    export function u8ArrayToArray(input: any): Array<number>␊
+    export function u8ArrayToArray(input: Uint8Array): Array<number>␊
     ␊
     export interface UseNullableStruct {␊
       requiredNumberField: number␊
diff --git a/examples/napi/__tests__/__snapshots__/typegen.spec.ts.snap b/examples/napi/__tests__/__snapshots__/typegen.spec.ts.snap
index d8e2ce56..a5c5f0a0 100644
Binary files a/examples/napi/__tests__/__snapshots__/typegen.spec.ts.snap and b/examples/napi/__tests__/__snapshots__/typegen.spec.ts.snap differ
diff --git a/examples/napi/__tests__/__snapshots__/values.spec.ts.snap b/examples/napi/__tests__/__snapshots__/values.spec.ts.snap
index f693200f..84b41386 100644
Binary files a/examples/napi/__tests__/__snapshots__/values.spec.ts.snap and b/examples/napi/__tests__/__snapshots__/values.spec.ts.snap differ
diff --git a/examples/napi/index.d.ts b/examples/napi/index.d.ts
index 814003eb..800e9771 100644
--- a/examples/napi/index.d.ts
+++ b/examples/napi/index.d.ts
@@ -75,7 +75,7 @@ export class Bird {
   constructor(name: string)
   getCount(): number
   getNameAsync(): Promise<string>
-  acceptSliceMethod(slice: any): number
+  acceptSliceMethod(slice: Uint8Array): number
 }
 
 /** Smoking test for type generation */
@@ -237,7 +237,7 @@ export interface A {
   foo: number
 }
 
-export function acceptSlice(fixture: any): bigint
+export function acceptSlice(fixture: Uint8Array): bigint
 
 export function acceptThreadsafeFunction(func: (err: Error | null, arg: number) => any): void
 
@@ -413,15 +413,15 @@ export const enum Empty {
 
 export function enumToI32(e: CustomNumEnum): number
 
-export function f32ArrayToArray(input: any): Array<number>
+export function f32ArrayToArray(input: Float32Array): Array<number>
 
-export function f64ArrayToArray(input: any): Array<number>
+export function f64ArrayToArray(input: Float64Array): Array<number>
 
 export function fibonacci(n: number): number
 
 export function fnReceivedAliased(s: AliasedStruct, e: ALIAS): void
 
-export function getBtreeMapping(): BTreeMap
+export function getBtreeMapping(): Record<string, number>
 
 export function getBuffer(): Buffer
 
@@ -433,7 +433,7 @@ export function getExternal(external: ExternalObject<number>): number
 
 export function getGlobal(): typeof global
 
-export function getIndexMapping(): IndexMap
+export function getIndexMapping(): Record<string, number>
 
 export function getMapping(): Record<string, number>
 
@@ -458,15 +458,15 @@ export function getUndefined(): void
 
 export function getWords(): Array<string>
 
-export function i16ArrayToArray(input: any): Array<number>
+export function i16ArrayToArray(input: Int16Array): Array<number>
 
-export function i32ArrayToArray(input: any): Array<number>
+export function i32ArrayToArray(input: Int32Array): Array<number>
 
-export function i64ArrayToArray(input: any): Array<number>
+export function i64ArrayToArray(input: BigInt64Array): Array<number>
 
-export function i8ArrayToArray(input: any): Array<number>
+export function i8ArrayToArray(input: Int8Array): Array<number>
 
-export function indexmapPassthrough(fixture: IndexMap): IndexMap
+export function indexmapPassthrough(fixture: Record<string, number>): Record<string, number>
 
 /** default enum values are continuos i32s start from 0 */
 export const enum Kind {
@@ -594,9 +594,9 @@ export interface StrictObject {
   name: string
 }
 
-export function sumBtreeMapping(nums: BTreeMap): number
+export function sumBtreeMapping(nums: Record<string, number>): number
 
-export function sumIndexMapping(nums: IndexMap): number
+export function sumIndexMapping(nums: Record<string, number>): number
 
 export function sumMapping(nums: Record<string, number>): number
 
@@ -639,13 +639,13 @@ export interface TsTypeChanged {
   typeOverrideOptional?: object
 }
 
-export function u16ArrayToArray(input: any): Array<number>
+export function u16ArrayToArray(input: Uint16Array): Array<number>
 
-export function u32ArrayToArray(input: any): Array<number>
+export function u32ArrayToArray(input: Uint32Array): Array<number>
 
-export function u64ArrayToArray(input: any): Array<bigint>
+export function u64ArrayToArray(input: BigUint64Array): Array<bigint>
 
-export function u8ArrayToArray(input: any): Array<number>
+export function u8ArrayToArray(input: Uint8Array): Array<number>
 
 export interface UseNullableStruct {
   requiredNumberField: number