diff --git a/lib/api/src/js/as_js.rs b/lib/api/src/js/as_js.rs
index 370be4520b5..8aca92aa918 100644
--- a/lib/api/src/js/as_js.rs
+++ b/lib/api/src/js/as_js.rs
@@ -36,18 +36,11 @@ pub trait AsJs: Sized {
 pub fn param_from_js(ty: &Type, js_val: &JsValue) -> Value {
     match ty {
         Type::I32 => Value::I32(js_val.as_f64().unwrap() as _),
-        Type::I64 => {
-            let number = js_val.as_f64().map(|f| f as i64).unwrap_or_else(|| {
-                if js_val.is_bigint() {
-                    // To support BigInt
-                    let big_num: u128 = js_sys::BigInt::from(js_val.clone()).try_into().unwrap();
-                    big_num as i64
-                } else {
-                    (js_sys::Number::from(js_val.clone()).as_f64().unwrap()) as i64
-                }
-            });
-            Value::I64(number)
-        }
+        Type::I64 => Value::I64(if js_val.is_bigint() {
+            js_val.clone().try_into().unwrap()
+        } else {
+            js_val.as_f64().unwrap() as _
+        }),
         Type::F32 => Value::F32(js_val.as_f64().unwrap() as _),
         Type::F64 => Value::F64(js_val.as_f64().unwrap()),
         Type::V128 => {