modify d.ts, modify function name

src/lib.rs

@@ -16,7 +16,7 @@ static ALLOC: jemallocator::Jemalloc = jemallocator::Jemalloc;
 register_module!(example, init);
 
 fn init(module: &mut Module) -> Result<()> {
-  module.create_named_method("diff", diff_char)?;
+  module.create_named_method("diffChars", diff_char)?;
   Ok(())
 }