fix(web): correct type errors, improve build

(cherry picked from commit 4db3edadf4)

lib/binding_web/src/index.ts

@@ -1,4 +1,4 @@
-export {
+export type {
   Point,
   Range,
   Edit,
@@ -7,8 +7,8 @@ export {
   LogCallback,
 } from './constants';
 export {
-  ParseOptions,
-  ParseState,
+  type ParseOptions,
+  type ParseState,
   LANGUAGE_VERSION,
   MIN_COMPATIBLE_VERSION,
   Parser,
@@ -18,14 +18,14 @@ export { Tree } from './tree';
 export { Node } from './node';
 export { TreeCursor } from './tree_cursor';
 export {
-  QueryOptions,
-  QueryState,
-  QueryProperties,
-  QueryPredicate,
-  QueryCapture,
-  QueryMatch,
+  type QueryOptions,
+  type QueryState,
+  type QueryProperties,
+  type QueryPredicate,
+  type QueryCapture,
+  type QueryMatch,
   CaptureQuantifier,
-  PredicateStep,
+  type PredicateStep,
   Query,
-}  from './query';
+} from './query';
 export { LookaheadIterator } from './lookahead_iterator';

lib/binding_web/src/language.ts

@@ -6,7 +6,7 @@ import { Query } from './query';
 
 const LANGUAGE_FUNCTION_REGEX = /^tree_sitter_\w+$/;
 
-export class LanguageMetadata {
+export interface LanguageMetadata {
   readonly major_version: number;
   readonly minor_version: number;
   readonly patch_version: number;

lib/binding_web/src/marshal.ts

@@ -168,10 +168,9 @@ export function marshalEdit(edit: Edit, address = TRANSFER_BUFFER) {
  *
  * Unmarshals a {@link LanguageMetadata} from the transfer buffer.
  */
-export function unmarshalLanguageMetadata(address: number): LanguageMetadata {
-  const result = {} as LanguageMetadata;
-  result.major_version = C.getValue(address, 'i32'); address += SIZE_OF_INT;
-  result.minor_version = C.getValue(address, 'i32'); address += SIZE_OF_INT;
-  result.field_count = C.getValue(address, 'i32');
-  return result;
+export function unmarshalLanguageMetadata(address: number): LanguageMetadata {  
+  const major_version = C.getValue(address, 'i32');
+  const minor_version = C.getValue(address += SIZE_OF_INT, 'i32');
+  const patch_version = C.getValue(address += SIZE_OF_INT, 'i32');
+  return { major_version, minor_version, patch_version };
 }

lib/binding_web/src/node.ts

@@ -9,7 +9,8 @@ import { TRANSFER_BUFFER } from './parser';
 /** A single node within a syntax {@link Tree}. */
 export class Node {
   /** @internal */
-  private [0] = 0; // Internal handle for WASM
+  // @ts-expect-error: never read
+  private [0] = 0; // Internal handle for Wasm
 
   /** @internal */
   private _children?: (Node | null)[];
@@ -635,7 +636,7 @@ export class Node {
   }
 
   /** Get the S-expression representation of this node. */
-  toString() {
+  toString(): string {
     marshalNode(this);
     const address = C._ts_node_to_string_wasm(this.tree[0]);
     const result = C.AsciiToString(address);

lib/binding_web/src/tree_cursor.ts

@@ -7,16 +7,20 @@ import { getText, Tree } from './tree';
 /** A stateful object for walking a syntax {@link Tree} efficiently. */
 export class TreeCursor {
   /** @internal */
-  private [0] = 0; // Internal handle for WASM
+  // @ts-expect-error: never read
+  private [0] = 0; // Internal handle for Wasm
 
   /** @internal */
-  private [1] = 0; // Internal handle for WASM
+  // @ts-expect-error: never read
+  private [1] = 0; // Internal handle for Wasm
 
   /** @internal */
-  private [2] = 0; // Internal handle for WASM
+  // @ts-expect-error: never read
+  private [2] = 0; // Internal handle for Wasm
 
   /** @internal */
-  private [3] = 0; // Internal handle for WASM
+  // @ts-expect-error: never read
+  private [3] = 0; // Internal handle for Wasm
 
   /** @internal */
   private tree: Tree;