do a bunch of easy ones by hand

src/compiler/parse/errors.js

@@ -1,5 +1,6 @@
 // All parser errors should be listed and accessed from here
 import list from '../utils/list.js';
+
 /**
  * @internal
  */

src/compiler/parse/index.js

@@ -6,7 +6,7 @@ import full_char_code_at from '../utils/full_char_code_at';
 import error from '../utils/error';
 import parser_errors from './errors';
 const regex_position_indicator = / \(\d+:\d+\)$/;
-/** */
+
 export class Parser {
 	/**
 	 * @readonly
@@ -32,39 +32,39 @@ export class Parser {
 	 */
 	css_mode = undefined;
 
-	/**
-	 * @default 0 */
 	index = 0;
 
 	/**
-	 * @default []
-	 * @type {TemplateNode[]}
+	 * @type {import('../interfaces.js').TemplateNode[]}
 	 */
 	stack = [];
 
 	/**
-	 * @type {Fragment} */
+	 * @type {import('../interfaces.js').Fragment}
+	 */
 	html = undefined;
 
 	/**
-	 * @default []
-	 * @type {Style[]}
+	 * @type {import('../interfaces.js').Style[]}
 	 */
 	css = [];
 
 	/**
-	 * @default []
-	 * @type {Script[]}
+	 * @type {import('../interfaces.js').Script[]}
 	 */
 	js = [];
 
-	/**
-	 * @default {} */
 	meta_tags = {};
 
 	/**
-	 * @type {LastAutoClosedTag} */
+	 * @type {LastAutoClosedTag}
+	 */
 	last_auto_closed_tag = undefined;
+
+	/**
+	 * @param {string} template
+	 * @param {import('../interfaces.js').ParserOptions} options
+	 */
 	constructor(template, options) {
 		if (typeof template !== 'string') {
 			throw new TypeError('Template must be a string');
@@ -80,6 +80,7 @@ export class Parser {
 			children: []
 		};
 		this.stack.push(this.html);
+		/** @type {ParserState} */
 		let state = fragment;
 		while (this.index < this.template.length) {
 			state = state(this) || fragment;
@@ -118,7 +119,8 @@ export class Parser {
 	}
 
 	/**
-	 * @param {any} err */
+	 * @param {any} err
+	 */
 	acorn_error(err) {
 		this.error(
 			{
@@ -130,7 +132,8 @@ export class Parser {
 	}
 
 	/**
-	 * @param {{ code: string; message: string }} */
+	 * @param {{ code: string; message: string }} err
+	 */
 	error({ code, message }, index = this.index) {
 		error(message, {
 			name: 'ParseError',
@@ -143,8 +146,8 @@ export class Parser {
 
 	/**
 	 * @param {string} str
-	 * @param {boolean} required
-	 * @param {{ code: string; message: string }} error
+	 * @param {boolean} [required]
+	 * @param {{ code: string; message: string }} [error]
 	 */
 	eat(str, required, error) {
 		if (this.match(str)) {
@@ -163,7 +166,8 @@ export class Parser {
 	}
 
 	/**
-	 * @param {string} str */
+	 * @param {string} str
+	 */
 	match(str) {
 		return this.template.slice(this.index, this.index + str.length) === str;
 	}
@@ -216,7 +220,7 @@ export class Parser {
 
 	/**
 	 * @param {RegExp} pattern
-	 * @param {Parameters<Parser['error']>[0]} error_message
+	 * @param {Parameters<Parser['error']>[0]} [error_message]
 	 */
 	read_until(pattern, error_message) {
 		if (this.index >= this.template.length) {
@@ -249,8 +253,8 @@ export class Parser {
 
 /**
  * @param {string} template
- * @param {ParserOptions} options
- * @returns {Ast}
+ * @param {import('../interfaces.js').ParserOptions} options
+ * @returns {import('../interfaces.js').Ast}
  */
 export default function parse(template, options = {}) {
 	const parser = new Parser(template, options);
@@ -275,9 +279,14 @@ export default function parse(template, options = {}) {
 	};
 }
 
-/** @typedef {(parser: Parser) => ParserState | void} ParserState */
+/**
+ * @internal
+ * @typedef {(parser: Parser) => ParserState | void} ParserState
+ */
 
-/** @typedef {Object} LastAutoClosedTag
+/**
+ * @internal
+ * @typedef {Object} LastAutoClosedTag
  * @property {string} tag
  * @property {string} reason
  * @property {number} depth

src/compiler/parse/read/context.js

@@ -1,18 +1,20 @@
-import { Parser } from '../index';
 import { isIdentifierStart } from 'acorn';
-import full_char_code_at from '../../utils/full_char_code_at';
+import full_char_code_at from '../../utils/full_char_code_at.js';
 import {
 	is_bracket_open,
 	is_bracket_close,
 	is_bracket_pair,
 	get_bracket_close
-} from '../utils/bracket';
-import { parse_expression_at } from '../acorn';
-import { Pattern } from 'estree';
-import parser_errors from '../errors';
-import { regex_not_newline_characters } from '../../utils/patterns';
+} from '../utils/bracket.js';
+import { parse_expression_at } from '../acorn.js';
+import parser_errors from '../errors.js';
+import { regex_not_newline_characters } from '../../utils/patterns.js';
 
-export default function read_context(parser: Parser): Pattern & { start: number; end: number } {
+/**
+ * @param {import('../index.js').Parser} parser
+ * @returns {Pattern & { start: number; end: number }}
+ */
+export default function read_context(parser) {
 	const start = parser.index;
 	let i = parser.index;
 

src/compiler/parse/read/expression.js

@@ -1,10 +1,12 @@
-import { parse_expression_at } from '../acorn';
-import { Parser } from '../index';
-import { Node } from 'estree';
-import { regex_whitespace } from '../../utils/patterns';
-import parser_errors from '../errors';
-
-export default function read_expression(parser: Parser): Node {
+import { parse_expression_at } from '../acorn.js';
+import { regex_whitespace } from '../../utils/patterns.js';
+import parser_errors from '../errors.js';
+
+/**
+ * @param {import('../index.js').Parser} parser
+ * @returns {import('estree').Node | undefined}
+ */
+export default function read_expression(parser) {
 	try {
 		const node = parse_expression_at(parser.template, parser.index);
 
@@ -29,7 +31,7 @@ export default function read_expression(parser: Parser): Node {
 
 		parser.index = index;
 
-		return node as Node;
+		return node;
 	} catch (err) {
 		parser.acorn_error(err);
 	}

src/compiler/parse/state/fragment.js

@@ -0,0 +1,18 @@
+import tag from './tag.js';
+import mustache from './mustache.js';
+import text from './text.js';
+
+/**
+ * @param {import('../index.js').Parser} parser
+ */
+export default function fragment(parser) {
+	if (parser.match('<')) {
+		return tag;
+	}
+
+	if (parser.match('{')) {
+		return mustache;
+	}
+
+	return text;
+}

src/compiler/parse/state/fragment.ts

@@ -1,16 +0,0 @@
-import tag from './tag';
-import mustache from './mustache';
-import text from './text';
-import { Parser } from '../index';
-
-export default function fragment(parser: Parser) {
-	if (parser.match('<')) {
-		return tag;
-	}
-
-	if (parser.match('{')) {
-		return mustache;
-	}
-
-	return text;
-}

src/compiler/parse/state/text.js

@@ -1,7 +1,9 @@
-import { decode_character_references } from '../utils/html';
-import { Parser } from '../index';
+import { decode_character_references } from '../utils/html.js';
 
-export default function text(parser: Parser) {
+/**
+ * @param {import('../index.js').Parser} parser
+ */
+export default function text(parser) {
 	const start = parser.index;
 
 	let data = '';

src/compiler/parse/utils/node.js

@@ -1,6 +1,7 @@
-import { TemplateNode } from '../../interfaces';
-
-export function to_string(node: TemplateNode) {
+/**
+ * @param {import("../../interfaces.js").TemplateNode} node
+ */
+export function to_string(node) {
 	switch (node.type) {
 		case 'IfBlock':
 			return '{#if} block';