chore: upgrade to TypeScript 5 (#8488)

- upgrade to TypeScript 5
- upgrade @ampproject/remapping
- remove obsolete workarounds

---------

Co-authored-by: Simon Holthausen <simon.holthausen@vercel.com>

package.json

@@ -99,7 +99,7 @@
     "dev": "rollup -cw",
     "posttest": "agadoo internal/index.mjs",
     "prepublishOnly": "node check_publish_env.js && npm run lint && npm run build && npm test",
-    "tsd": "node ./generate-type-definitions.js",
+    "tsd": "tsc -p src/compiler --emitDeclarationOnly && tsc -p src/runtime --emitDeclarationOnly",
     "lint": "eslint \"{src,test}/**/*.{ts,js}\" --cache"
   },
   "repository": {
@@ -119,7 +119,7 @@
   },
   "homepage": "https://svelte.dev",
   "devDependencies": {
-    "@ampproject/remapping": "^0.3.0",
+    "@ampproject/remapping": "^2.2.1",
     "@jridgewell/sourcemap-codec": "^1.4.15",
     "@rollup/plugin-commonjs": "^11.0.0",
     "@rollup/plugin-json": "^6.0.0",
@@ -157,7 +157,7 @@
     "source-map-support": "^0.5.21",
     "tiny-glob": "^0.2.9",
     "tslib": "^2.5.0",
-    "typescript": "^3.7.5",
+    "typescript": "^5.0.4",
     "util": "^0.12.5"
   }
 }

src/compiler/compile/Component.ts

@@ -1,3 +1,4 @@
+import type { DecodedSourceMap, RawSourceMap } from '@ampproject/remapping';
 import { walk } from 'estree-walker';
 import { getLocator } from 'locate-character';
 import Stats from '../Stats';
@@ -32,7 +33,6 @@ import { print, b } from 'code-red';
 import { is_reserved_keyword } from './utils/reserved_keywords';
 import { apply_preprocessor_sourcemap } from '../utils/mapped_code';
 import Element from './nodes/Element';
-import { DecodedSourceMap, RawSourceMap } from '@ampproject/remapping/dist/types/types';
 import { clone } from '../utils/clone';
 import compiler_warnings from './compiler_warnings';
 import compiler_errors from './compiler_errors';

src/compiler/compile/render_dom/index.ts

@@ -1,3 +1,4 @@
+import type { RawSourceMap, DecodedSourceMap } from '@ampproject/remapping';
 import { b, x, p } from 'code-red';
 import Component from '../Component';
 import Renderer from './Renderer';
@@ -8,7 +9,6 @@ import { invalidate } from './invalidate';
 import Block from './Block';
 import { ImportDeclaration, ClassDeclaration, FunctionExpression, Node, Statement, ObjectExpression, Expression } from 'estree';
 import { apply_preprocessor_sourcemap } from '../../utils/mapped_code';
-import { RawSourceMap, DecodedSourceMap } from '@ampproject/remapping/dist/types/types';
 import { flatten } from '../../utils/flatten';
 import check_enable_sourcemap from '../utils/check_enable_sourcemap';
 import { push_array } from '../../utils/push_array';

src/compiler/index.ts

@@ -2,6 +2,6 @@ export { default as compile } from './compile/index';
 export { default as parse } from './parse/index';
 export { default as preprocess } from './preprocess/index';
 export { walk } from 'estree-walker';
+export type { CompileOptions, ModuleFormat, EnableSourcemap, CssHashGetter } from './interfaces';
 
 export const VERSION = '__VERSION__';
-// additional exports added through generate-type-definitions.js

src/compiler/preprocess/index.ts

@@ -1,4 +1,4 @@
-import { RawSourceMap, DecodedSourceMap } from '@ampproject/remapping/dist/types/types';
+import type { RawSourceMap, DecodedSourceMap } from '@ampproject/remapping';
 import { getLocator } from 'locate-character';
 import { MappedCode, SourceLocation, parse_attached_sourcemap, sourcemap_add_offset, combine_sourcemaps } from '../utils/mapped_code';
 import { decode_map } from './decode_sourcemap';
@@ -57,7 +57,7 @@ class PreprocessResult implements Source {
 
 	to_processed(): Processed {
 		// Combine all the source maps for each preprocessor function into one
-		const map: RawSourceMap = combine_sourcemaps(this.file_basename, this.sourcemap_list);
+		const map = combine_sourcemaps(this.file_basename, this.sourcemap_list);
 
 		return {
 			// TODO return separated output, in future version where svelte.compile supports it:

src/compiler/utils/mapped_code.ts

@@ -1,4 +1,4 @@
-import { DecodedSourceMap, RawSourceMap, SourceMapLoader } from '@ampproject/remapping/dist/types/types';
+import type { DecodedSourceMap, RawSourceMap, SourceMapLoader } from '@ampproject/remapping';
 import remapping from '@ampproject/remapping';
 import { SourceMap } from 'magic-string';
 import { Source, Processed } from '../preprocess/types';
@@ -216,11 +216,11 @@ export class MappedCode {
 export function combine_sourcemaps(
 	filename: string,
 	sourcemap_list: Array<DecodedSourceMap | RawSourceMap>
-): RawSourceMap {
+) {
 	if (sourcemap_list.length == 0) return null;
 
 	let map_idx = 1;
-	const map: RawSourceMap =
+	const map =
 		sourcemap_list.slice(0, -1)
 			.find(m => m.sources.length !== 1) === undefined
 

src/runtime/index.ts

@@ -13,5 +13,5 @@ export {
 	createEventDispatcher,
 	SvelteComponentDev as SvelteComponent,
 	SvelteComponentTyped
-	// additional exports added through generate-type-definitions.js
 } from 'svelte/internal';
+export type { ComponentType, ComponentConstructorOptions, ComponentProps, ComponentEvents } from 'svelte/internal';

src/runtime/motion/tweened.ts

@@ -122,7 +122,7 @@ export function tweened<T>(value?: T, defaults: Options<T> = {}): Tweened<T> {
 
 			const elapsed = now - start;
 
-			if (elapsed > duration) {
+			if (elapsed > <number> duration) {
 				store.set(value = new_value);
 				return false;
 			}

tsconfig.json

@@ -6,7 +6,7 @@
 
 		// target node v8+ (https://node.green/)
 		// the only missing feature is Array.prototype.values
-		"lib": ["es2017"],
+		"lib": ["es2017", "DOM"],
 		"target": "es2017",
 
 		"declaration": true,