chore: biomejs and stricter typescript

.editorconfig

@@ -0,0 +1,12 @@
+# http://editorconfig.org
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+end_of_line = lf
+insert_final_newline = true
+
+indent_style = space
+indent_size = 2
+charset = utf-8
+trim_trailing_whitespace = true

.github/workflows/CI.yml

@@ -17,11 +17,10 @@ jobs:
           node-version: 'lts/*'
           cache: 'npm'
       - run: npm ci
-      - run: npm run format-check
-      - run: npm run lint
-        working-directory: ./packages/jsondiffpatch
       - run: npm run build
         working-directory: ./packages/jsondiffpatch
+      - run: npm run lint
+      - run: npm run type-check
       - run: npm run test
         working-directory: ./packages/jsondiffpatch
       - run: npm run start

biome.jsonc

@@ -0,0 +1,28 @@
+{
+	"$schema": "https://biomejs.dev/schemas/1.6.4/schema.json",
+	"organizeImports": {
+		"enabled": true
+	},
+	"linter": {
+		"enabled": true,
+		"rules": {
+			"recommended": true,
+			"correctness": {
+				"noUnusedImports": "error",
+				"noUnusedVariables": "error",
+				"useHookAtTopLevel": "error"
+			},
+			"style": {
+				"useCollapsedElseIf": "error",
+				"useShorthandArrayType": "error",
+				"useForOf": "error"
+			},
+			"suspicious": {
+				"noEmptyBlockStatements": "error"
+			}
+		}
+	},
+	"files": {
+		"ignore": ["node_modules", "dist", "build", "lib", "coverage"]
+	}
+}

demos/console-demo/demo.ts

@@ -1,169 +1,176 @@
-import * as consoleFormatter from 'jsondiffpatch/formatters/console';
-import * as jsondiffpatch from 'jsondiffpatch/with-text-diffs';
+import * as consoleFormatter from "jsondiffpatch/formatters/console";
+import * as jsondiffpatch from "jsondiffpatch/with-text-diffs";
 
 const instance = jsondiffpatch.create({
-  objectHash: function (obj) {
-    const objRecord = obj as Record<string, string>;
-    return (
-      objRecord._id ||
-      objRecord.id ||
-      objRecord.name ||
-      JSON.stringify(objRecord)
-    );
-  },
+	objectHash: (obj) => {
+		const objRecord = obj as Record<string, string>;
+		return (
+			objRecord._id ||
+			objRecord.id ||
+			objRecord.name ||
+			JSON.stringify(objRecord)
+		);
+	},
 });
 
-interface Data {
-  name: string;
-  summary: string;
-  surface?: number;
-  timezone: number[];
-  demographics: { population: number; largestCities: string[] };
-  languages: string[];
-  countries: {
-    name: string;
-    capital?: string;
-    independence?: Date;
-    population?: number;
-  }[];
-  spanishName?: string;
+interface Continent {
+	name: string;
+	summary: string;
+	surface?: number;
+	timezone: [number, number];
+	demographics: { population: number; largestCities: string[] };
+	languages: string[];
+	countries: Country[];
+	spanishName?: string;
 }
 
-const data: Data = {
-  name: 'South America',
-  summary:
-    'South America (Spanish: América del Sur, Sudamérica or Suramérica;' +
-    ' Portuguese: América do Sul; Quechua and Aymara: Urin Awya Yala;' +
-    ' Guarani: Ñembyamérika; Dutch: Zuid-Amerika; French: Amérique du Sud)' +
-    ' is a continent situated in the Western Hemisphere, mostly in the' +
-    ' Southern Hemisphere, with a relatively small portion in the Northern' +
-    ' Hemisphere. The continent is also considered a subcontinent of the' +
-    ' Americas.[2][3] It is bordered on the west by the Pacific Ocean and' +
-    ' on the north and east by the Atlantic Ocean; North America and the' +
-    ' Caribbean Sea lie to the northwest. It includes twelve countries: ' +
-    'Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Guyana, Paraguay' +
-    ', Peru, Suriname, Uruguay, and Venezuela. The South American nations' +
-    ' that border the Caribbean Sea—including Colombia, Venezuela, Guyana,' +
-    ' Suriname, as well as French Guiana, which is an overseas region of' +
-    ' France—are also known as Caribbean South America. South America has' +
-    ' an area of 17,840,000 square kilometers (6,890,000 sq mi).' +
-    ' Its population as of 2005 has been estimated at more than 371,090,000.' +
-    ' South America ranks fourth in area (after Asia, Africa, and' +
-    ' North America) and fifth in population (after Asia, Africa,' +
-    ' Europe, and North America). The word America was coined in 1507 by' +
-    ' cartographers Martin Waldseemüller and Matthias Ringmann, after' +
-    ' Amerigo Vespucci, who was the first European to suggest that the' +
-    ' lands newly discovered by Europeans were not India, but a New World' +
-    ' unknown to Europeans.',
+interface Country {
+	name: string;
+	capital?: string;
+	independence?: Date;
+	population?: number;
+}
+
+const data: Continent = {
+	name: "South America",
+	summary:
+		"South America (Spanish: América del Sur, Sudamérica or Suramérica;" +
+		" Portuguese: América do Sul; Quechua and Aymara: Urin Awya Yala;" +
+		" Guarani: Ñembyamérika; Dutch: Zuid-Amerika; French: Amérique du Sud)" +
+		" is a continent situated in the Western Hemisphere, mostly in the" +
+		" Southern Hemisphere, with a relatively small portion in the Northern" +
+		" Hemisphere. The continent is also considered a subcontinent of the" +
+		" Americas.[2][3] It is bordered on the west by the Pacific Ocean and" +
+		" on the north and east by the Atlantic Ocean; North America and the" +
+		" Caribbean Sea lie to the northwest. It includes twelve countries: " +
+		"Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Guyana, Paraguay" +
+		", Peru, Suriname, Uruguay, and Venezuela. The South American nations" +
+		" that border the Caribbean Sea—including Colombia, Venezuela, Guyana," +
+		" Suriname, as well as French Guiana, which is an overseas region of" +
+		" France—are also known as Caribbean South America. South America has" +
+		" an area of 17,840,000 square kilometers (6,890,000 sq mi)." +
+		" Its population as of 2005 has been estimated at more than 371,090,000." +
+		" South America ranks fourth in area (after Asia, Africa, and" +
+		" North America) and fifth in population (after Asia, Africa," +
+		" Europe, and North America). The word America was coined in 1507 by" +
+		" cartographers Martin Waldseemüller and Matthias Ringmann, after" +
+		" Amerigo Vespucci, who was the first European to suggest that the" +
+		" lands newly discovered by Europeans were not India, but a New World" +
+		" unknown to Europeans.",
 
-  surface: 17840000,
-  timezone: [-4, -2],
-  demographics: {
-    population: 385742554,
-    largestCities: [
-      'São Paulo',
-      'Buenos Aires',
-      'Rio de Janeiro',
-      'Lima',
-      'Bogotá',
-    ],
-  },
-  languages: [
-    'spanish',
-    'portuguese',
-    'english',
-    'dutch',
-    'french',
-    'quechua',
-    'guaraní',
-    'aimara',
-    'mapudungun',
-  ],
-  countries: [
-    {
-      name: 'Argentina',
-      capital: 'Buenos Aires',
-      independence: new Date(1816, 6, 9),
-    },
-    {
-      name: 'Bolivia',
-      capital: 'La Paz',
-      independence: new Date(1825, 7, 6),
-    },
-    {
-      name: 'Brazil',
-      capital: 'Brasilia',
-      independence: new Date(1822, 8, 7),
-    },
-    {
-      name: 'Chile',
-      capital: 'Santiago',
-      independence: new Date(1818, 1, 12),
-    },
-    {
-      name: 'Colombia',
-      capital: 'Bogotá',
-      independence: new Date(1810, 6, 20),
-    },
-    {
-      name: 'Ecuador',
-      capital: 'Quito',
-      independence: new Date(1809, 7, 10),
-    },
-    {
-      name: 'Guyana',
-      capital: 'Georgetown',
-      independence: new Date(1966, 4, 26),
-    },
-    {
-      name: 'Paraguay',
-      capital: 'Asunción',
-      independence: new Date(1811, 4, 14),
-    },
-    {
-      name: 'Peru',
-      capital: 'Lima',
-      independence: new Date(1821, 6, 28),
-    },
-    {
-      name: 'Suriname',
-      capital: 'Paramaribo',
-      independence: new Date(1975, 10, 25),
-    },
-    {
-      name: 'Uruguay',
-      capital: 'Montevideo',
-      independence: new Date(1825, 7, 25),
-    },
-    {
-      name: 'Venezuela',
-      capital: 'Caracas',
-      independence: new Date(1811, 6, 5),
-    },
-  ],
+	surface: 17840000,
+	timezone: [-4, -2],
+	demographics: {
+		population: 385742554,
+		largestCities: [
+			"São Paulo",
+			"Buenos Aires",
+			"Rio de Janeiro",
+			"Lima",
+			"Bogotá",
+		],
+	},
+	languages: [
+		"spanish",
+		"portuguese",
+		"english",
+		"dutch",
+		"french",
+		"quechua",
+		"guaraní",
+		"aimara",
+		"mapudungun",
+	],
+	countries: [
+		{
+			name: "Argentina",
+			capital: "Buenos Aires",
+			independence: new Date(1816, 6, 9),
+		},
+		{
+			name: "Bolivia",
+			capital: "La Paz",
+			independence: new Date(1825, 7, 6),
+		},
+		{
+			name: "Brazil",
+			capital: "Brasilia",
+			independence: new Date(1822, 8, 7),
+		},
+		{
+			name: "Chile",
+			capital: "Santiago",
+			independence: new Date(1818, 1, 12),
+		},
+		{
+			name: "Colombia",
+			capital: "Bogotá",
+			independence: new Date(1810, 6, 20),
+		},
+		{
+			name: "Ecuador",
+			capital: "Quito",
+			independence: new Date(1809, 7, 10),
+		},
+		{
+			name: "Guyana",
+			capital: "Georgetown",
+			independence: new Date(1966, 4, 26),
+		},
+		{
+			name: "Paraguay",
+			capital: "Asunción",
+			independence: new Date(1811, 4, 14),
+		},
+		{
+			name: "Peru",
+			capital: "Lima",
+			independence: new Date(1821, 6, 28),
+		},
+		{
+			name: "Suriname",
+			capital: "Paramaribo",
+			independence: new Date(1975, 10, 25),
+		},
+		{
+			name: "Uruguay",
+			capital: "Montevideo",
+			independence: new Date(1825, 7, 25),
+		},
+		{
+			name: "Venezuela",
+			capital: "Caracas",
+			independence: new Date(1811, 6, 5),
+		},
+	],
 };
 
 const left = JSON.parse(JSON.stringify(data), jsondiffpatch.dateReviver);
 
 data.summary = data.summary
-  .replace('Brazil', 'Brasil')
-  .replace('also known as', 'a.k.a.');
-data.languages[2] = 'inglés';
+	.replace("Brazil", "Brasil")
+	.replace("also known as", "a.k.a.");
+data.languages[2] = "inglés";
 data.countries.pop();
 data.countries.pop();
-data.countries[0].capital = 'Rawson';
+const firstCountry = data.countries[0];
+if (firstCountry) {
+	firstCountry.capital = "Rawson";
+}
 data.countries.push({
-  name: 'Antártida',
+	name: "Antártida",
 });
 
 // modify and move
-data.countries[4].population = 42888594;
-data.countries.splice(11, 0, data.countries.splice(4, 1)[0]);
-
-data.countries.splice(2, 0, data.countries.splice(7, 1)[0]);
+if (data.countries[4]) {
+	data.countries[4].population = 42888594;
+}
+data.countries.splice(11, 0, data.countries.splice(4, 1)[0] as Country);
+data.countries.splice(2, 0, data.countries.splice(7, 1)[0] as Country);
 
+// biome-ignore lint/performance/noDelete: allowed for demo purposes
 delete data.surface;
-data.spanishName = 'Sudamérica';
+data.spanishName = "Sudamérica";
 data.demographics.population += 2342;
 
 const right = data;