Add typings

index.d.ts

@@ -0,0 +1,27 @@
+export function supports (...manifests: Array<Partial<IManifest>>): IManifest
+
+export interface IManifest {
+  bufferKeys: boolean
+  snapshots: boolean
+  permanence: boolean
+  seek: boolean
+  clear: boolean
+  getMany: boolean
+  keyIterator: boolean
+  valueIterator: boolean
+  iteratorNextv: boolean
+  iteratorAll: boolean
+  status: boolean
+  idempotentOpen: boolean
+  passiveOpen: boolean
+  serialize: boolean
+  createIfMissing: boolean
+  errorIfExists: boolean
+  deferredOpen: boolean
+  openCallback: boolean
+  promises: boolean
+  streams: boolean
+  encodings: Record<string, boolean>
+  events: Record<string, boolean>
+  additionalMethods: Record<string, boolean>
+}

index.js

@@ -4,7 +4,6 @@ exports.supports = function supports (...manifests) {
   const manifest = manifests.reduce((acc, m) => Object.assign(acc, m), {})
 
   return Object.assign(manifest, {
-    // Features of abstract-leveldown
     bufferKeys: manifest.bufferKeys || false,
     snapshots: manifest.snapshots || false,
     permanence: manifest.permanence || false,
@@ -15,18 +14,12 @@ exports.supports = function supports (...manifests) {
     valueIterator: manifest.valueIterator || false,
     iteratorNextv: manifest.iteratorNextv || false,
     iteratorAll: manifest.iteratorAll || false,
-
-    // Features of abstract-leveldown that levelup doesn't have
     status: manifest.status || false,
     idempotentOpen: manifest.idempotentOpen || false,
     passiveOpen: manifest.passiveOpen || false,
     serialize: manifest.serialize || false,
-
-    // Features of disk-based implementations
     createIfMissing: manifest.createIfMissing || false,
     errorIfExists: manifest.errorIfExists || false,
-
-    // Features of level(up) that abstract-leveldown doesn't have yet
     deferredOpen: manifest.deferredOpen || false,
     openCallback: manifest.openCallback || false,
     promises: manifest.promises || false,

package.json

@@ -4,24 +4,30 @@
   "description": "Create a manifest describing the abilities of a levelup or abstract-leveldown db",
   "license": "MIT",
   "scripts": {
-    "test": "standard && hallmark && (nyc -s node test/self.js | faucet) && nyc report",
+    "test": "ts-standard && tsc && standard && hallmark && (nyc -s node test/self.js | faucet) && nyc report",
     "test-browsers-local": "airtap --coverage test/self.js",
     "coverage": "nyc report -r lcovonly",
     "hallmark": "hallmark --fix"
   },
+  "types": "./index.d.ts",
   "files": [
     "test",
     "CHANGELOG.md",
-    "index.js"
+    "index.js",
+    "index.d.ts"
   ],
   "devDependencies": {
+    "@types/node": "^16.11.6",
+    "@voxpelli/tsconfig": "^3.0.0",
     "airtap": "^4.0.3",
     "airtap-playwright": "^1.0.1",
     "faucet": "^0.0.1",
     "hallmark": "^3.1.0",
     "nyc": "^15.1.0",
     "standard": "^16.0.3",
-    "tape": "^5.0.1"
+    "tape": "^5.0.1",
+    "ts-standard": "^10.0.0",
+    "typescript": "^4.4.4"
   },
   "repository": {
     "type": "git",

tsconfig.json

@@ -0,0 +1,7 @@
+{
+  "extends": "@voxpelli/tsconfig/node12.json",
+  "compilerOptions": {
+    "checkJs": false
+  },
+  "include": ["*.ts"]
+}