Generate .d.ts from JSDoc

See https://humanwhocodes.com/snippets/2020/10/create-typescript-declarations-from-javascript-jsdoc/

Author: mroderick

.nvmrc

@@ -0,0 +1 @@
+v14.15.0

package-lock.json

@@ -6,6 +6,7 @@
   "author": "Christian Johansen",
   "license": "BSD-3-Clause",
   "main": "./lib/samsam",
+  "types": "./dist/samsam.d.ts",
   "repository": {
     "type": "git",
     "url": "https://github.com/sinonjs/samsam.git"
@@ -15,9 +16,10 @@
   },
   "scripts": {
     "benchmark": "node lib/deep-equal-benchmark.js",
-    "build": "run-s build:dist-folder build:bundle",
+    "build": "run-s build:dist-folder build:bundle build:type-defs",
     "build:bundle": "rollup -c",
     "build:dist-folder": "mkdirp dist",
+    "build:type-defs": "tsc",
     "jsdoc": "jsdoc -c jsdoc.conf.json",
     "lint": "eslint .",
     "prepublishOnly": "npm run build && mkdocs gh-deploy -r upstream || mkdocs gh-deploy -r origin",
@@ -74,7 +76,8 @@
     "proxyquire-universal": "^2.1.0",
     "proxyquireify": "^3.2.1",
     "rollup": "^1.23.0",
-    "rollup-plugin-commonjs": "^10.1.0"
+    "rollup-plugin-commonjs": "^10.1.0",
+    "typescript": "^4.0.5"
   },
   "nyc": {
     "exclude": [

package.json

@@ -0,0 +1,10 @@
+{
+  "include": [
+      "dist/*.js"
+  ],
+  "compilerOptions": {
+    "declaration": true,
+    "emitDeclarationOnly": true,
+    "allowJs": true
+  }
+}