Add types

package.json

@@ -27,7 +27,9 @@
   "contributors": [
     "Titus Wormer <[email protected]> (https://wooorm.com)"
   ],
+  "types": "types/index.d.ts",
   "files": [
+    "types/index.d.ts",
     "index.js",
     "factory.js",
     "html.js",
@@ -41,7 +43,9 @@
     "space-separated-tokens": "^1.0.0"
   },
   "devDependencies": {
+    "@types/hast": "^2.3.1",
     "browserify": "^16.0.0",
+    "dtslint": "^3.6.12",
     "nyc": "^15.0.0",
     "prettier": "^2.0.0",
     "remark-cli": "^8.0.0",
@@ -59,7 +63,8 @@
     "build": "npm run build-bundle && npm run build-mangle",
     "test-api": "node test",
     "test-coverage": "nyc --reporter lcov tape test.js",
-    "test": "npm run generate && npm run format && npm run build && npm run test-coverage"
+    "test-types": "dtslint types",
+    "test": "npm run generate && npm run format && npm run build && npm run test-coverage && npm run test-types"
   },
   "nyc": {
     "check-coverage": true,

types/hastscript-tests.ts

@@ -0,0 +1,11 @@
+import h = require('hastscript')
+
+h() // $ExpectType Element
+h('.bar', {class: 'bar'}) // $ExpectType Element
+h('.bar', 'child text') // $ExpectType Element
+h('.bar', ['child text']) // $ExpectType Element
+h('.foo', {class: 'bar'}, h('.baz')) // $ExpectType Element
+h('.foo', {class: 'bar'}, [h('.baz')]) // $ExpectType Element
+h('.bar',{class: 'bar'} , 'child text') // $ExpectType Element
+h('.bar',{class: 'bar'}, ['child text']) // $ExpectType Element
+h(false) // $ExpectError

types/index.d.ts

@@ -0,0 +1,18 @@
+// TypeScript Version: 3.5
+
+import {Element, Properties, Node} from 'hast'
+
+/**
+ * DSL to create virtual hast trees for HTML or SVG
+ *
+ * @param selector Simple CSS selector
+ * @param properties Map of properties
+ * @param children (Lists of) child nodes
+ */
+declare function hastscript(
+  selector?: string,
+  properties?: Properties,
+  children?: string | Node | Array<string | Node>
+): Element
+
+export = hastscript

types/tsconfig.json

@@ -0,0 +1,10 @@
+{
+  "compilerOptions": {
+    "lib": ["es2015"],
+    "strict": true,
+    "baseUrl": ".",
+    "paths": {
+      "hastscript": ["index.d.ts"]
+    }
+  }
+}

types/tslint.json

@@ -0,0 +1,7 @@
+{
+  "extends": "dtslint/dtslint.json",
+  "rules": {
+    "semicolon": false,
+    "whitespace": false
+  }
+}