output d.ts files (#1037)

* output d.ts files

* package.json - also include src/**/*.ts files

* package.json - also include types/**/*.d.ts files

Author: duaneatat

.gitignore

@@ -1,5 +1,6 @@
 .DS_Store
 dist/
+types/
 node_modules/
 test/output/*-changed.svg
 test/output/*-changed.html

package.json

@@ -23,7 +23,9 @@
   },
   "files": [
     "dist/**/*.js",
-    "src/**/*.js"
+    "src/**/*.js",
+    "src/**/*.ts",
+    "types/**/*.d.ts"
   ],
   "scripts": {
     "test": "yarn test:typecheck && yarn test:lint && yarn readme:check && yarn test:mocha",

src/format.ts

@@ -8,11 +8,11 @@ const numberFormat = memoize1<Intl.NumberFormat>(
 );
 const monthFormat = memoize1<Intl.DateTimeFormat>(
   (locale: string | string[] | undefined, month: "numeric" | "2-digit" | "long" | "short" | "narrow" | undefined) =>
-    new Intl.DateTimeFormat(locale, {timeZone: "UTC", month})
+    new Intl.DateTimeFormat(locale, {timeZone: "UTC", ...(month && {month})})
 );
 const weekdayFormat = memoize1<Intl.DateTimeFormat>(
   (locale: string | string[] | undefined, weekday: "long" | "short" | "narrow" | undefined) =>
-    new Intl.DateTimeFormat(locale, {timeZone: "UTC", weekday})
+    new Intl.DateTimeFormat(locale, {timeZone: "UTC", ...(weekday && {weekday})})
 );
 
 export function formatNumber(locale = "en-US"): (value: any) => string | undefined {

tsconfig.json

@@ -7,6 +7,8 @@
     "stripInternal": true,
     "outDir": "dist",
     "allowJs": true,
+    "declaration": true,
+    "declarationDir": "types",
     "resolveJsonModule": true,
     "moduleResolution": "node",
     "paths": {