better type building, also clean old definitions

Author: cellog

package.json

@@ -35,7 +35,7 @@
     "types"
   ],
   "scripts": {
-    "clean": "rimraf lib dist es coverage",
+    "clean": "rimraf lib dist es coverage types",
     "format": "prettier --write \"{src,test}/**/*.{js,ts}\" index.d.ts \"**/*.md\"",
     "format:check": "prettier --list-different \"{src,test}/**/*.{js,ts}\" index.d.ts \"**/*.md\"",
     "lint": "eslint --ext js,ts src test",
@@ -44,8 +44,9 @@
     "test:watch": "npm test -- --watch",
     "test:cov": "npm test -- --coverage",
     "build": "npm run build-types && rollup -c",
-    "prepare": "npm run clean && npm run format:check && npm run lint && npm test",
-    "build-types": "tsc",
+    "prepare": "npm run clean && npm run check-types && npm run format:check && npm run lint && npm test",
+    "build-types": "tsc --emitDeclarationOnly",
+    "check-types": "tsc --noEmit",
     "examples:lint": "eslint --ext js,ts examples",
     "examples:test": "cross-env CI=true babel-node examples/testAll.js"
   },

tsconfig.json

@@ -13,13 +13,14 @@
     "declaration": true /* Generates corresponding '.d.ts' file. */,
     "declarationMap": true /* Generates a sourcemap for each corresponding '.d.ts' file. */,
     "declarationDir": "./types" /* Output directory for generated declaration files. */,
+    // "emitDeclarationOnly": true /* Only emit ‘.d.ts’ declaration files. */,
     "sourceMap": true /* Generates corresponding '.map' file. */,
     // "outFile": "./",                       /* Concatenate and emit output to single file. */
     // "outDir": "./types" /* Redirect output structure to the directory. */,
     // "rootDir": "./",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
     // "composite": true,                     /* Enable project compilation */
     "removeComments": false /* Do not emit comments to output. */,
-    "noEmit": true /* Do not emit outputs. */,
+    // "noEmit": true /* Do not emit outputs. */,
     // "importHelpers": true,                 /* Import emit helpers from 'tslib'. */
     // "downlevelIteration": true,            /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
     // "isolatedModules": true /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */,