build(dts-minify): minify the type declaration files(.d.ts)

Use dts-minify package to minify the type declaration files(.d.ts) to optimize the package size

Signed-off-by: Niloy Sikdar <[email protected]>

Author: niloysikdar

build.js

@@ -1,5 +1,9 @@
-// eslint-disable-next-line @typescript-eslint/no-var-requires
+/* eslint-disable @typescript-eslint/no-var-requires */
 const esbuild = require('esbuild');
+const { createMinifier } = require('dts-minify');
+const ts = require('typescript');
+const path = require('path');
+const fs = require('fs');
 
 // Build for ESM
 esbuild
@@ -30,3 +34,19 @@ esbuild
     format: 'cjs',
   })
   .catch(() => process.exit(1));
+
+// Minify types files
+const minifier = createMinifier(ts);
+
+// load .d.ts files from /dist/types
+const files = fs.readdirSync(path.resolve(__dirname, 'dist/types'));
+
+files.forEach((file) => {
+  const filePath = path.resolve(__dirname, 'dist/types', file);
+  const fileContent = fs.readFileSync(filePath, 'utf-8');
+
+  const minified = minifier.minify(fileContent, { keepJsDocs: true });
+
+  // write minified content to the same file
+  fs.writeFileSync(filePath, minified);
+});

package.json

@@ -61,6 +61,7 @@
     "@typescript-eslint/eslint-plugin": "^5.37.0",
     "@typescript-eslint/parser": "^5.37.0",
     "cz-conventional-changelog": "^3.3.0",
+    "dts-minify": "^0.3.0",
     "esbuild": "^0.15.13",
     "eslint": "^8.23.1",
     "eslint-config-prettier": "^8.5.0",

yarn.lock

@@ -1578,6 +1578,13 @@ dot-prop@^5.1.0:
   dependencies:
     is-obj "^2.0.0"
 
+dts-minify@^0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/dts-minify/-/dts-minify-0.3.0.tgz#fbad948b1ce1ebb65759d393e43b56f30dbf29a7"
+  integrity sha512-785XUyfWCH4e2wJAGwaltdN6xMHsE06HDk3I203WaoOl4kxz6gQrHITDPMkWz6lu0goyTjNdzmG1aMr2ukKi3g==
+  dependencies:
+    tslib "2.3.1"
+
 duplexer2@~0.1.0:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/duplexer2/-/duplexer2-0.1.4.tgz#8b12dab878c0d69e3e7891051662a32fc6bddcc1"
@@ -4619,6 +4626,11 @@ ts-node@^10.8.1:
     v8-compile-cache-lib "^3.0.1"
     yn "3.1.1"
 
+[email protected]:
+  version "2.3.1"
+  resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.3.1.tgz#e8a335add5ceae51aa261d32a490158ef042ef01"
+  integrity sha512-77EbyPPpMz+FRFRuAFlWMtmgUWGe9UOG2Z25NqCwiIjRhOf5iKGuzSe5P2w1laq+FkRy4p+PCuVkJSGkzTEKVw==
+
 tslib@^1.8.1:
   version "1.14.1"
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.14.1.tgz#cf2d38bdc34a134bcaf1091c41f6619e2f672d00"