Replace zlib.js and pako with fflate (#3054)

Co-authored-by: Lukas Hollaender <lukas.hollaender@yworks.com>

bower.json

@@ -14,7 +14,7 @@
   "moduleType": ["amd", "globals", "node", "es6"],
   "keywords": ["pdf"],
   "dependencies": {
-    "pako": "^1.0.11"
+    "fflate": "101arrowz/fflate#^0.4.8"
   },
   "optionalDependencies": {
     "canvg": "^3.0.6",
@@ -65,7 +65,6 @@
     "regenerator-runtime": "^0.13.5",
     "requirejs": "^2.3.6",
     "rollup": "^2.18.2",
-    "rollup-plugin-commonjs": "^10.1.0",
     "rollup-plugin-license": "^2.1.0",
     "rollup-plugin-node-resolve": "4.2.3",
     "rollup-plugin-preprocess": "0.0.4",

modules.conf.js

@@ -17,14 +17,7 @@ var configuration = {
     name: "Core",
     folder: "",
     description: "",
-    deps: ["license", "adler32cs", "rgbcolor"]
-  },
-
-  adler32cs: {
-    name: "Adler32",
-    folder: "libs",
-    description: "Adler32",
-    deps: []
+    deps: ["license", "rgbcolor"]
   },
 
   rgbcolor: {

package.json

@@ -25,7 +25,7 @@
   "dependencies": {
     "atob": "^2.1.2",
     "btoa": "^1.2.1",
-    "pako": "^1.0.11"
+    "fflate": "^0.4.8"
   },
   "optionalDependencies": {
     "canvg": "^3.0.6",

rollup.config.js

@@ -92,7 +92,6 @@ const es = {
   external: externals,
   plugins: [
     resolve(),
-    commonjs(),
     RollupPluginPreprocess({ context: { MODULE_FORMAT: "es" } }),
     replaceVersion(),
     licenseBanner()
@@ -121,7 +120,6 @@ const node = {
   external: externals,
   plugins: [
     resolve(),
-    commonjs(),
     RollupPluginPreprocess({ context: { MODULE_FORMAT: "cjs" } }),
     replaceVersion(),
     licenseBanner()

src/index.js

@@ -32,6 +32,5 @@ import "./modules/vfs.js";
 
 import "./libs/bidiEngine.js";
 import "./libs/ttffont.js";
-import "./libs/adler32cs.js";
 
 export default jsPDF;

src/libs/fflate.js

@@ -0,0 +1,2 @@
+// Tree shaking reduces bundle size
+export { zlibSync, unzlibSync } from "fflate";