base64-arraybuffer-es6 - npm Package Compare versions

Comparing version 1.0.0 to 2.0.0

dist/base64-arraybuffer-es.js

@@ -5,12 +5,18 @@ /*
  *
- * Copyright (c) 2017 Brett Zamir, 2012 Niklas von Hertzen
+ * Copyright (c) 2017-2023 Brett Zamir, 2012 Niklas von Hertzen
  * Licensed under the MIT license.
  */
-var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'; // Use a lookup table to find the index.
 
+/**
+ * @typedef {number} Integer
+ */
+
+var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
+
+// Use a lookup table to find the index.
 var lookup = new Uint8Array(256);
-
 for (var i = 0; i < chars.length; i++) {
-  lookup[chars.codePointAt(i)] = i;
+  lookup[/** @type {number} */chars.codePointAt(i)] = i;
 }
+
 /**
@@ -22,4 +28,2 @@ * @param {ArrayBuffer} arraybuffer
  */
-
-
 var encode = function encode(arraybuffer, byteOffset, lngth) {
@@ -30,7 +34,7 @@ if (lngth === null || lngth === undefined) {
 
-  var bytes = new Uint8Array(arraybuffer, byteOffset || 0, // Default needed for Safari
+  var bytes = new Uint8Array(arraybuffer, byteOffset || 0,
+  // Default needed for Safari
   lngth);
   var len = bytes.length;
   var base64 = '';
-
   for (var _i = 0; _i < len; _i += 3) {
@@ -42,3 +46,2 @@ base64 += chars[bytes[_i] >> 2];
   }
-
   if (len % 3 === 2) {
@@ -49,5 +52,5 @@ base64 = base64.slice(0, -1) + '=';
   }
-
   return base64;
 };
+
 /**
@@ -57,12 +60,12 @@ * @param {string} base64
  */
-
 var decode = function decode(base64) {
   var len = base64.length;
+  if (len % 4) {
+    throw new Error('Bad base64 length: not divisible by four');
+  }
   var bufferLength = base64.length * 0.75;
   var p = 0;
   var encoded1, encoded2, encoded3, encoded4;
-
   if (base64[base64.length - 1] === '=') {
     bufferLength--;
-
     if (base64[base64.length - 2] === '=') {
@@ -72,11 +75,11 @@ bufferLength--;
   }
-
   var arraybuffer = new ArrayBuffer(bufferLength),
-      bytes = new Uint8Array(arraybuffer);
-
+    bytes = new Uint8Array(arraybuffer);
   for (var _i2 = 0; _i2 < len; _i2 += 4) {
-    encoded1 = lookup[base64.codePointAt(_i2)];
-    encoded2 = lookup[base64.codePointAt(_i2 + 1)];
-    encoded3 = lookup[base64.codePointAt(_i2 + 2)];
-    encoded4 = lookup[base64.codePointAt(_i2 + 3)];
+    // We know the result will not be undefined, as we have a text
+    //   length divisible by four
+    encoded1 = lookup[/** @type {number} */base64.codePointAt(_i2)];
+    encoded2 = lookup[/** @type {number} */base64.codePointAt(_i2 + 1)];
+    encoded3 = lookup[/** @type {number} */base64.codePointAt(_i2 + 2)];
+    encoded4 = lookup[/** @type {number} */base64.codePointAt(_i2 + 3)];
     bytes[p++] = encoded1 << 2 | encoded2 >> 4;
@@ -86,3 +89,2 @@ bytes[p++] = (encoded2 & 15) << 4 | encoded3 >> 2;
   }
-
   return arraybuffer;
@@ -89,0 +91,0 @@ };

package.json

 {
   "name": "base64-arraybuffer-es6",
-  "version": "1.0.0",
+  "version": "2.0.0",
   "description": "Encode/decode base64 data into ArrayBuffers",
@@ -8,2 +8,3 @@ "homepage": "https://github.com/brettz9/base64-arraybuffer",
   "type": "module",
+  "types": "./dist/base64-arraybuffer.d.ts",
   "contributors": [
@@ -40,30 +41,29 @@ {
   "devDependencies": {
-    "@babel/core": "^7.17.4",
-    "@babel/preset-env": "^7.16.11",
+    "@babel/core": "^7.21.4",
+    "@babel/preset-env": "^7.21.4",
     "@brettz9/eslint-plugin": "^1.0.4",
-    "@rollup/plugin-babel": "^5.3.0",
-    "c8": "^7.11.0",
-    "chai": "^4.3.6",
-    "eslint": "^8.9.0",
-    "eslint-config-ash-nazg": "^32.4.0",
-    "eslint-config-standard": "^16.0.3",
-    "eslint-plugin-array-func": "^3.1.7",
-    "eslint-plugin-compat": "^4.0.2",
+    "@rollup/plugin-babel": "^6.0.3",
+    "c8": "^7.13.0",
+    "chai": "^4.3.7",
+    "eslint": "^8.39.0",
+    "eslint-config-ash-nazg": "^34.11.1",
+    "eslint-config-standard": "^17.0.0",
+    "eslint-plugin-array-func": "^3.1.8",
+    "eslint-plugin-compat": "^4.1.4",
     "eslint-plugin-eslint-comments": "^3.2.0",
-    "eslint-plugin-html": "^6.2.0",
-    "eslint-plugin-import": "^2.25.4",
-    "eslint-plugin-jsdoc": "^37.9.2",
-    "eslint-plugin-markdown": "^2.2.1",
-    "eslint-plugin-no-unsanitized": "^4.0.1",
+    "eslint-plugin-html": "^7.1.0",
+    "eslint-plugin-import": "^2.27.5",
+    "eslint-plugin-jsdoc": "^43.1.1",
+    "eslint-plugin-markdown": "^3.0.0",
+    "eslint-plugin-no-unsanitized": "^4.0.2",
     "eslint-plugin-no-use-extend-native": "^0.5.0",
     "eslint-plugin-node": "^11.1.0",
-    "eslint-plugin-promise": "^6.0.0",
-    "eslint-plugin-sonarjs": "^0.11.0",
+    "eslint-plugin-promise": "^6.1.1",
+    "eslint-plugin-sonarjs": "^0.19.0",
     "eslint-plugin-standard": "^4.1.0",
-    "eslint-plugin-unicorn": "^41.0.0",
-    "esm": "^3.2.25",
-    "http-server": "^14.1.0",
-    "mocha": "^9.2.0",
-    "open-cli": "^7.0.1",
-    "rollup": "2.67.2"
+    "eslint-plugin-unicorn": "^46.0.0",
+    "http-server": "^14.1.1",
+    "mocha": "^10.2.0",
+    "open-cli": "^7.2.0",
+    "rollup": "3.21.0"
   },
@@ -75,10 +75,11 @@ "keywords": [
   "scripts": {
+    "tsc": "tsc",
     "start": "http-server -p 8093",
     "eslint": "eslint --ext js,md,html .",
+    "lint": "npm run eslint --",
     "build": "rollup -c",
-    "mocha": "mocha --require esm --require chai/register-assert.js test/*.js",
+    "mocha": "mocha --require chai/register-assert.js test/*.js",
     "test": "npm run eslint && npm run build && c8 npm run mocha",
     "browser-test": "npm run eslint && npm run build && open-cli http://127.0.0.1:8093/test/ && npm start"
-  },
-  "readme": "# base64-arraybuffer-es6\n\nEncode/decode base64 data into ArrayBuffers\n\nAn ES6 Modules-based port of [base64-arraybuffer](https://github.com/niklasvh/base64-arraybuffer).\n\nAlso supports `byteOffset` and `length` arguments for partial encoding and\nallows for selective import of the two methods.\n\n## Getting Started\n\nInstall the module with: `npm install base64-arraybuffer-es6`\n\n## API\n\nThe library encodes and decodes base64 to and from ArrayBuffers\n\n - __encode(buffer, byteOffset, length)__ - Encodes `ArrayBuffer` into base64 string\n - __decode(str)__ - Decodes base64 string to `ArrayBuffer`\n\n## License\n\nCopyright (c) 2017-2019 Brett Zamir, 2012 Niklas von Hertzen\nLicensed under the MIT license.\n"
+  }
 }

src/base64-arraybuffer.js

@@ -5,6 +5,10 @@ /*
  *
- * Copyright (c) 2017 Brett Zamir, 2012 Niklas von Hertzen
+ * Copyright (c) 2017-2023 Brett Zamir, 2012 Niklas von Hertzen
  * Licensed under the MIT license.
  */
 
+/**
+ * @typedef {number} Integer
+ */
+
 const chars =
@@ -16,3 +20,3 @@ 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
 for (let i = 0; i < chars.length; i++) {
-    lookup[chars.codePointAt(i)] = i;
+    lookup[/** @type {number} */ (chars.codePointAt(i))] = i;
 }
@@ -61,2 +65,6 @@
 
+    if (len % 4) {
+        throw new Error('Bad base64 length: not divisible by four');
+    }
+
     let bufferLength = base64.length * 0.75;
@@ -77,6 +85,8 @@ let p = 0;
     for (let i = 0; i < len; i += 4) {
-        encoded1 = lookup[base64.codePointAt(i)];
-        encoded2 = lookup[base64.codePointAt(i + 1)];
-        encoded3 = lookup[base64.codePointAt(i + 2)];
-        encoded4 = lookup[base64.codePointAt(i + 3)];
+        // We know the result will not be undefined, as we have a text
+        //   length divisible by four
+        encoded1 = lookup[/** @type {number} */ (base64.codePointAt(i))];
+        encoded2 = lookup[/** @type {number} */ (base64.codePointAt(i + 1))];
+        encoded3 = lookup[/** @type {number} */ (base64.codePointAt(i + 2))];
+        encoded4 = lookup[/** @type {number} */ (base64.codePointAt(i + 3))];
 
@@ -83,0 +93,0 @@ bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);

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Improved metrics

Total package byte prevSize

13065

increased by5.7%

Dev dependency count

27

decreased by-3.57%

Number of package files

8

increased by33.33%

Lines of code

245

increased by13.43%

Number of medium supply chain risk alerts

0

decreased by-100%

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