Update JavaScript Minify operation to support ES6.

package-lock.json

@@ -1807,7 +1807,8 @@
     "amdefine": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/amdefine/-/amdefine-1.0.1.tgz",
-      "integrity": "sha1-SlKCrBZHKek2Gbz9OtFR+BfOkfU="
+      "integrity": "sha1-SlKCrBZHKek2Gbz9OtFR+BfOkfU=",
+      "dev": true
     },
     "ansi-colors": {
       "version": "3.2.4",
@@ -2809,8 +2810,7 @@
     "buffer-from": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/buffer-from/-/buffer-from-1.1.1.tgz",
-      "integrity": "sha512-MQcXEUbCKtEo7bhqEs6560Hyd4XaovZlO/k9V3hjVUF/zwW7KBVdSK4gIt/bzwS9MbR5qob+F5jusZsb0YQK2A==",
+      "integrity": "sha512-MQcXEUbCKtEo7bhqEs6560Hyd4XaovZlO/k9V3hjVUF/zwW7KBVdSK4gIt/bzwS9MbR5qob+F5jusZsb0YQK2A=="
-      "dev": true
     },
     "buffer-indexof": {
       "version": "1.1.1",
@@ -4923,21 +4923,6 @@
         }
       }
     },
-    "escope": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/escope/-/escope-1.0.3.tgz",
-      "integrity": "sha1-dZ3OhJbEJI/sLQyq9BCLzz8af10=",
-      "requires": {
-        "estraverse": "^2.0.0"
-      },
-      "dependencies": {
-        "estraverse": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/estraverse/-/estraverse-2.0.0.tgz",
-          "integrity": "sha1-WuRpYyQ2ACBmdMyySgnhZnT83KE="
-        }
-      }
-    },
     "eslint": {
       "version": "6.2.2",
       "resolved": "https://registry.npmjs.org/eslint/-/eslint-6.2.2.tgz",
@@ -5110,89 +5095,6 @@
       "resolved": "https://registry.npmjs.org/esm/-/esm-3.2.25.tgz",
       "integrity": "sha512-U1suiZ2oDVWv4zPO56S0NcR5QriEahGtdN2OR6FiOG4WJvcjBVFB0qI4+eKoWFH483PKGuLuu6V8Z4T5g63UVA=="
     },
-    "esmangle": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/esmangle/-/esmangle-1.0.1.tgz",
-      "integrity": "sha1-2bs3uPjq+/Tm1O1reqKVarvTxMI=",
-      "requires": {
-        "escodegen": "~1.3.2",
-        "escope": "~1.0.1",
-        "esprima": "~1.1.1",
-        "esshorten": "~1.1.0",
-        "estraverse": "~1.5.0",
-        "esutils": "~ 1.0.0",
-        "optionator": "~0.3.0",
-        "source-map": "~0.1.33"
-      },
-      "dependencies": {
-        "escodegen": {
-          "version": "1.3.3",
-          "resolved": "https://registry.npmjs.org/escodegen/-/escodegen-1.3.3.tgz",
-          "integrity": "sha1-8CQBb1qI4Eb9EgBQVek5gC5sXyM=",
-          "requires": {
-            "esprima": "~1.1.1",
-            "estraverse": "~1.5.0",
-            "esutils": "~1.0.0",
-            "source-map": "~0.1.33"
-          }
-        },
-        "esprima": {
-          "version": "1.1.1",
-          "resolved": "https://registry.npmjs.org/esprima/-/esprima-1.1.1.tgz",
-          "integrity": "sha1-W28VR/TRAuZw4UDFCb5ncdautUk="
-        },
-        "estraverse": {
-          "version": "1.5.1",
-          "resolved": "https://registry.npmjs.org/estraverse/-/estraverse-1.5.1.tgz",
-          "integrity": "sha1-hno+jlip+EYYr7bC3bzZFrfLr3E="
-        },
-        "esutils": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/esutils/-/esutils-1.0.0.tgz",
-          "integrity": "sha1-gVHTWOIMisx/t0XnRywAJf5JZXA="
-        },
-        "fast-levenshtein": {
-          "version": "1.0.7",
-          "resolved": "https://registry.npmjs.org/fast-levenshtein/-/fast-levenshtein-1.0.7.tgz",
-          "integrity": "sha1-AXjc3uAjuSkFGTrwlZ6KdjnP3Lk="
-        },
-        "levn": {
-          "version": "0.2.5",
-          "resolved": "https://registry.npmjs.org/levn/-/levn-0.2.5.tgz",
-          "integrity": "sha1-uo0znQykphDjo/FFucr0iAcVUFQ=",
-          "requires": {
-            "prelude-ls": "~1.1.0",
-            "type-check": "~0.3.1"
-          }
-        },
-        "optionator": {
-          "version": "0.3.0",
-          "resolved": "https://registry.npmjs.org/optionator/-/optionator-0.3.0.tgz",
-          "integrity": "sha1-lxWotfXnWGz/BsgkngOc1zZNP1Q=",
-          "requires": {
-            "deep-is": "~0.1.2",
-            "fast-levenshtein": "~1.0.0",
-            "levn": "~0.2.4",
-            "prelude-ls": "~1.1.0",
-            "type-check": "~0.3.1",
-            "wordwrap": "~0.0.2"
-          }
-        },
-        "source-map": {
-          "version": "0.1.43",
-          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.1.43.tgz",
-          "integrity": "sha1-wkvBRspRfBRx9drL4lcbK3+eM0Y=",
-          "requires": {
-            "amdefine": ">=0.0.4"
-          }
-        },
-        "wordwrap": {
-          "version": "0.0.3",
-          "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.3.tgz",
-          "integrity": "sha1-o9XabNXAvAAI03I0u68b7WMFkQc="
-        }
-      }
-    },
     "espree": {
       "version": "6.1.1",
       "resolved": "https://registry.npmjs.org/espree/-/espree-6.1.1.tgz",
@@ -5235,23 +5137,6 @@
         "estraverse": "^4.1.0"
       }
     },
-    "esshorten": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/esshorten/-/esshorten-1.1.1.tgz",
-      "integrity": "sha1-F0+Wt8wmfkaHLYFOfbfCkL3/Yak=",
-      "requires": {
-        "escope": "~1.0.1",
-        "estraverse": "~4.1.1",
-        "esutils": "~2.0.2"
-      },
-      "dependencies": {
-        "estraverse": {
-          "version": "4.1.1",
-          "resolved": "https://registry.npmjs.org/estraverse/-/estraverse-4.1.1.tgz",
-          "integrity": "sha1-9srKcokzqFDvkGYdDheYK6RxEaI="
-        }
-      }
-    },
     "estraverse": {
       "version": "4.2.0",
       "resolved": "https://registry.npmjs.org/estraverse/-/estraverse-4.2.0.tgz",
@@ -12156,10 +12041,9 @@
       }
     },
     "source-map-support": {
-      "version": "0.5.13",
+      "version": "0.5.16",
-      "resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.13.tgz",
+      "resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.16.tgz",
-      "integrity": "sha512-SHSKFHadjVA5oR4PPqhtAVdcBWwRYVd6g6cAXnIbRiIwc2EhPrTuKUBdSLvlEKyIP3GCf89fltvcZiP9MMFA1w==",
+      "integrity": "sha512-efyLRJDr68D9hBBNIPWFjhpFzURh+KJykQwvMyW5UiZzYwoF6l4YMMDIJJEyFWxWCqfyxLzz6tSfUFR+kXXsVQ==",
-      "dev": true,
       "requires": {
         "buffer-from": "^1.0.0",
         "source-map": "^0.6.0"
@@ -12809,10 +12693,9 @@
       }
     },
     "terser": {
-      "version": "4.2.1",
+      "version": "4.3.9",
-      "resolved": "https://registry.npmjs.org/terser/-/terser-4.2.1.tgz",
+      "resolved": "https://registry.npmjs.org/terser/-/terser-4.3.9.tgz",
-      "integrity": "sha512-cGbc5utAcX4a9+2GGVX4DsenG6v0x3glnDi5hx8816X1McEAwPlPgRtXPJzSBsbpILxZ8MQMT0KvArLuE0HP5A==",
+      "integrity": "sha512-NFGMpHjlzmyOtPL+fDw3G7+6Ueh/sz4mkaUYa4lJCxOPTNzd0Uj0aZJOmsDYoSQyfuVoWDMSWTPU3huyOm2zdA==",
-      "dev": true,
       "requires": {
         "commander": "^2.20.0",
         "source-map": "~0.6.1",

package.json

@@ -106,7 +106,6 @@
     "es6-promisify": "^6.0.2",
     "escodegen": "^1.12.0",
     "esm": "^3.2.25",
-    "esmangle": "^1.0.1",
     "esprima": "^4.0.1",
     "exif-parser": "^0.1.12",
     "file-saver": "^2.0.2",
@@ -144,6 +143,7 @@
     "sortablejs": "^1.9.0",
     "split.js": "^1.5.11",
     "ssdeep.js": "0.0.2",
+    "terser": "^4.3.9",
     "tesseract.js": "^2.0.0-alpha.15",
     "ua-parser-js": "^0.7.20",
     "utf8": "^3.0.0",

src/core/operations/JavaScriptMinify.mjs

@@ -4,10 +4,9 @@
  * @license Apache-2.0
  */
 
+import OperationError from "../errors/OperationError.mjs";
 import Operation from "../Operation.mjs";
-import * as esprima from "esprima";
+import Terser from "terser";
-import escodegen from "escodegen";
-import esmangle from "esmangle";
 
 /**
  * JavaScript Minify operation
@@ -34,22 +33,11 @@ class JavaScriptMinify extends Operation {
      * @returns {string}
      */
     run(input, args) {
-        let result = "";
+        const result = Terser.minify(input);
-        const AST = esprima.parseScript(input),
+        if (result.error) {
-            optimisedAST = esmangle.optimize(AST, null),
+            throw new OperationError(`Error minifying JavaScript. (${result.error})`);
-            mangledAST = esmangle.mangle(optimisedAST);
+        }
-
+        return result.code;
-        result = escodegen.generate(mangledAST, {
-            format: {
-                renumber:    true,
-                hexadecimal: true,
-                escapeless:  true,
-                compact:     true,
-                semicolons:  false,
-                parentheses: false
-            }
-        });
-        return result;
     }
 
 }