diff --git a/.eslintignore b/.eslintignore
new file mode 100644
index 0000000..9e368c2
--- /dev/null
+++ b/.eslintignore
@@ -0,0 +1,3 @@
+dist/
+test/expected.js
+test/original.js
diff --git a/package-lock.json b/package-lock.json
index cfdf587..9042028 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,17 +9,15 @@
       "version": "0.6.0",
       "license": "Beerware",
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-        "@javascript-obfuscator/escodegen": "^2.3.0",
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-        "acorn": "^8.8.0",
-        "convert-source-map": "^1.8.0",
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       },
       "devDependencies": {
         "eslint": "^8.21.0",
         "eslint-config-mourner": "^3.0.0",
         "rollup": "^2.77.3",
+        "rollup-plugin-cleanup": "^3.2.1",
+        "rollup-plugin-copy": "^3.4.0",
         "tape": "^5.5.3"
       }
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@@ -73,31 +71,6 @@
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       "dev": true
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-    "node_modules/@javascript-obfuscator/escodegen": {
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-      "resolved": "https://registry.npmjs.org/@javascript-obfuscator/escodegen/-/escodegen-2.3.0.tgz",
-      "integrity": "sha512-QVXwMIKqYMl3KwtTirYIA6gOCiJ0ZDtptXqAv/8KWLG9uQU2fZqTVy7a/A5RvcoZhbDoFfveTxuGxJ5ibzQtkw==",
-      "dependencies": {
-        "@javascript-obfuscator/estraverse": "^5.3.0",
-        "esprima": "^4.0.1",
-        "esutils": "^2.0.2",
-        "optionator": "^0.8.1"
-      },
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-      },
-      "optionalDependencies": {
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-    "node_modules/@javascript-obfuscator/estraverse": {
-      "version": "5.4.0",
-      "resolved": "https://registry.npmjs.org/@javascript-obfuscator/estraverse/-/estraverse-5.4.0.tgz",
-      "integrity": "sha512-CZFX7UZVN9VopGbjTx4UXaXsi9ewoM1buL0kY7j1ftYdSs7p2spv9opxFjHlQ/QGTgh4UqufYqJJ0WKLml7b6w==",
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@@ -145,10 +118,42 @@
         "node": ">= 8.0.0"
       }
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+    "node_modules/@types/fs-extra": {
+      "version": "8.1.2",
+      "resolved": "https://registry.npmjs.org/@types/fs-extra/-/fs-extra-8.1.2.tgz",
+      "integrity": "sha512-SvSrYXfWSc7R4eqnOzbQF4TZmfpNSM9FrSWLU3EUnWBuyZqNBOrv1B1JA3byUDPUl9z4Ab3jeZG2eDdySlgNMg==",
+      "dev": true,
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
+    "node_modules/@types/glob": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/@types/glob/-/glob-7.2.0.tgz",
+      "integrity": "sha512-ZUxbzKl0IfJILTS6t7ip5fQQM/J3TJYubDm3nMbgubNNYS62eXeUpoLUC8/7fJNiFYHTrGPQn7hspDUzIHX3UA==",
+      "dev": true,
+      "dependencies": {
+        "@types/minimatch": "*",
+        "@types/node": "*"
+      }
+    },
+    "node_modules/@types/minimatch": {
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/@types/minimatch/-/minimatch-5.1.2.tgz",
+      "integrity": "sha512-K0VQKziLUWkVKiRVrx4a40iPaxTUefQmjtkQofBkYRcoaaL/8rhwDWww9qWbrgicNOgnpIsMxyNIUM4+n6dUIA==",
+      "dev": true
+    },
+    "node_modules/@types/node": {
+      "version": "20.3.1",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-20.3.1.tgz",
+      "integrity": "sha512-EhcH/wvidPy1WeML3TtYFGR83UzjxeWRen9V402T8aUGYsCHOmfoisV3ZSg03gAFIbLq8TnWOJ0f4cALtnSEUg==",
+      "dev": true
+    },
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       "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.8.0.tgz",
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+      "dev": true,
       "bin": {
         "acorn": "bin/acorn"
       },
@@ -181,14 +186,6 @@
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-      "resolved": "https://registry.npmjs.org/amdefine/-/amdefine-1.0.1.tgz",
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-      "engines": {
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@@ -342,20 +339,18 @@
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       "dev": true
     },
+    "node_modules/colorette": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/colorette/-/colorette-1.4.0.tgz",
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+      "dev": true
+    },
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-    "node_modules/convert-source-map": {
-      "version": "1.8.0",
-      "resolved": "https://registry.npmjs.org/convert-source-map/-/convert-source-map-1.8.0.tgz",
-      "integrity": "sha512-+OQdjP49zViI/6i7nIJpA8rAl4sV/JdPfU9nZs3VqOwGIgizICvuN2ru6fMd+4llL0tar18UYJXfZ/TWtmhUjA==",
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@@ -416,7 +411,8 @@
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+      "integrity": "sha512-oIPzksmTg4/MriiaYGO+okXDT7ztn/w3Eptv/+gSIdMdKsJo0u4CfYNFJPy+4SKMuCqGw2wxnA+URMg3t8a/bQ==",
+      "dev": true
     },
     "node_modules/define-properties": {
       "version": "1.1.4",
@@ -706,18 +702,6 @@
         "url": "https://opencollective.com/eslint"
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-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/esprima/-/esprima-4.0.1.tgz",
-      "integrity": "sha512-eGuFFw7Upda+g4p+QHvnW0RyTX/SVeJBDM/gCtMARO0cLuT2HcEKnTPvhjV6aGeqrCB/sbNop0Kszm0jsaWU4A==",
-      "bin": {
-        "esparse": "bin/esparse.js",
-        "esvalidate": "bin/esvalidate.js"
-      },
-      "engines": {
-        "node": ">=4"
-      }
-    },
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       "resolved": "https://registry.npmjs.org/esquery/-/esquery-1.4.0.tgz",
@@ -759,6 +743,7 @@
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+      "dev": true,
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@@ -806,7 +791,8 @@
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+      "integrity": "sha512-DCXu6Ifhqcks7TZKY3Hxp3y6qphY5SJZmrWMDrKcERSOXWQdMhU9Ig/PYrzyw/ul9jOIyh0N4M0tbC5hodg8dw==",
+      "dev": true
     },
     "node_modules/fastq": {
       "version": "1.13.0",
@@ -885,6 +871,20 @@
         "is-callable": "^1.1.3"
       }
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+    "node_modules/fs-extra": {
+      "version": "8.1.0",
+      "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-8.1.0.tgz",
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+      "dev": true,
+      "dependencies": {
+        "graceful-fs": "^4.2.0",
+        "jsonfile": "^4.0.0",
+        "universalify": "^0.1.0"
+      },
+      "engines": {
+        "node": ">=6 <7 || >=8"
+      }
+    },
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@@ -1050,6 +1050,12 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/graceful-fs": {
+      "version": "4.2.11",
+      "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.11.tgz",
+      "integrity": "sha512-RbJ5/jmFcNNCcDV5o9eTnBLJ/HszWV0P73bc+Ff4nS/rJj+YaS6IGyiOL0VoBYX+l1Wrl3k63h/KrH+nhJ0XvQ==",
+      "dev": true
+    },
     "node_modules/grapheme-splitter": {
       "version": "1.0.4",
       "resolved": "https://registry.npmjs.org/grapheme-splitter/-/grapheme-splitter-1.0.4.tgz",
@@ -1351,6 +1357,15 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/is-plain-object": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/is-plain-object/-/is-plain-object-3.0.1.tgz",
+      "integrity": "sha512-Xnpx182SBMrr/aBik8y+GuR4U1L9FqMSojwDQwPMmxyC6bvEqly9UBCxhauBF5vNh2gwWJNX6oDV7O+OM4z34g==",
+      "dev": true,
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
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@@ -1483,6 +1498,20 @@
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       "dev": true
     },
+    "node_modules/js-cleanup": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/js-cleanup/-/js-cleanup-1.2.0.tgz",
+      "integrity": "sha512-JeDD0yiiSt80fXzAVa/crrS0JDPQljyBG/RpOtaSbyDq03VHa9szJWMaWOYU/bcTn412uMN2MxApXq8v79cUiQ==",
+      "dev": true,
+      "dependencies": {
+        "magic-string": "^0.25.7",
+        "perf-regexes": "^1.0.1",
+        "skip-regex": "^1.0.2"
+      },
+      "engines": {
+        "node": "^10.14.2 || >=12.0.0"
+      }
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       "dev": true
     },
+    "node_modules/jsonfile": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-4.0.0.tgz",
+      "integrity": "sha512-m6F1R3z8jjlf2imQHS2Qez5sjKWQzbuuhuJ/FKYFRZvPE3PuHcSMVZzfsLhGVOkfd20obL5SWEBew5ShlquNxg==",
+      "dev": true,
+      "optionalDependencies": {
+        "graceful-fs": "^4.1.6"
+      }
+    },
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@@ -1541,6 +1579,15 @@
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       "dev": true
     },
+    "node_modules/magic-string": {
+      "version": "0.25.9",
+      "resolved": "https://registry.npmjs.org/magic-string/-/magic-string-0.25.9.tgz",
+      "integrity": "sha512-RmF0AsMzgt25qzqqLc1+MbHmhdx0ojF2Fvs4XnOqz2ZOBXzzkEwc/dJQZCYHAn7v1jbVOjAZfK8msRn4BxO4VQ==",
+      "dev": true,
+      "dependencies": {
+        "sourcemap-codec": "^1.4.8"
+      }
+    },
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-      "resolved": "https://registry.npmjs.org/multi-stage-sourcemap/-/multi-stage-sourcemap-0.3.1.tgz",
-      "integrity": "sha512-UiTLYjqeIoVnJHyWGskwMKIhtZKK9uXUjSTWuwatarrc0d2H/6MAVFdwvEA/aKOHamIn7z4tfvxjz+FYucFpNQ==",
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-      }
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-    "node_modules/multi-stage-sourcemap/node_modules/source-map": {
-      "version": "0.1.43",
-      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.1.43.tgz",
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@@ -1673,53 +1701,6 @@
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-      "resolved": "https://registry.npmjs.org/optionator/-/optionator-0.8.3.tgz",
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-        "fast-levenshtein": "~2.0.6",
-        "levn": "~0.3.0",
-        "prelude-ls": "~1.1.2",
-        "type-check": "~0.3.2",
-        "word-wrap": "~1.2.3"
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-      "resolved": "https://registry.npmjs.org/prelude-ls/-/prelude-ls-1.1.2.tgz",
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-      "version": "0.3.2",
-      "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.3.2.tgz",
-      "integrity": "sha512-ZCmOJdvOWDBYJlzAoFkC+Q0+bUyEOS1ltgp1MGU03fqHG+dbi9tBFU2Rd9QKiDZFAYrhPh2JUf7rZRIuHRKtOg==",
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@@ -1804,6 +1785,15 @@
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+    "node_modules/perf-regexes": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/perf-regexes/-/perf-regexes-1.0.1.tgz",
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+      "dev": true,
+      "engines": {
+        "node": ">=6.14"
+      }
+    },
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       "version": "2.3.1",
       "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.3.1.tgz",
@@ -1957,6 +1947,72 @@
         "fsevents": "~2.3.2"
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+    "node_modules/rollup-plugin-cleanup": {
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/rollup-plugin-cleanup/-/rollup-plugin-cleanup-3.2.1.tgz",
+      "integrity": "sha512-zuv8EhoO3TpnrU8MX8W7YxSbO4gmOR0ny06Lm3nkFfq0IVKdBUtHwhVzY1OAJyNCIAdLiyPnOrU0KnO0Fri1GQ==",
+      "dev": true,
+      "dependencies": {
+        "js-cleanup": "^1.2.0",
+        "rollup-pluginutils": "^2.8.2"
+      },
+      "engines": {
+        "node": "^10.14.2 || >=12.0.0"
+      },
+      "peerDependencies": {
+        "rollup": ">=2.0"
+      }
+    },
+    "node_modules/rollup-plugin-copy": {
+      "version": "3.4.0",
+      "resolved": "https://registry.npmjs.org/rollup-plugin-copy/-/rollup-plugin-copy-3.4.0.tgz",
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+      "dev": true,
+      "dependencies": {
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-        "deep-is": "~0.1.3",
-        "fast-levenshtein": "~2.0.6",
-        "levn": "~0.3.0",
-        "prelude-ls": "~1.1.2",
-        "type-check": "~0.3.2",
-        "word-wrap": "~1.2.3"
-      },
-      "dependencies": {
-        "levn": {
-          "version": "0.3.0",
-          "resolved": "https://registry.npmjs.org/levn/-/levn-0.3.0.tgz",
-          "integrity": "sha512-0OO4y2iOHix2W6ujICbKIaEQXvFQHue65vUG3pb5EUomzPI90z9hsA1VsO/dbIIpC53J8gxM9Q4Oho0jrCM/yA==",
-          "requires": {
-            "prelude-ls": "~1.1.2",
-            "type-check": "~0.3.2"
-          }
-        },
-        "prelude-ls": {
-          "version": "1.1.2",
-          "resolved": "https://registry.npmjs.org/prelude-ls/-/prelude-ls-1.1.2.tgz",
-          "integrity": "sha512-ESF23V4SKG6lVSGZgYNpbsiaAkdab6ZgOxe52p7+Kid3W3u3bxR4Vfd/o21dmN7jSt0IwgZ4v5MUd26FEtXE9w=="
-        },
-        "type-check": {
-          "version": "0.3.2",
-          "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.3.2.tgz",
-          "integrity": "sha512-ZCmOJdvOWDBYJlzAoFkC+Q0+bUyEOS1ltgp1MGU03fqHG+dbi9tBFU2Rd9QKiDZFAYrhPh2JUf7rZRIuHRKtOg==",
-          "requires": {
-            "prelude-ls": "~1.1.2"
-          }
-        }
-      }
-    },
     "p-limit": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-3.1.0.tgz",
@@ -3656,6 +3727,12 @@
       "integrity": "sha512-gDKb8aZMDeD/tZWs9P6+q0J9Mwkdl6xMV8TjnGP3qJVJ06bdMgkbBlLU8IdfOsIsFz2BW1rNVT3XuNEl8zPAvw==",
       "dev": true
     },
+    "perf-regexes": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/perf-regexes/-/perf-regexes-1.0.1.tgz",
+      "integrity": "sha512-L7MXxUDtqr4PUaLFCDCXBfGV/6KLIuSEccizDI7JxT+c9x1G1v04BQ4+4oag84SHaCdrBgQAIs/Cqn+flwFPng==",
+      "dev": true
+    },
     "picomatch": {
       "version": "2.3.1",
       "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.3.1.tgz",
@@ -3746,6 +3823,64 @@
         "fsevents": "~2.3.2"
       }
     },
+    "rollup-plugin-cleanup": {
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/rollup-plugin-cleanup/-/rollup-plugin-cleanup-3.2.1.tgz",
+      "integrity": "sha512-zuv8EhoO3TpnrU8MX8W7YxSbO4gmOR0ny06Lm3nkFfq0IVKdBUtHwhVzY1OAJyNCIAdLiyPnOrU0KnO0Fri1GQ==",
+      "dev": true,
+      "requires": {
+        "js-cleanup": "^1.2.0",
+        "rollup-pluginutils": "^2.8.2"
+      }
+    },
+    "rollup-plugin-copy": {
+      "version": "3.4.0",
+      "resolved": "https://registry.npmjs.org/rollup-plugin-copy/-/rollup-plugin-copy-3.4.0.tgz",
+      "integrity": "sha512-rGUmYYsYsceRJRqLVlE9FivJMxJ7X6jDlP79fmFkL8sJs7VVMSVyA2yfyL+PGyO/vJs4A87hwhgVfz61njI+uQ==",
+      "dev": true,
+      "requires": {
+        "@types/fs-extra": "^8.0.1",
+        "colorette": "^1.1.0",
+        "fs-extra": "^8.1.0",
+        "globby": "10.0.1",
+        "is-plain-object": "^3.0.0"
+      },
+      "dependencies": {
+        "globby": {
+          "version": "10.0.1",
+          "resolved": "https://registry.npmjs.org/globby/-/globby-10.0.1.tgz",
+          "integrity": "sha512-sSs4inE1FB2YQiymcmTv6NWENryABjUNPeWhOvmn4SjtKybglsyPZxFB3U1/+L1bYi0rNZDqCLlHyLYDl1Pq5A==",
+          "dev": true,
+          "requires": {
+            "@types/glob": "^7.1.1",
+            "array-union": "^2.1.0",
+            "dir-glob": "^3.0.1",
+            "fast-glob": "^3.0.3",
+            "glob": "^7.1.3",
+            "ignore": "^5.1.1",
+            "merge2": "^1.2.3",
+            "slash": "^3.0.0"
+          }
+        }
+      }
+    },
+    "rollup-pluginutils": {
+      "version": "2.8.2",
+      "resolved": "https://registry.npmjs.org/rollup-pluginutils/-/rollup-pluginutils-2.8.2.tgz",
+      "integrity": "sha512-EEp9NhnUkwY8aif6bxgovPHMoMoNr2FulJziTndpt5H9RdwC47GSGuII9XxpSdzVGM0GWrNPHV6ie1LTNJPaLQ==",
+      "dev": true,
+      "requires": {
+        "estree-walker": "^0.6.1"
+      },
+      "dependencies": {
+        "estree-walker": {
+          "version": "0.6.1",
+          "resolved": "https://registry.npmjs.org/estree-walker/-/estree-walker-0.6.1.tgz",
+          "integrity": "sha512-SqmZANLWS0mnatqbSfRP5g8OXZC12Fgg1IwNtLsyHDzJizORW4khDfjPqJZsemPWBB2uqykUah5YpQ6epsqC/w==",
+          "dev": true
+        }
+      }
+    },
     "run-parallel": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/run-parallel/-/run-parallel-1.2.0.tgz",
@@ -3755,11 +3890,6 @@
         "queue-microtask": "^1.2.2"
       }
     },
-    "safe-buffer": {
-      "version": "5.1.2",
-      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
-      "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
-    },
     "shebang-command": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-2.0.0.tgz",
@@ -3786,17 +3916,23 @@
         "object-inspect": "^1.9.0"
       }
     },
+    "skip-regex": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/skip-regex/-/skip-regex-1.0.2.tgz",
+      "integrity": "sha512-pEjMUbwJ5Pl/6Vn6FsamXHXItJXSRftcibixDmNCWbWhic0hzHrwkMZo0IZ7fMRH9KxcWDFSkzhccB4285PutA==",
+      "dev": true
+    },
     "slash": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/slash/-/slash-3.0.0.tgz",
       "integrity": "sha512-g9Q1haeby36OSStwb4ntCGGGaKsaVSjQ68fBxoQcutl5fS1vuY18H3wSt3jFyFtrkx+Kz0V1G85A4MyAdDMi2Q==",
       "dev": true
     },
-    "source-map": {
-      "version": "0.6.1",
-      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
-      "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
-      "optional": true
+    "sourcemap-codec": {
+      "version": "1.4.8",
+      "resolved": "https://registry.npmjs.org/sourcemap-codec/-/sourcemap-codec-1.4.8.tgz",
+      "integrity": "sha512-9NykojV5Uih4lgo5So5dtw+f0JgJX30KCNI8gwhz2J9A15wD0Ml6tjHKwf6fTSa6fAdVBdZeNOs9eJ71qCk8vA==",
+      "dev": true
     },
     "string.prototype.trim": {
       "version": "1.2.6",
@@ -3946,6 +4082,12 @@
         "which-boxed-primitive": "^1.0.2"
       }
     },
+    "universalify": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/universalify/-/universalify-0.1.2.tgz",
+      "integrity": "sha512-rBJeI5CXAlmy1pV+617WB9J63U6XcazHHF2f2dbJix4XzpUF0RS3Zbj0FGIOCAva5P/d/GBOYaACQ1w+0azUkg==",
+      "dev": true
+    },
     "uri-js": {
       "version": "4.4.1",
       "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.4.1.tgz",
@@ -4012,7 +4154,8 @@
     "word-wrap": {
       "version": "1.2.3",
       "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.3.tgz",
-      "integrity": "sha512-Hz/mrNwitNRh/HUAtM/VT/5VH+ygD6DV7mYKZAtHOrbs8U7lvPS6xf7EJKMF0uW1KJCl0H701g3ZGus+muE5vQ=="
+      "integrity": "sha512-Hz/mrNwitNRh/HUAtM/VT/5VH+ygD6DV7mYKZAtHOrbs8U7lvPS6xf7EJKMF0uW1KJCl0H701g3ZGus+muE5vQ==",
+      "dev": true
     },
     "wrappy": {
       "version": "1.0.2",
diff --git a/package.json b/package.json
index 4a60adc..30f96fe 100644
--- a/package.json
+++ b/package.json
@@ -3,23 +3,33 @@
   "version": "0.6.0",
   "description": "RollupJS plugin to remove assertion calls via Unassert",
   "main": "dist/rollup-plugin-unassert.cjs.js",
-  "module": "dist/rollup-plugin-unassert.es.js",
+  "module": "dist/rollup-plugin-unassert.esm.js",
+  "types": "dist/rollup-plugin-unassert.d.ts",
+  "exports": {
+    ".": {
+      "types": {
+        "import": "./dist/rollup-plugin-unassert.cjs.d.ts",
+        "require": "./dist/rollup-plugin-unassert.esm.d.ts"
+      },
+      "import": "./dist/rollup-plugin-unassert.cjs.js",
+      "require": "./dist/rollup-plugin-unassert.esm.js"
+    },
+    "./package.json": "./package.json"
+  },
   "files": [
     "src",
     "dist"
   ],
   "dependencies": {
-    "@javascript-obfuscator/escodegen": "^2.3.0",
     "@rollup/pluginutils": "^4.2.1",
-    "acorn": "^8.8.0",
-    "convert-source-map": "^1.8.0",
-    "multi-stage-sourcemap": "^0.3.1",
     "unassert": "^2.0.0"
   },
   "devDependencies": {
     "eslint": "^8.21.0",
     "eslint-config-mourner": "^3.0.0",
     "rollup": "^2.77.3",
+    "rollup-plugin-cleanup": "^3.2.1",
+    "rollup-plugin-copy": "^3.4.0",
     "tape": "^5.5.3"
   },
   "scripts": {
@@ -31,6 +41,9 @@
   },
   "eslintConfig": {
     "extends": "mourner",
+    "parserOptions": {
+      "ecmaVersion": "latest"
+    },
     "rules": {
       "no-process-exit": 0
     }
diff --git a/rollup.config.js b/rollup.config.js
index 696ca60..b870671 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -1,14 +1,26 @@
+import copy from 'rollup-plugin-copy';
+import cleanup from 'rollup-plugin-cleanup';
 
-const config = format => ({
+export default {
     input: 'src/unassert.js',
-    external: ['rollup-pluginutils', 'acorn', '@javascript-obfuscator/escodegen', 'unassert', 'convert-source-map', 'multi-stage-sourcemap'],
-    output: {
-        file: `dist/rollup-plugin-unassert.${format}.js`,
-        format
-    }
-});
-
-export default [
-    config('cjs'),
-    config('es')
-];
+    external: ['@rollup/pluginutils', 'unassert'],
+    output: [
+        {
+            file: 'dist/rollup-plugin-unassert.cjs.js',
+            format: 'cjs',
+        },
+        {
+            file: 'dist/rollup-plugin-unassert.esm.js',
+            format: 'esm',
+        },
+    ],
+    plugins: [
+        cleanup(),
+        copy({
+            targets: [
+                {src: 'src/index.d.ts', dest: 'dist', rename: 'rollup-plugin-unassert.cjs.d.ts'},
+                {src: 'src/index.d.ts', dest: 'dist', rename: 'rollup-plugin-unassert.esm.d.ts'},
+            ],
+        }),
+    ],
+};
diff --git a/src/index.d.ts b/src/index.d.ts
new file mode 100644
index 0000000..81c34b6
--- /dev/null
+++ b/src/index.d.ts
@@ -0,0 +1,12 @@
+import type { UnassertCodeOptions } from "unassert";
+import type { FilterPattern } from "@rollup/pluginutils";
+import type { Plugin } from "rollup";
+
+export type Options = Partial<{
+  include: FilterPattern;
+  exclude: FilterPattern;
+  sourcemap: boolean;
+  unassertOptions: Omit<UnassertCodeOptions, "sourceMap">;
+}>;
+
+export default function (options?: Options): Plugin;
\ No newline at end of file
diff --git a/src/unassert.js b/src/unassert.js
index da1cab0..d1b469d 100644
--- a/src/unassert.js
+++ b/src/unassert.js
@@ -1,94 +1,28 @@
-
 import {createFilter} from '@rollup/pluginutils';
-import acorn from 'acorn';
-import escodegen from '@javascript-obfuscator/escodegen';
-import {unassertAst} from 'unassert';
-import convert from 'convert-source-map';
-import {transfer} from 'multi-stage-sourcemap';
-
-// Adapted from https://github.com/unassert-js/unassertify/blob/master/index.js
-// by Takuto Wada (MIT-licensed)
-
-function handleIncomingSourceMap(originalCode) {
-    const commented = convert.fromSource(originalCode);
-    if (commented) {
-        return commented.toObject();
-    }
-    return null;
-}
-
-function overwritePropertyIfExists(name, from, to) {
-    // eslint-disable-next-line no-prototype-builtins
-    if (from.hasOwnProperty(name)) {
-        to.setProperty(name, from[name]);
-    }
-}
-function reconnectSourceMap(inMap, outMap) {
-    const mergedRawMap = mergeSourceMap(inMap, outMap.toObject());
-    const reMap = convert.fromObject(mergedRawMap);
-    overwritePropertyIfExists('sources', inMap, reMap);
-    overwritePropertyIfExists('sourceRoot', inMap, reMap);
-    overwritePropertyIfExists('sourcesContent', inMap, reMap);
-    return reMap;
-}
-
-function mergeSourceMap(incomingSourceMap, outgoingSourceMap) {
-    if (typeof outgoingSourceMap === 'string' || outgoingSourceMap instanceof String) {
-        outgoingSourceMap = JSON.parse(outgoingSourceMap);
-    }
-    if (!incomingSourceMap) {
-        return outgoingSourceMap;
-    }
-    return JSON.parse(transfer({fromSourceMap: outgoingSourceMap, toSourceMap: incomingSourceMap}));
-}
+import {unassertCode} from 'unassert';
 
 export default function unassert(options = {}) {
-    if (options.sourcemap === undefined) {
-        options.sourcemap = true;
-    }
-
     const filter = createFilter(
-        options.include || ['*.js', '**/*.js'],
+        options.include ?? ['*.js', '**/*.js'],
         options.exclude
     );
 
+    const unassertOptions = options.unassertOptions ?? {};
+
     return {
         name: 'unassert',
         transform(code, id) {
-            if (!filter(id)) { return null; }
-
-            return new Promise((resolve) => {
-                const comments = [];
-                const tokens = [];
-
-                const ast = acorn.parse(code, {
-                    sourceType: 'module',
-                    ecmaVersion: 'latest',
-                    locations: true,
-                    ranges: true,
-                    onComment: comments,
-                    onToken: tokens,
-                });
-
-                escodegen.attachComments(ast, comments, tokens);
-                const unassertedAst = escodegen.generate(unassertAst(ast), {
-                    sourceMap: id,
-                    sourceContent: code,
-                    sourceMapWithCode: true,
-                    comment: true,
-                });
-
-                const inMap = options.sourcemap && handleIncomingSourceMap(code);
-                let outMap = convert.fromJSON(unassertedAst.map.toString());
-                if (inMap) {
-                    outMap = reconnectSourceMap(inMap, outMap);
-                }
-
-                resolve({
-                    code: unassertedAst.code,
-                    map: outMap.toObject()
-                });
+            if (!filter(id)) {
+                return null;
+            }
+
+            const ast = this.parse(code);
+            return unassertCode(code, ast, {
+                sourceMap: options.sourcemap !== false ?
+                    {hires: true} :
+                    false,
+                ...unassertOptions
             });
-        }
+        },
     };
 }
diff --git a/test/expected.js b/test/expected.js
index c8eef17..17dceb8 100644
--- a/test/expected.js
+++ b/test/expected.js
@@ -1,4 +1,5 @@
-function add(a, b) {
+function add (a, b) {
     return a + b;
 }
+
 console.log(add(1, 2));
diff --git a/test/original.js b/test/original.js
index c039190..0bc6885 100644
--- a/test/original.js
+++ b/test/original.js
@@ -1,12 +1,9 @@
-'use strict';
-
 var assert = require('assert');
 
 function add (a, b) {
     console.assert(typeof a === 'number');
     assert(!isNaN(a));
-    assert.equal(typeof b, 'number');
-    assert.ok(!isNaN(b));
+    (assert.equal(typeof b, 'number'), assert.ok(!isNaN(b)));
     return a + b;
 }