From 8277e6084cd5f713f56b1f0f70926a094ccd7c5f Mon Sep 17 00:00:00 2001
From: "Nanashi." <sevenc7c@sevenc7c.com>
Date: Tue, 19 Nov 2024 18:21:33 +0900
Subject: [PATCH] =?UTF-8?q?Deno=E3=81=AEstd/path=E3=81=AB=E7=BD=AE?=
 =?UTF-8?q?=E3=81=8D=E6=8F=9B=E3=81=88=E3=82=8B=20(#2365)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Co-authored-by: Hiroshiba <hihokaruta@gmail.com>
---
 .eslintrc.js                                  |   6 +-
 package-lock.json                             | 869 +-----------------
 package.json                                  |   4 +-
 src/backend/browser/fileImpl.ts               |  27 +-
 src/backend/electron/main.ts                  |   2 +-
 .../Dialog/SettingDialog/SettingDialog.vue    |   2 +-
 .../Sing/ToolBar/EditTargetSwicher.vue        |   2 +-
 src/components/Talk/AudioDetail.vue           |   3 +-
 src/components/Talk/TalkEditor.vue            |   2 +-
 src/composables/useModifierKey.ts             |   2 +-
 src/helpers/path.ts                           |   9 +
 src/helpers/platform.ts                       |  30 +
 src/sing/viewHelper.ts                        |   3 +-
 src/store/index.ts                            |   2 +-
 src/store/project.ts                          |   7 +-
 src/store/singing.ts                          |   2 +-
 src/store/utility.ts                          |  29 +-
 src/type/preload.ts                           |  28 +-
 tests/unit/composable/useModifierKey.spec.ts  |   2 +-
 tests/unit/domain/project.spec.ts             |   4 +-
 tests/unit/store/utility.spec.ts              |  10 +-
 vite.config.mts                               |  34 +-
 22 files changed, 99 insertions(+), 980 deletions(-)
 create mode 100644 src/helpers/path.ts
 create mode 100644 src/helpers/platform.ts

diff --git a/.eslintrc.js b/.eslintrc.js
index 2a0e360cc0..1477adfb4e 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -44,7 +44,11 @@ module.exports = {
   plugins: ["import"],
   parser: vueEslintParser,
   parserOptions: vueEslintParserOptions,
-  ignorePatterns: ["dist_electron/**/*", "dist/**/*", "node_modules/**/*"],
+  ignorePatterns: [
+    "dist/**/*",
+    "dist_*/**/*",
+    "node_modules/**/*",
+  ],
   rules: {
     "linebreak-style":
       process.env.NODE_ENV === "production" && process.platform !== "win32"
diff --git a/package-lock.json b/package-lock.json
index eedb7569c8..9db0bb586e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,6 +12,7 @@
         "@gtm-support/vue-gtm": "1.2.3",
         "@quasar/extras": "1.10.10",
         "@sevenc-nanashi/utaformatix-ts": "npm:@jsr/sevenc-nanashi__utaformatix-ts@0.4.0",
+        "@std/path": "npm:@jsr/std__path@1.0.8",
         "async-lock": "1.4.0",
         "dayjs": "1.10.7",
         "electron-log": "5.1.2",
@@ -95,7 +96,6 @@
         "vite": "5.4.11",
         "vite-plugin-checker": "0.8.0",
         "vite-plugin-electron": "0.29.0",
-        "vite-plugin-node-polyfills": "0.22.0",
         "vite-tsconfig-paths": "5.1.2",
         "vitest": "2.1.2",
         "vue-tsc": "2.1.10",
@@ -2248,79 +2248,6 @@
         "vue": "^3.0.0"
       }
     },
-    "node_modules/@rollup/plugin-inject": {
-      "version": "5.0.5",
-      "resolved": "https://registry.npmjs.org/@rollup/plugin-inject/-/plugin-inject-5.0.5.tgz",
-      "integrity": "sha512-2+DEJbNBoPROPkgTDNe8/1YXWcqxbN5DTjASVIOx8HS+pITXushyNiBV56RB08zuptzz8gT3YfkqriTBVycepg==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "@rollup/pluginutils": "^5.0.1",
-        "estree-walker": "^2.0.2",
-        "magic-string": "^0.30.3"
-      },
-      "engines": {
-        "node": ">=14.0.0"
-      },
-      "peerDependencies": {
-        "rollup": "^1.20.0||^2.0.0||^3.0.0||^4.0.0"
-      },
-      "peerDependenciesMeta": {
-        "rollup": {
-          "optional": true
-        }
-      }
-    },
-    "node_modules/@rollup/plugin-inject/node_modules/estree-walker": {
-      "version": "2.0.2",
-      "resolved": "https://registry.npmjs.org/estree-walker/-/estree-walker-2.0.2.tgz",
-      "integrity": "sha512-Rfkk/Mp/DL7JVje3u18FxFujQlTNR2q6QfMSMB7AvCBx91NGj/ba3kCfza0f6dVDbw7YlRf/nDrn7pQrCCyQ/w==",
-      "dev": true,
-      "license": "MIT"
-    },
-    "node_modules/@rollup/pluginutils": {
-      "version": "5.1.3",
-      "resolved": "https://registry.npmjs.org/@rollup/pluginutils/-/pluginutils-5.1.3.tgz",
-      "integrity": "sha512-Pnsb6f32CD2W3uCaLZIzDmeFyQ2b8UWMFI7xtwUezpcGBDVDW6y9XgAWIlARiGAo6eNF5FK5aQTr0LFyNyqq5A==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "@types/estree": "^1.0.0",
-        "estree-walker": "^2.0.2",
-        "picomatch": "^4.0.2"
-      },
-      "engines": {
-        "node": ">=14.0.0"
-      },
-      "peerDependencies": {
-        "rollup": "^1.20.0||^2.0.0||^3.0.0||^4.0.0"
-      },
-      "peerDependenciesMeta": {
-        "rollup": {
-          "optional": true
-        }
-      }
-    },
-    "node_modules/@rollup/pluginutils/node_modules/estree-walker": {
-      "version": "2.0.2",
-      "resolved": "https://registry.npmjs.org/estree-walker/-/estree-walker-2.0.2.tgz",
-      "integrity": "sha512-Rfkk/Mp/DL7JVje3u18FxFujQlTNR2q6QfMSMB7AvCBx91NGj/ba3kCfza0f6dVDbw7YlRf/nDrn7pQrCCyQ/w==",
-      "dev": true,
-      "license": "MIT"
-    },
-    "node_modules/@rollup/pluginutils/node_modules/picomatch": {
-      "version": "4.0.2",
-      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-4.0.2.tgz",
-      "integrity": "sha512-M7BAV6Rlcy5u+m6oPhAPFgJTzAioX/6B0DxyvDlo9l8+T3nLKbrczg2WLUyzd45L8RqfUMyGPzekbMvX2Ldkwg==",
-      "dev": true,
-      "license": "MIT",
-      "engines": {
-        "node": ">=12"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/jonschlinkert"
-      }
-    },
     "node_modules/@rollup/rollup-android-arm-eabi": {
       "version": "4.27.2",
       "resolved": "https://registry.npmjs.org/@rollup/rollup-android-arm-eabi/-/rollup-android-arm-eabi-4.27.2.tgz",
@@ -2597,6 +2524,12 @@
         "url": "https://github.com/sindresorhus/is?sponsor=1"
       }
     },
+    "node_modules/@std/path": {
+      "name": "@jsr/std__path",
+      "version": "1.0.8",
+      "resolved": "https://npm.jsr.io/~/11/@jsr/std__path/1.0.8.tgz",
+      "integrity": "sha512-eNBGlh/8ZVkMxtFH4bwIzlAeKoHYk5in4wrBZhi20zMdOiuX4QozP4+19mIXBT2lzHDjhuVLyECbhFeR304iDg=="
+    },
     "node_modules/@storybook/addon-actions": {
       "version": "8.4.4",
       "resolved": "https://registry.npmjs.org/@storybook/addon-actions/-/addon-actions-8.4.4.tgz",
@@ -5122,39 +5055,6 @@
       "dev": true,
       "license": "MIT"
     },
-    "node_modules/asn1.js": {
-      "version": "4.10.1",
-      "resolved": "https://registry.npmjs.org/asn1.js/-/asn1.js-4.10.1.tgz",
-      "integrity": "sha512-p32cOF5q0Zqs9uBiONKYLm6BClCoBCM5O9JfeUSlnQLBTxYdTK+pW+nXflm8UkKd2UYlEbYz5qEi0JuZR9ckSw==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "bn.js": "^4.0.0",
-        "inherits": "^2.0.1",
-        "minimalistic-assert": "^1.0.0"
-      }
-    },
-    "node_modules/asn1.js/node_modules/bn.js": {
-      "version": "4.12.1",
-      "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.12.1.tgz",
-      "integrity": "sha512-k8TVBiPkPJT9uHLdOKfFpqcfprwBFOAAXXozRubr7R7PfIuKvQlzcI4M0pALeqXN09vdaMbUdUj+pass+uULAg==",
-      "dev": true,
-      "license": "MIT"
-    },
-    "node_modules/assert": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/assert/-/assert-2.1.0.tgz",
-      "integrity": "sha512-eLHpSK/Y4nhMJ07gDaAzoX/XAKS8PSaojml3M0DM4JpV1LAi5JOJ/p6H/XWrl8L+DzVEvVCW1z3vWAaB9oTsQw==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "call-bind": "^1.0.2",
-        "is-nan": "^1.3.2",
-        "object-is": "^1.1.5",
-        "object.assign": "^4.1.4",
-        "util": "^0.12.5"
-      }
-    },
     "node_modules/assert-never": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/assert-never/-/assert-never-1.3.0.tgz",
@@ -5378,13 +5278,6 @@
         "bluebird": "^3.5.5"
       }
     },
-    "node_modules/bn.js": {
-      "version": "5.2.1",
-      "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-5.2.1.tgz",
-      "integrity": "sha512-eXRvHzWyYPBuB4NBy0cmYQjGitUrtqwbvlzP3G6VFnNRbsZQIxQ10PbKKHt8gZ/HW/D/747aDl+QkDqg3KQLMQ==",
-      "dev": true,
-      "license": "MIT"
-    },
     "node_modules/boolbase": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/boolbase/-/boolbase-1.0.0.tgz",
@@ -5423,163 +5316,12 @@
         "node": ">=8"
       }
     },
-    "node_modules/brorand": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/brorand/-/brorand-1.1.0.tgz",
-      "integrity": "sha512-cKV8tMCEpQs4hK/ik71d6LrPOnpkpGBR0wzxqr68g2m/LB2GxVYQroAjMJZRVM1Y4BCjCKc3vAamxSzOY2RP+w==",
-      "dev": true,
-      "license": "MIT"
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       "dev": true
     },
-    "node_modules/browser-resolve": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/browser-resolve/-/browser-resolve-2.0.0.tgz",
-      "integrity": "sha512-7sWsQlYL2rGLy2IWm8WL8DCTJvYLc/qlOnsakDac87SOoCd16WLsaAMdCiAqsTNHIe+SXfaqyxyo6THoWqs8WQ==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "resolve": "^1.17.0"
-      }
-    },
-    "node_modules/browserify-aes": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/browserify-aes/-/browserify-aes-1.2.0.tgz",
-      "integrity": "sha512-+7CHXqGuspUn/Sl5aO7Ea0xWGAtETPXNSAjHo48JfLdPWcMng33Xe4znFvQweqc/uzk5zSOI3H52CYnjCfb5hA==",
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-      "license": "MIT",
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-        "browserify-des": "^1.0.0",
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-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "cipher-base": "^1.0.1",
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-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
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-    "node_modules/browserify-sign/node_modules/string_decoder/node_modules/safe-buffer": {
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-      "dev": true,
-      "license": "MIT"
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-    "node_modules/browserify-zlib": {
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-      "resolved": "https://registry.npmjs.org/browserify-zlib/-/browserify-zlib-0.2.0.tgz",
-      "integrity": "sha512-Z942RysHXmJrhqk88FmKBVq/v5tqmSkDz7p54G/MGyjMnCFFnC79XWNbg+Vta8W6Wb2qtSZTSxIGkJrRpCFEiA==",
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@@ -5629,13 +5371,6 @@
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       "license": "MIT"
     },
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-      "resolved": "https://registry.npmjs.org/buffer-xor/-/buffer-xor-1.0.3.tgz",
-      "integrity": "sha512-571s0T7nZWK6vB67HI5dyUF7wXiNcfaPPPTl6zYCNApANjIvYJTg7hlud/+cJpdAhS7dVzqMLmfhfHR3rAcOjQ==",
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@@ -5675,13 +5410,6 @@
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@@ -6020,17 +5748,6 @@
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-      "resolved": "https://registry.npmjs.org/cipher-base/-/cipher-base-1.0.4.tgz",
-      "integrity": "sha512-Kkht5ye6ZGmwv40uUDZztayT2ThLQGfnj/T71N/XzeZeo3nf8foyW7zGTsPYkEya3m5f3cAypH+qe7YOrM1U2Q==",
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@@ -6397,12 +6114,6 @@
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@@ -6434,13 +6145,6 @@
         "@babel/types": "^7.6.1"
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-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "find-up": "^5.0.0"
-      },
-      "engines": {
-        "node": ">=10"
-      }
-    },
-    "node_modules/node-stdlib-browser/node_modules/punycode": {
-      "version": "1.4.1",
-      "resolved": "https://registry.npmjs.org/punycode/-/punycode-1.4.1.tgz",
-      "integrity": "sha512-jmYNElW7yvO7TV33CjSmvSiE2yco3bV2czu/OzDKdMNVZQWfxCblURLhf+47syQRBntjfLdd/H0egrzIG+oaFQ==",
-      "dev": true,
-      "license": "MIT"
-    },
     "node_modules/nopt": {
       "version": "7.2.1",
       "resolved": "https://registry.npmjs.org/nopt/-/nopt-7.2.1.tgz",
@@ -12125,23 +11484,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/object-is": {
-      "version": "1.1.6",
-      "resolved": "https://registry.npmjs.org/object-is/-/object-is-1.1.6.tgz",
-      "integrity": "sha512-F8cZ+KfGlSGi09lJT7/Nd6KJZ9ygtvYC0/UYYLI9nmQKLMnydpB9yvbv9K1uSkEu7FU9vYPmVwLg328tX+ot3Q==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "call-bind": "^1.0.7",
-        "define-properties": "^1.2.1"
-      },
-      "engines": {
-        "node": ">= 0.4"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/ljharb"
-      }
-    },
     "node_modules/object-keys": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/object-keys/-/object-keys-1.1.1.tgz",
@@ -12321,13 +11663,6 @@
         "node": ">=8"
       }
     },
-    "node_modules/os-browserify": {
-      "version": "0.3.0",
-      "resolved": "https://registry.npmjs.org/os-browserify/-/os-browserify-0.3.0.tgz",
-      "integrity": "sha512-gjcpUc3clBf9+210TRaDWbf+rZZZEshZ+DlXMRCeAjp0xhTrnQsKHypIy1J3d5hKdUzj69t708EHtU8P6bUn0A==",
-      "dev": true,
-      "license": "MIT"
-    },
     "node_modules/os-tmpdir": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/os-tmpdir/-/os-tmpdir-1.0.2.tgz",
@@ -12477,24 +11812,6 @@
         "node": ">=6"
       }
     },
-    "node_modules/parse-asn1": {
-      "version": "5.1.7",
-      "resolved": "https://registry.npmjs.org/parse-asn1/-/parse-asn1-5.1.7.tgz",
-      "integrity": "sha512-CTM5kuWR3sx9IFamcl5ErfPl6ea/N8IYwiJ+vpeB2g+1iknv7zBl5uPwbMbRVznRVbrNY6lGuDoE5b30grmbqg==",
-      "dev": true,
-      "license": "ISC",
-      "dependencies": {
-        "asn1.js": "^4.10.1",
-        "browserify-aes": "^1.2.0",
-        "evp_bytestokey": "^1.0.3",
-        "hash-base": "~3.0",
-        "pbkdf2": "^3.1.2",
-        "safe-buffer": "^5.2.1"
-      },
-      "engines": {
-        "node": ">= 0.10"
-      }
-    },
     "node_modules/path-browserify": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/path-browserify/-/path-browserify-1.0.1.tgz",
@@ -12596,23 +11913,6 @@
         "node": ">= 14.16"
       }
     },
-    "node_modules/pbkdf2": {
-      "version": "3.1.2",
-      "resolved": "https://registry.npmjs.org/pbkdf2/-/pbkdf2-3.1.2.tgz",
-      "integrity": "sha512-iuh7L6jA7JEGu2WxDwtQP1ddOpaJNC4KlDEFfdQajSGgGPNi4OyDc2R7QnbY2bR9QjBVGwgvTdNJZoE7RaxUMA==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "create-hash": "^1.1.2",
-        "create-hmac": "^1.1.4",
-        "ripemd160": "^2.0.1",
-        "safe-buffer": "^5.0.1",
-        "sha.js": "^2.4.8"
-      },
-      "engines": {
-        "node": ">=0.12"
-      }
-    },
     "node_modules/pe-library": {
       "version": "0.4.1",
       "resolved": "https://registry.npmjs.org/pe-library/-/pe-library-0.4.1.tgz",
@@ -13033,28 +12333,6 @@
         "punycode": "^2.3.1"
       }
     },
-    "node_modules/public-encrypt": {
-      "version": "4.0.3",
-      "resolved": "https://registry.npmjs.org/public-encrypt/-/public-encrypt-4.0.3.tgz",
-      "integrity": "sha512-zVpa8oKZSz5bTMTFClc1fQOnyyEzpl5ozpi1B5YcvBrdohMjH2rfsBtyXcuNuwjsDIXmBYlF2N5FlJYhR29t8Q==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "bn.js": "^4.1.0",
-        "browserify-rsa": "^4.0.0",
-        "create-hash": "^1.1.0",
-        "parse-asn1": "^5.0.0",
-        "randombytes": "^2.0.1",
-        "safe-buffer": "^5.1.2"
-      }
-    },
-    "node_modules/public-encrypt/node_modules/bn.js": {
-      "version": "4.12.1",
-      "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.12.1.tgz",
-      "integrity": "sha512-k8TVBiPkPJT9uHLdOKfFpqcfprwBFOAAXXozRubr7R7PfIuKvQlzcI4M0pALeqXN09vdaMbUdUj+pass+uULAg==",
-      "dev": true,
-      "license": "MIT"
-    },
     "node_modules/pug": {
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/pug/-/pug-3.0.3.tgz",
@@ -13242,15 +12520,6 @@
         "url": "https://donate.quasar.dev"
       }
     },
-    "node_modules/querystring-es3": {
-      "version": "0.2.1",
-      "resolved": "https://registry.npmjs.org/querystring-es3/-/querystring-es3-0.2.1.tgz",
-      "integrity": "sha512-773xhDQnZBMFobEiztv8LIl70ch5MSF/jUQVlhwFyBILqq96anmoctVIYz+ZRp0qbCKATTn6ev02M3r7Ga5vqA==",
-      "dev": true,
-      "engines": {
-        "node": ">=0.4.x"
-      }
-    },
     "node_modules/querystringify": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/querystringify/-/querystringify-2.2.0.tgz",
@@ -13314,27 +12583,6 @@
         "vue": ">= 3.2.0"
       }
     },
-    "node_modules/randombytes": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/randombytes/-/randombytes-2.1.0.tgz",
-      "integrity": "sha512-vYl3iOX+4CKUWuxGi9Ukhie6fsqXqS9FE2Zaic4tNFD2N2QQaXOMFbuKK4QmDHC0JO6B1Zp41J0LpT0oR68amQ==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "safe-buffer": "^5.1.0"
-      }
-    },
-    "node_modules/randomfill": {
-      "version": "1.0.4",
-      "resolved": "https://registry.npmjs.org/randomfill/-/randomfill-1.0.4.tgz",
-      "integrity": "sha512-87lcbR8+MhcWcUiQ+9e+Rwx8MyR2P7qnt15ynUlbm3TU/fjbgz4GsvfSUDTemtCCtVCqb4ZcEFlyPNTh9bBTLw==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "randombytes": "^2.0.5",
-        "safe-buffer": "^5.1.0"
-      }
-    },
     "node_modules/react": {
       "version": "18.3.1",
       "resolved": "https://registry.npmjs.org/react/-/react-18.3.1.tgz",
@@ -13786,17 +13034,6 @@
         "node": "*"
       }
     },
-    "node_modules/ripemd160": {
-      "version": "2.0.2",
-      "resolved": "https://registry.npmjs.org/ripemd160/-/ripemd160-2.0.2.tgz",
-      "integrity": "sha512-ii4iagi25WusVoiC4B4lq7pbXfAp3D9v5CwfkY33vffw2+pkDjY1D8GaN7spsxvCSx8dkPqOZCEZyfxcmJG2IA==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "hash-base": "^3.0.0",
-        "inherits": "^2.0.1"
-      }
-    },
     "node_modules/roarr": {
       "version": "2.15.4",
       "resolved": "https://registry.npmjs.org/roarr/-/roarr-2.15.4.tgz",
@@ -14543,20 +13780,6 @@
       "integrity": "sha512-MATJdZp8sLqDl/68LfQmbP8zKPLQNV6BIZoIgrscFDQ+RsvK/BxeDQOgyxKKoh0y/8h3BqVFnCqQ/gd+reiIXA==",
       "license": "MIT"
     },
-    "node_modules/sha.js": {
-      "version": "2.4.11",
-      "resolved": "https://registry.npmjs.org/sha.js/-/sha.js-2.4.11.tgz",
-      "integrity": "sha512-QMEp5B7cftE7APOjk5Y6xgrbWu+WkLVQwk8JNjZ8nKRciZaByEW6MubieAiToS7+dwvrjGhH8jRXz3MVd0AYqQ==",
-      "dev": true,
-      "license": "(MIT AND BSD-3-Clause)",
-      "dependencies": {
-        "inherits": "^2.0.1",
-        "safe-buffer": "^5.0.1"
-      },
-      "bin": {
-        "sha.js": "bin.js"
-      }
-    },
     "node_modules/shebang-command": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-2.0.0.tgz",
@@ -14948,30 +14171,6 @@
         }
       }
     },
-    "node_modules/stream-browserify": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/stream-browserify/-/stream-browserify-3.0.0.tgz",
-      "integrity": "sha512-H73RAHsVBapbim0tU2JwwOiXUj+fikfiaoYAKHF3VJfA0pe2BCzkhAHBlLG6REzE+2WNZcxOXjK7lkso+9euLA==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "inherits": "~2.0.4",
-        "readable-stream": "^3.5.0"
-      }
-    },
-    "node_modules/stream-http": {
-      "version": "3.2.0",
-      "resolved": "https://registry.npmjs.org/stream-http/-/stream-http-3.2.0.tgz",
-      "integrity": "sha512-Oq1bLqisTyK3TSCXpPbT4sdeYNdmyZJv1LxpEm2vu1ZhK89kSE5YXwZc3cWk0MagGaKriBh9mCFbVGtO+vY29A==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "builtin-status-codes": "^3.0.0",
-        "inherits": "^2.0.4",
-        "readable-stream": "^3.6.0",
-        "xtend": "^4.0.2"
-      }
-    },
     "node_modules/strict-event-emitter": {
       "version": "0.5.1",
       "resolved": "https://registry.npmjs.org/strict-event-emitter/-/strict-event-emitter-0.5.1.tgz",
@@ -15348,19 +14547,6 @@
       "dev": true,
       "license": "MIT"
     },
-    "node_modules/timers-browserify": {
-      "version": "2.0.12",
-      "resolved": "https://registry.npmjs.org/timers-browserify/-/timers-browserify-2.0.12.tgz",
-      "integrity": "sha512-9phl76Cqm6FhSX9Xe1ZUAMLtm1BLkKj2Qd5ApyWkXzsMRaA7dgr81kf4wJmQf/hAvg8EEyJxDo3du/0KlhPiKQ==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "setimmediate": "^1.0.4"
-      },
-      "engines": {
-        "node": ">=0.6.0"
-      }
-    },
     "node_modules/tiny-invariant": {
       "version": "1.3.3",
       "resolved": "https://registry.npmjs.org/tiny-invariant/-/tiny-invariant-1.3.3.tgz",
@@ -15685,13 +14871,6 @@
       "dev": true,
       "license": "0BSD"
     },
-    "node_modules/tty-browserify": {
-      "version": "0.0.1",
-      "resolved": "https://registry.npmjs.org/tty-browserify/-/tty-browserify-0.0.1.tgz",
-      "integrity": "sha512-C3TaO7K81YvjCgQH9Q1S3R3P3BtN3RIM8n+OvX4il1K1zgE8ZhI0op7kClgkxtutIE8hQrcrHBXvIheqKUUCxw==",
-      "dev": true,
-      "license": "MIT"
-    },
     "node_modules/tween-functions": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/tween-functions/-/tween-functions-1.2.0.tgz",
@@ -16235,23 +15414,6 @@
         }
       }
     },
-    "node_modules/vite-plugin-node-polyfills": {
-      "version": "0.22.0",
-      "resolved": "https://registry.npmjs.org/vite-plugin-node-polyfills/-/vite-plugin-node-polyfills-0.22.0.tgz",
-      "integrity": "sha512-F+G3LjiGbG8QpbH9bZ//GSBr9i1InSTkaulfUHFa9jkLqVGORFBoqc2A/Yu5Mmh1kNAbiAeKeK+6aaQUf3x0JA==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "@rollup/plugin-inject": "^5.0.5",
-        "node-stdlib-browser": "^1.2.0"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/davidmyersdev"
-      },
-      "peerDependencies": {
-        "vite": "^2.0.0 || ^3.0.0 || ^4.0.0 || ^5.0.0"
-      }
-    },
     "node_modules/vite-tsconfig-paths": {
       "version": "5.1.2",
       "resolved": "https://registry.npmjs.org/vite-tsconfig-paths/-/vite-tsconfig-paths-5.1.2.tgz",
@@ -16839,13 +16001,6 @@
         "url": "https://opencollective.com/vitest"
       }
     },
-    "node_modules/vm-browserify": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/vm-browserify/-/vm-browserify-1.1.2.tgz",
-      "integrity": "sha512-2ham8XPWTONajOR0ohOKOHXkm3+gaBmGut3SRuu75xLd/RRaY6vqgh8NBYYk7+RW3u5AtzPQZG8F10LHkl0lAQ==",
-      "dev": true,
-      "license": "MIT"
-    },
     "node_modules/void-elements": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/void-elements/-/void-elements-3.1.0.tgz",
@@ -17392,16 +16547,6 @@
         "node": ">=8.0"
       }
     },
-    "node_modules/xtend": {
-      "version": "4.0.2",
-      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
-      "integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==",
-      "dev": true,
-      "license": "MIT",
-      "engines": {
-        "node": ">=0.4"
-      }
-    },
     "node_modules/y18n": {
       "version": "5.0.8",
       "resolved": "https://registry.npmjs.org/y18n/-/y18n-5.0.8.tgz",
diff --git a/package.json b/package.json
index e952807c10..bf3c8d9476 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "test-ui:storybook-vrt": "cross-env TARGET=storybook playwright test --ui",
     "lint": "eslint --ext .js,.vue,.ts,.mts *.config.* src tests build .storybook",
     "fmt": "eslint --ext .js,.vue,.ts,.mts *.config.* src tests build .storybook --fix",
-    "markdownlint": "markdownlint --ignore node_modules/ --ignore dist/ --ignore dist_electron/ ./",
+    "markdownlint": "markdownlint --ignore node_modules/ --ignore dist/ --ignore dist_electron/ --ignore dist_preview/ ./",
     "typecheck": "vue-tsc --noEmit",
     "typos": "cross-env ./build/vendored/typos/typos",
     "electron:build": "cross-env VITE_TARGET=electron vite build && electron-builder --config electron-builder.config.js --publish never",
@@ -46,6 +46,7 @@
     "@gtm-support/vue-gtm": "1.2.3",
     "@quasar/extras": "1.10.10",
     "@sevenc-nanashi/utaformatix-ts": "npm:@jsr/sevenc-nanashi__utaformatix-ts@0.4.0",
+    "@std/path": "npm:@jsr/std__path@1.0.8",
     "async-lock": "1.4.0",
     "dayjs": "1.10.7",
     "electron-log": "5.1.2",
@@ -132,7 +133,6 @@
     "vite": "5.4.11",
     "vite-plugin-checker": "0.8.0",
     "vite-plugin-electron": "0.29.0",
-    "vite-plugin-node-polyfills": "0.22.0",
     "vite-tsconfig-paths": "5.1.2",
     "vitest": "2.1.2",
     "vue-tsc": "2.1.10",
diff --git a/src/backend/browser/fileImpl.ts b/src/backend/browser/fileImpl.ts
index 4d161007ad..2c78966774 100644
--- a/src/backend/browser/fileImpl.ts
+++ b/src/backend/browser/fileImpl.ts
@@ -1,4 +1,3 @@
-import { sep } from "path";
 import { directoryHandleStoreKey } from "./contract";
 import { openDB } from "./browserConfig";
 import { SandboxKey } from "@/type/preload";
@@ -6,6 +5,7 @@ import { failure, success } from "@/type/result";
 import { createLogger } from "@/domain/frontend/log";
 import { uuid4 } from "@/helpers/random";
 import { normalizeError } from "@/helpers/normalizeError";
+import path from "@/helpers/path";
 
 const log = createLogger("fileImpl");
 
@@ -73,12 +73,13 @@ export const showOpenDirectoryDialogImpl: (typeof window)[typeof SandboxKey]["sh
   };
 
 // separator 以前の文字列はディレクトリ名として扱う
-const resolveDirectoryName = (path: string) => path.split(sep)[0];
+const resolveDirectoryName = (dirPath: string) =>
+  dirPath.split(path.SEPARATOR)[0];
 
 // FileSystemDirectoryHandle.getFileHandle では / のような separator が含まれるとエラーになるため、ファイル名のみを抽出している
 const resolveFileName = (path: string) => {
   const maybeDirectoryHandleName = resolveDirectoryName(path);
-  return path.slice(maybeDirectoryHandleName.length + sep.length);
+  return path.slice(maybeDirectoryHandleName.length + 1);
 };
 
 // FileSystemDirectoryHandle.getFileHandle では / のような separator が含まれるとエラーになるため、以下の if 文で separator を除去している
@@ -116,13 +117,13 @@ const getDirectoryHandleFromDirectoryPath = async (
 // また GENERATE_AND_SAVE_ALL_AUDIO action では fixedExportEnabled の有効の有無に関わらず、ディレクトリ名も指定された状態でfilePathが渡ってくる
 export const writeFileImpl: (typeof window)[typeof SandboxKey]["writeFile"] =
   async (obj: { filePath: string; buffer: ArrayBuffer }) => {
-    const path = obj.filePath;
+    const filePath = obj.filePath;
 
-    if (!path.includes(sep)) {
+    if (!filePath.includes(path.SEPARATOR)) {
       const aTag = document.createElement("a");
       const blob = URL.createObjectURL(new Blob([obj.buffer]));
       aTag.href = blob;
-      aTag.download = path;
+      aTag.download = filePath;
       document.body.appendChild(aTag);
       aTag.click();
       document.body.removeChild(aTag);
@@ -130,8 +131,8 @@ export const writeFileImpl: (typeof window)[typeof SandboxKey]["writeFile"] =
       return success(undefined);
     }
 
-    const fileName = resolveFileName(path);
-    const maybeDirectoryHandleName = resolveDirectoryName(path);
+    const fileName = resolveFileName(filePath);
+    const maybeDirectoryHandleName = resolveDirectoryName(filePath);
 
     const directoryHandle = await getDirectoryHandleFromDirectoryPath(
       maybeDirectoryHandleName,
@@ -153,15 +154,13 @@ export const writeFileImpl: (typeof window)[typeof SandboxKey]["writeFile"] =
   };
 
 export const checkFileExistsImpl: (typeof window)[typeof SandboxKey]["checkFileExists"] =
-  async (file) => {
-    const path = file;
-
-    if (!path.includes(sep)) {
+  async (filePath) => {
+    if (!filePath.includes(path.SEPARATOR)) {
       return Promise.resolve(false);
     }
 
-    const fileName = resolveFileName(path);
-    const maybeDirectoryHandleName = resolveDirectoryName(path);
+    const fileName = resolveFileName(filePath);
+    const maybeDirectoryHandleName = resolveDirectoryName(filePath);
 
     const directoryHandle = await getDirectoryHandleFromDirectoryPath(
       maybeDirectoryHandleName,
diff --git a/src/backend/electron/main.ts b/src/backend/electron/main.ts
index d6d48fba03..b7bc8c41b6 100644
--- a/src/backend/electron/main.ts
+++ b/src/backend/electron/main.ts
@@ -41,12 +41,12 @@ import {
   EngineInfo,
   SystemError,
   defaultHotkeySettings,
-  isMac,
   defaultToolbarButtonSetting,
   EngineId,
   TextAsset,
 } from "@/type/preload";
 import { themes } from "@/domain/theme";
+import { isMac } from "@/helpers/platform";
 
 type SingleInstanceLockData = {
   filePath: string | undefined;
diff --git a/src/components/Dialog/SettingDialog/SettingDialog.vue b/src/components/Dialog/SettingDialog/SettingDialog.vue
index d8cc3f35c7..3f3dfa452d 100644
--- a/src/components/Dialog/SettingDialog/SettingDialog.vue
+++ b/src/components/Dialog/SettingDialog/SettingDialog.vue
@@ -484,7 +484,6 @@ import {
   buildSongTrackAudioFileNameFromRawData,
 } from "@/store/utility";
 import {
-  isProduction,
   SavingSetting,
   EngineSettingType,
   ExperimentalSettingType,
@@ -495,6 +494,7 @@ import {
 } from "@/type/preload";
 import { createLogger } from "@/domain/frontend/log";
 import { useRootMiscSetting } from "@/composables/useRootMiscSetting";
+import { isProduction } from "@/helpers/platform";
 
 type SamplingRateOption = EngineSettingType["outputSamplingRate"];
 
diff --git a/src/components/Sing/ToolBar/EditTargetSwicher.vue b/src/components/Sing/ToolBar/EditTargetSwicher.vue
index 70d91d118b..99b0371975 100644
--- a/src/components/Sing/ToolBar/EditTargetSwicher.vue
+++ b/src/components/Sing/ToolBar/EditTargetSwicher.vue
@@ -42,7 +42,7 @@
 
 <script setup lang="ts">
 import { SequencerEditTarget } from "@/store/type";
-import { isMac } from "@/type/preload";
+import { isMac } from "@/helpers/platform";
 
 defineProps<{
   editTarget: SequencerEditTarget;
diff --git a/src/components/Talk/AudioDetail.vue b/src/components/Talk/AudioDetail.vue
index a32016174b..a1696436fb 100644
--- a/src/components/Talk/AudioDetail.vue
+++ b/src/components/Talk/AudioDetail.vue
@@ -85,7 +85,8 @@ import { computed, nextTick, ref, watch } from "vue";
 import AccentPhrase from "./AccentPhrase.vue";
 import ToolTip from "@/components/ToolTip.vue";
 import { useStore } from "@/store";
-import { AudioKey, isMac } from "@/type/preload";
+import { AudioKey } from "@/type/preload";
+import { isMac } from "@/helpers/platform";
 import { EngineManifest } from "@/openapi/models";
 import { useShiftKey, useAltKey } from "@/composables/useModifierKey";
 import { useHotkeyManager } from "@/plugins/hotkeyPlugin";
diff --git a/src/components/Talk/TalkEditor.vue b/src/components/Talk/TalkEditor.vue
index 2f8bea2fdc..2038c1e3e8 100644
--- a/src/components/Talk/TalkEditor.vue
+++ b/src/components/Talk/TalkEditor.vue
@@ -118,7 +118,6 @@
 </template>
 
 <script setup lang="ts">
-import path from "path";
 import { computed, onBeforeUpdate, ref, toRaw, VNodeRef, watch } from "vue";
 import Draggable from "vuedraggable";
 import { QResizeObserver } from "quasar";
@@ -141,6 +140,7 @@ import {
 } from "@/type/preload";
 import { useHotkeyManager } from "@/plugins/hotkeyPlugin";
 import onetimeWatch from "@/helpers/onetimeWatch";
+import path from "@/helpers/path";
 
 const props = defineProps<{
   isEnginesReady: boolean;
diff --git a/src/composables/useModifierKey.ts b/src/composables/useModifierKey.ts
index f06220eea8..73ddaa945d 100644
--- a/src/composables/useModifierKey.ts
+++ b/src/composables/useModifierKey.ts
@@ -6,7 +6,7 @@ import {
   MaybeRefOrGetter,
   toValue,
 } from "vue";
-import { isMac } from "@/type/preload";
+import { isMac } from "@/helpers/platform";
 
 type Target = EventTarget & GlobalEventHandlers;
 
diff --git a/src/helpers/path.ts b/src/helpers/path.ts
new file mode 100644
index 0000000000..a88a8b5356
--- /dev/null
+++ b/src/helpers/path.ts
@@ -0,0 +1,9 @@
+import * as windowsPath from "@std/path/windows";
+import * as posixPath from "@std/path/posix";
+import { isWindows } from "./platform";
+
+// 判定したOSにあったパス操作関数をエクスポートする。
+// NOTE: @std/pathのWindows判定は差し替えられないので、ここで判定する
+const path = isWindows ? windowsPath : posixPath;
+
+export default path;
diff --git a/src/helpers/platform.ts b/src/helpers/platform.ts
new file mode 100644
index 0000000000..9aa4547b73
--- /dev/null
+++ b/src/helpers/platform.ts
@@ -0,0 +1,30 @@
+/**
+ * コードが動いている環境を判定するためのユーティリティ。
+ * Electronのメインプロセス、レンダラープロセス、ブラウザのどこでも使用可能。
+ */
+export const isProduction = import.meta.env.MODE === "production";
+export const isElectron = import.meta.env.VITE_TARGET === "electron";
+export const isBrowser = import.meta.env.VITE_TARGET === "browser";
+
+// electronのメイン・レンダラープロセス内、ブラウザ内どこでも使用可能なOS判定
+function checkOs(os: "windows" | "mac"): boolean {
+  let isSpecifiedOs: boolean | undefined = undefined;
+  if (typeof process !== "undefined" && process?.platform) {
+    // electronのメインプロセス用
+    isSpecifiedOs =
+      process.platform === (os === "windows" ? "win32" : "darwin");
+  } else if (navigator?.userAgentData) {
+    // electronのレンダラープロセス用、Chrome系統が実装する実験的機能
+    isSpecifiedOs = navigator.userAgentData.platform.toLowerCase().includes(os);
+  } else if (navigator?.platform) {
+    // ブラウザ用、非推奨機能
+    isSpecifiedOs = navigator.platform.toLowerCase().includes(os);
+  } else {
+    // ブラウザ用、不正確
+    isSpecifiedOs = navigator.userAgent.toLowerCase().includes(os);
+  }
+  return isSpecifiedOs;
+}
+
+export const isMac = checkOs("mac");
+export const isWindows = checkOs("windows");
diff --git a/src/sing/viewHelper.ts b/src/sing/viewHelper.ts
index 106616a473..0f86b0d1ed 100644
--- a/src/sing/viewHelper.ts
+++ b/src/sing/viewHelper.ts
@@ -1,6 +1,7 @@
 import { z } from "zod";
-import { StyleInfo, isMac } from "@/type/preload";
+import { StyleInfo } from "@/type/preload";
 import { calculateHash } from "@/sing/utility";
+import { isMac } from "@/helpers/platform";
 
 const BASE_X_PER_QUARTER_NOTE = 120;
 const BASE_Y_PER_SEMITONE = 30;
diff --git a/src/store/index.ts b/src/store/index.ts
index f41298dfc8..2dd3a890c7 100644
--- a/src/store/index.ts
+++ b/src/store/index.ts
@@ -43,8 +43,8 @@ import {
   SpeakerId,
   StyleId,
   Voice,
-  isProduction,
 } from "@/type/preload";
+import { isProduction } from "@/helpers/platform";
 
 export type Store = BaseStore<State, AllGetters, AllActions, AllMutations>;
 export const storeKey: InjectionKey<Store> = Symbol();
diff --git a/src/store/project.ts b/src/store/project.ts
index 2be0be5ca6..c119ff6c85 100755
--- a/src/store/project.ts
+++ b/src/store/project.ts
@@ -1,4 +1,3 @@
-import { getBaseName } from "./utility";
 import { createPartialStore, DotNotationDispatch } from "./vuex";
 import { createUILockAction } from "@/store/ui";
 import {
@@ -8,7 +7,7 @@ import {
   ProjectStoreTypes,
 } from "@/store/type";
 import { TrackId } from "@/type/preload";
-
+import path from "@/helpers/path";
 import { getValueOrThrow, ResultError } from "@/type/result";
 import { LatestProjectType } from "@/domain/project/schema";
 import {
@@ -79,7 +78,7 @@ export const projectStore = createPartialStore<ProjectStoreTypes>({
   PROJECT_NAME_WITH_EXT: {
     getter(state) {
       return state.projectFilePath
-        ? getBaseName(state.projectFilePath)
+        ? path.basename(state.projectFilePath)
         : undefined;
     },
   },
@@ -87,7 +86,7 @@ export const projectStore = createPartialStore<ProjectStoreTypes>({
   PROJECT_NAME: {
     getter(state) {
       return state.projectFilePath
-        ? getBaseName(state.projectFilePath).replace(".vvproj", "")
+        ? path.basename(state.projectFilePath, ".vvproj")
         : undefined;
     },
   },
diff --git a/src/store/singing.ts b/src/store/singing.ts
index f558d24b01..611fe2ce22 100644
--- a/src/store/singing.ts
+++ b/src/store/singing.ts
@@ -1,4 +1,3 @@
-import path from "path";
 import { ref, toRaw } from "vue";
 import { createPartialStore } from "./vuex";
 import { createUILockAction } from "./ui";
@@ -106,6 +105,7 @@ import { ufProjectToVoicevox } from "@/sing/utaformatixProject/toVoicevox";
 import { uuid4 } from "@/helpers/random";
 import { convertToWavFileData } from "@/sing/convertToWavFileData";
 import { generateWriteErrorMessage } from "@/helpers/fileHelper";
+import path from "@/helpers/path";
 
 const logger = createLogger("store/singing");
 
diff --git a/src/store/utility.ts b/src/store/utility.ts
index 1bbe75be38..5f0ac52677 100644
--- a/src/store/utility.ts
+++ b/src/store/utility.ts
@@ -1,16 +1,14 @@
-import path from "path";
 import * as diff from "fast-array-diff";
 import {
   CharacterInfo,
   StyleInfo,
   StyleType,
   ToolbarButtonTagType,
-  isMac,
-  isWindows,
 } from "@/type/preload";
 import { AccentPhrase, Mora } from "@/openapi";
 import { cloneWithUnwrapProxy } from "@/helpers/cloneWithUnwrapProxy";
 import { DEFAULT_TRACK_NAME } from "@/sing/domain";
+import { isMac } from "@/helpers/platform";
 
 export const DEFAULT_STYLE_NAME = "ノーマル";
 export const DEFAULT_PROJECT_NAME = "Untitled";
@@ -451,31 +449,6 @@ export const getToolbarButtonName = (tag: ToolbarButtonTagType): string => {
   return tag2NameObj[tag];
 };
 
-// based on https://github.com/BBWeb/path-browserify/blob/win-version/index.js
-export const getBaseName = (filePath: string) => {
-  if (!isWindows) return path.basename(filePath);
-
-  const splitDeviceRegex =
-    /^([a-zA-Z]:|[\\/]{2}[^\\/]+[\\/]+[^\\/]+)?([\\/])?([\s\S]*?)$/;
-  const splitTailRegex =
-    /^([\s\S]*?)((?:\.{1,2}|[^\\/]+?|)(\.[^./\\]*|))(?:[\\/]*)$/;
-
-  const resultOfSplitDeviceRegex = splitDeviceRegex.exec(filePath);
-  if (
-    resultOfSplitDeviceRegex == undefined ||
-    resultOfSplitDeviceRegex.length < 3
-  )
-    return "";
-  const tail = resultOfSplitDeviceRegex[3] || "";
-
-  const resultOfSplitTailRegex = splitTailRegex.exec(tail);
-  if (resultOfSplitTailRegex == undefined || resultOfSplitTailRegex.length < 2)
-    return "";
-  const basename = resultOfSplitTailRegex[2] || "";
-
-  return basename;
-};
-
 /**
  * Macでの`command`キー、またはその他OSでの`Ctrl`キーが押されているなら`true`を返します。
  */
diff --git a/src/type/preload.ts b/src/type/preload.ts
index 7e6d141999..756d8ac379 100644
--- a/src/type/preload.ts
+++ b/src/type/preload.ts
@@ -2,33 +2,7 @@ import { z } from "zod";
 import { IpcSOData } from "./ipc";
 import { AltPortInfos } from "@/store/type";
 import { Result } from "@/type/result";
-
-export const isProduction = import.meta.env.MODE === "production";
-export const isElectron = import.meta.env.VITE_TARGET === "electron";
-export const isBrowser = import.meta.env.VITE_TARGET === "browser";
-
-// electronのメイン・レンダラープロセス内、ブラウザ内どこでも使用可能なOS判定
-function checkOs(os: "windows" | "mac"): boolean {
-  let isSpecifiedOs: boolean | undefined = undefined;
-  if (process?.platform) {
-    // electronのメインプロセス用
-    isSpecifiedOs =
-      process.platform === (os === "windows" ? "win32" : "darwin");
-  } else if (navigator?.userAgentData) {
-    // electronのレンダラープロセス用、Chrome系統が実装する実験的機能
-    isSpecifiedOs = navigator.userAgentData.platform.toLowerCase().includes(os);
-  } else if (navigator?.platform) {
-    // ブラウザ用、非推奨機能
-    isSpecifiedOs = navigator.platform.toLowerCase().includes(os);
-  } else {
-    // ブラウザ用、不正確
-    isSpecifiedOs = navigator.userAgent.toLowerCase().includes(os);
-  }
-  return isSpecifiedOs;
-}
-
-export const isMac = checkOs("mac");
-export const isWindows = checkOs("windows");
+import { isMac } from "@/helpers/platform";
 
 const urlStringSchema = z.string().url().brand("URL");
 export type UrlString = z.infer<typeof urlStringSchema>;
diff --git a/tests/unit/composable/useModifierKey.spec.ts b/tests/unit/composable/useModifierKey.spec.ts
index 7d259b6125..c27a2912f3 100644
--- a/tests/unit/composable/useModifierKey.spec.ts
+++ b/tests/unit/composable/useModifierKey.spec.ts
@@ -5,7 +5,7 @@ import {
   useShiftKey,
 } from "@/composables/useModifierKey";
 
-import { isMac } from "@/type/preload";
+import { isMac } from "@/helpers/platform";
 
 describe("useModifierKey", () => {
   // テスト用のコンポーネント
diff --git a/tests/unit/domain/project.spec.ts b/tests/unit/domain/project.spec.ts
index c9d85555ab..ace7ede398 100644
--- a/tests/unit/domain/project.spec.ts
+++ b/tests/unit/domain/project.spec.ts
@@ -1,8 +1,8 @@
-import path from "path";
 import fs from "fs";
 import { migrateProjectFileObject } from "@/domain/project";
 import { EngineId, SpeakerId, StyleId } from "@/type/preload";
 import { resetMockMode } from "@/helpers/random";
+import path from "@/helpers/path";
 
 const engineId = EngineId("074fc39e-678b-4c13-8916-ffca8d505d1d");
 
@@ -15,7 +15,7 @@ beforeEach(() => {
 describe("migrateProjectFileObject", () => {
   test("v0.14.11", async () => {
     // ８期生のプロジェクトファイル
-    const vvprojFile = path.resolve(vvprojDir, "0.14.11.vvproj");
+    const vvprojFile = path.join(vvprojDir, "0.14.11.vvproj");
     const projectData: unknown = JSON.parse(
       fs.readFileSync(vvprojFile, "utf-8"),
     );
diff --git a/tests/unit/store/utility.spec.ts b/tests/unit/store/utility.spec.ts
index cb6430de9e..92c43b7a2f 100644
--- a/tests/unit/store/utility.spec.ts
+++ b/tests/unit/store/utility.spec.ts
@@ -5,7 +5,6 @@ import {
   SpeakerId,
   StyleId,
   ToolbarButtonTagType,
-  isMac,
 } from "@/type/preload";
 import {
   formatCharacterStyleName,
@@ -18,11 +17,11 @@ import {
   isAccentPhrasesTextDifferent,
   buildAudioFileNameFromRawData,
   getToolbarButtonName,
-  getBaseName,
   isOnCommandOrCtrlKeyDown,
   filterCharacterInfosByStyleType,
 } from "@/store/utility";
 import { uuid4 } from "@/helpers/random";
+import { isMac } from "@/helpers/platform";
 
 function createDummyMora(text: string): Mora {
   return {
@@ -282,13 +281,6 @@ test("getToolbarButtonName", () => {
   );
 });
 
-test("getBaseName", () => {
-  expect(getBaseName("/path/to/file.txt")).toBe("file.txt");
-  expect(getBaseName("/path/to/file")).toBe("file");
-  expect(getBaseName("file.txt")).toBe("file.txt");
-  expect(getBaseName("file")).toBe("file");
-});
-
 test("isOnCommandOrCtrlKeyDown", () => {
   expect(isOnCommandOrCtrlKeyDown({ metaKey: true, ctrlKey: false })).toBe(
     isMac,
diff --git a/vite.config.mts b/vite.config.mts
index 3feac36d7e..3764bba08b 100644
--- a/vite.config.mts
+++ b/vite.config.mts
@@ -1,25 +1,20 @@
 /// <reference types="vitest" />
 import path from "path";
 import { rm } from "fs/promises";
-import { fileURLToPath } from "url";
 
 import electron from "vite-plugin-electron";
 import tsconfigPaths from "vite-tsconfig-paths";
 import vue from "@vitejs/plugin-vue";
 import checker from "vite-plugin-checker";
-import { nodePolyfills } from "vite-plugin-node-polyfills";
 import { BuildOptions, defineConfig, loadEnv, Plugin } from "vite";
 import { quasar } from "@quasar/vite-plugin";
 
-const __filename = fileURLToPath(import.meta.url);
-const __dirname = path.dirname(__filename);
-
 const isElectron = process.env.VITE_TARGET === "electron";
 const isBrowser = process.env.VITE_TARGET === "browser";
 
 export default defineConfig((options) => {
   const packageName = process.env.npm_package_name;
-  const env = loadEnv(options.mode, __dirname);
+  const env = loadEnv(options.mode, import.meta.dirname);
   if (!packageName?.startsWith(env.VITE_APP_NAME)) {
     throw new Error(
       `"package.json"の"name":"${packageName}"は"VITE_APP_NAME":"${env.VITE_APP_NAME}"から始まっている必要があります`,
@@ -38,7 +33,7 @@ export default defineConfig((options) => {
   }
   process.env.VITE_7Z_BIN_NAME =
     (options.mode === "development"
-      ? path.join(__dirname, "build", "vendored", "7z") + path.sep
+      ? path.join(import.meta.dirname, "build", "vendored", "7z") + path.sep
       : "") + sevenZipBinName;
   process.env.VITE_APP_VERSION = process.env.npm_package_version;
 
@@ -52,33 +47,30 @@ export default defineConfig((options) => {
     options.mode === "test" || process.env.SKIP_LAUNCH_ELECTRON === "1";
 
   return {
-    root: path.resolve(__dirname, "src"),
-    envDir: __dirname,
+    root: path.resolve(import.meta.dirname, "src"),
+    envDir: import.meta.dirname,
     build: {
-      outDir: path.resolve(__dirname, "dist"),
+      outDir: path.resolve(import.meta.dirname, "dist"),
       chunkSizeWarningLimit: 10000,
       sourcemap,
     },
-    publicDir: path.resolve(__dirname, "public"),
+    publicDir: path.resolve(import.meta.dirname, "public"),
     css: {
       preprocessorOptions: {
         scss: {
           api: "modern",
-          includePaths: [path.resolve(__dirname, "node_modules")],
+          includePaths: [path.resolve(import.meta.dirname, "node_modules")],
         },
       },
     },
     resolve: {
       alias: {
-        "@": path.resolve(__dirname, "src/"),
+        "@": path.resolve(import.meta.dirname, "src/"),
       },
     },
     plugins: [
       vue(),
       quasar({ autoImportComponentCase: "pascal" }),
-      nodePolyfills({
-        include: ["path"],
-      }),
       options.mode !== "test" &&
         checker({
           overlay: false,
@@ -100,9 +92,9 @@ export default defineConfig((options) => {
               }
             },
             vite: {
-              plugins: [tsconfigPaths({ root: __dirname })],
+              plugins: [tsconfigPaths({ root: import.meta.dirname })],
               build: {
-                outDir: path.resolve(__dirname, "dist"),
+                outDir: path.resolve(import.meta.dirname, "dist"),
                 sourcemap,
               },
             },
@@ -116,9 +108,9 @@ export default defineConfig((options) => {
               }
             },
             vite: {
-              plugins: [tsconfigPaths({ root: __dirname })],
+              plugins: [tsconfigPaths({ root: import.meta.dirname })],
               build: {
-                outDir: path.resolve(__dirname, "dist"),
+                outDir: path.resolve(import.meta.dirname, "dist"),
                 sourcemap,
                 rollupOptions: {
                   output: { inlineDynamicImports: true },
@@ -138,7 +130,7 @@ const cleanDistPlugin = (): Plugin => {
     apply: "build",
     enforce: "pre",
     async buildStart() {
-      await rm(path.resolve(__dirname, "dist"), {
+      await rm(path.resolve(import.meta.dirname, "dist"), {
         recursive: true,
         force: true,
       });