Cloud9のLaravel6の環境下にてjavascriptを実行するためにいろいろ設定します

cross-env.jsのパス
node_modules/cross-env/src/bin/cross-env.js
```

package.jsonのscript内のエイリアスを修正
"cross-env"と明記されているところへ

```
node node_modules/cross-env/src/bin/cross-env.js
```
を上書きする。

```qiita:package.json変更前
"scripts": {
        "dev": "npm run development",
        "development": "cross-env NODE_ENV=development node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
        "watch": "npm run development -- --watch",
        "watch-poll": "npm run watch -- --watch-poll",
        "hot": "cross-env  NODE_ENV=development node_modules/webpack-dev-server/bin/webpack-dev-server.js --inline --hot --config=node_modules/laravel-mix/setup/webpack.config.js",
        "prod": "npm run production",
        "production": "cross-env  NODE_ENV=production node_modules/webpack/bin/webpack.js --no-progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js"
    },
```

実際のcross-env.jsへのパスを上書きする。(3項目)
`cross-env` → `node node_modules/cross-env/src/bin/cross-env.js`
・development
・hot
・production


```qiita:package.json変更後
 "scripts": {
        "dev": "npm run development",
        "development": "node node_modules/cross-env/src/bin/cross-env.js NODE_ENV=development node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
        "watch": "npm run development -- --watch",
        "watch-poll": "npm run watch -- --watch-poll",
        "hot": "node node_modules/cross-env/src/bin/cross-env.js NODE_ENV=development node_modules/webpack-dev-server/bin/webpack-dev-server.js --inline --hot --config=node_modules/laravel-mix/setup/webpack.config.js",
        "prod": "npm run production",
        "production": "node node_modules/cross-env/src/bin/cross-env.js NODE_ENV=production node_modules/webpack/bin/webpack.js --no-progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js"
    },

```