第一个坑，cross-env目录不对
sh: node_modules/cross-env/bin/cross-env.js: No such file or directory我查了一下cross-env.js的路径，发现它是在node_modules/cross-env/dist/bin下面而不是node_modules/cross-env/bin下面。
修改方案是修改package.json下面的node_modules/cross-env/bin/cross-env.js为node_modules/cross-env/dist/bin/cross-env.js
第二个坑，laravel-mix版本太低
fallbackLoader option has been deprecated - replace with "fallback"
loader option has been deprecated - replace with "use"
Invalid configuration object. Webpack has been initialised using a configuration object that does not match the API schema.
- configuration.output.path: The provided value "public" is not an absolute path!要把package.json里面laravel-mix版本改成
"laravel-mix": "^0.10.0",然后再执行
npm install