我在Homestead流浪者盒子上运行Laravel 5.4。我已经使用npm install命令安装了所有npm依赖项。那没有产生任何错误。
在我的webpack.min.js文件中，我有：
const { mix } = require('laravel-mix');
/*
|--------------------------------------------------------------------------
| Mix Asset Management
|--------------------------------------------------------------------------
|
| Mix provides a clean, fluent API for defining some Webpack build steps
| for your Laravel application. By default, we are compiling the Sass
| file for the application as well as bundling up all the JS files.
|
*/
mix.js([
'resources/assets/plugins/jquery-1.11.3.min.js',
'resources/assets/plugins/bootstrap/js/bootstrap.min.js',
'resources/assets/js/main.js'
], 'public/js'
);
mix.combine([
'resources/assets/plugins/bootstrap/css/bootstrap.min.css',
'resources/assets/plugins/font-awesome/css/font-awesome.css',
'resources/assets/css/styles.css'
], 'public/css/all.css');
当我要运行时npm run production，出现以下错误：
> @ production /home/vagrant/projects/nielsvroman
> node node_modules/cross-env/bin/cross-env.js NODE_ENV=production node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js
/home/vagrant/projects/nielsvroman/node_modules/laravel-mix/setup/webpack.config.js:120
let extractPlugin = new plugins.ExtractTextPlugin(
^^^
SyntaxError: Block-scoped declarations (let, const, function, class) not yet supported outside strict mode
at exports.runInThisContext (vm.js:53:16)
at Module._compile (module.js:404:25)
at Object.Module._extensions..js (module.js:432:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:311:12)
at Module.require (module.js:366:17)
at require (module.js:385:17)
at requireConfig (/home/vagrant/projects/nielsvroman/node_modules/webpack/bin/convert-argv.js:96:18)
at /home/vagrant/projects/nielsvroman/node_modules/webpack/bin/convert-argv.js:109:17
at Array.forEach (native)
npm ERR! Linux 3.19.0-25-generic
npm ERR! argv "/usr/bin/nodejs" "/usr/bin/npm" "run" "production"
npm ERR! node v5.0.0
npm ERR! npm v3.3.6
npm ERR! code ELIFECYCLE
npm ERR! @ production: `node node_modules/cross-env/bin/cross-env.js NODE_ENV=production node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the @ production script 'node node_modules/cross-env/bin/cross-env.js NODE_ENV=production node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js'.
npm ERR! This is most likely a problem with the package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! node node_modules/cross-env/bin/cross-env.js NODE_ENV=production node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js
npm ERR! You can get their info via:
npm ERR! npm owner ls
npm ERR! There is likely additional logging output above.
npm ERR! Please include the following file with any support request:
npm ERR! /home/vagrant/projects/nielsvroman/npm-debug.log
这可能是什么问题？
我在NodeJS中使用其中一个测试脚本遇到了相同的问题，并且通过使用ECMAScript 5的严格模式解决了我的错误。
在脚本的上方添加了以上代码，效果很好。
严格模式对常规JavaScript语义进行了几处更改：
通过将它们更改为引发错误来消除一些JavaScript静默错误。
修复了使JavaScript引擎难以执行优化的错误：严格模式代码有时可以比非严格模式下的相同代码运行得更快。
禁止在将来的ECMAScript版本中定义某些语法。