安装gulp时找不到模块through2

Question

如果我运行gulp命令，上面的错误就会出现。当我运行gulp命令时，我不知道我的代码中发生了什么。

module.js :339
    throw err;
    ^

Error: Cannot find module 'through2'
    at Function.Module._resolveFilename (module.js:337:15)
    at Function.Module._load (module.js:287:25)
    at Module.require (module.js:366:17)
    at require (module.js:385:17)
    at Object.<anonymous> (E:\Project\wamp\www\gulpTest\node_modules\laravel-elixir\node_modules\gulp-notify\lib\extra_api.js:1:77)
    at Module._compile (module.js:435:26)
    at Object.Module._extensions..js (module.js:442:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:311:12)
    at Module.require (module.js:366:17)

Gulpfile.js

    var gulp = require('gulp'),  
    less = require('gulp-less'),
    sass = require('gulp-sass'),
    minify = require('gulp-minify-css'),
    concat = require('gulp-concat'),
    uglify = require('gulp-uglify'),
    rename = require('gulp-rename'),
    notify = require('gulp-notify'),
    growl = require('gulp-notify-growl'),
    phpunit = require('gulp-phpunit');
 var paths = {  
    'dev': {
        'less': './resources/assets/less/',
        'js': './resources/assets/js/',
        'vendor': './resources/assets/vendor/'
    },
    'production': {
        'css': './public/assets/css/',
        'js': './public/assets/js/'
    }
};

/*
 |--------------------------------------------------------------------------
 | Elixir Asset Management
 |--------------------------------------------------------------------------
 |
 | Elixir provides a clean, fluent API for defining some basic Gulp tasks
 | for your Laravel application. By default, we are compiling the Less
 | file for our application, as well as publishing vendor resources.
 |
 */



// CSS
gulp.task('css', function() {  
  return gulp.src(paths.dev.less+'app.less')
    .pipe(less())
    .pipe(gulp.dest(paths.production.css))
    .pipe(minify({keepSpecialComments:0}))
    .pipe(rename({suffix: '.min'}))
    .pipe(gulp.dest(paths.production.css));
});

// JS
gulp.task('js', function(){  
  return gulp.src([
      paths.dev.vendor+'jquery/dist/jquery.js',
      paths.dev.vendor+'bootstrap/dist/js/bootstrap.js',
      paths.dev.js+'js'
    ])
    .pipe(concat('app.min.js'))
    .pipe(uglify())
    .pipe(gulp.dest(paths.production.js));
});

// PHP Unit
gulp.task('phpunit', function() {  
  var options = {debug: false, notify: true};
  return gulp.src('./tests/*.php')
    .pipe(phpunit('./vendor/bin/phpunit', options))

    .on('error', notify.onError({
      title: 'PHPUnit Failed',
      message: 'One or more tests failed.'
    }))

    .pipe(notify({
      title: 'PHPUnit Passed',
      message: 'All tests passed!'
    }));
});
gulp.task('watch', function() {  
  gulp.watch(paths.dev.less + '/*.less', ['css']);
  gulp.watch(paths.dev.js + '/*.js', ['js']);
  gulp.watch('./tests/*.php', ['phpunit']);
});
gulp.task('default', ['css', 'js', 'phpunit', 'watch']);  

上面是gulp文件。如果我只使用elixir，它会显示problem.Above是gulp文件。如果我只使用elixir，它会显示problem.Above是gulp文件。如果我只使用长生不老药，就会显示出问题。

Answer 1

您应该首先确保package.json中包含through2。如果不是，则运行npm --save-dev through2。

如果它在你的package.json中，运行npm install以确保它被拉入。

如果已安装，请检查您的gulpfile.js中是否安装了require('through2')。