Grunt imagemin error: Cannot read property 'contents' of undefined

Question

G运行t imagemin 在我尝试运行时抛出以下错误：

Running "imagemin:dynamic" (imagemin) task
Fatal error: Cannot read property 'contents' of undefined

这是我的 package.json 文件：

{
  "name": "project1",
  "version": "0.1.0",
  "devDependencies": {
    "grunt": "~0.4.1",
    "grunt-contrib-imagemin": "^1.0.0",
    "grunt-contrib-uglify": "^0.11.0",
    "imagemin" : "4.0.0"
  }
}

这是我的 Gruntfile.js

module.exports = function(grunt) {

    grunt.initConfig({

        pkg: grunt.file.readJSON('package.json'),

        uglify: {
          build: {
            src: 'views/js/src/main.js',
            dest: 'views/js/build/main.js'
          }
        },

        imagemin: {
          dynamic: {
            files: [{
              expand: true,
              cwd: 'views/images/src/',
              src: ['**/*.{png,jpg,gif}'],
              dest: 'views/images/build/'
            }]
          }
        }

    });

    // 3. Where we tell Grunt we plan to use this plug-in.
    grunt.loadNpmTasks('grunt-contrib-uglify');
    grunt.loadNpmTasks('grunt-contrib-imagemin');

    // 4. Where we tell Grunt what to do when we type "grunt" into the terminal.
    grunt.registerTask('default', ['uglify', 'imagemin']);

};

此问题是 flagged and evidently resolved 以前版本的 imagemin 中的问题。但是商定的解决方案是将 g运行t-contrib-imagemin 更新到版本 1.0.0 并将 imagemin 更新到 4.0.0，我已经完成了，但仍然无法正常工作。

Answer 1

我通过将 package.json 中的 grunt-contrib-imagemin 更改为 grunt-contrib-imagemin": "0.9.1"

解决了这个问题

Answer 2

GitHub 解决方案 (https://github.com/gruntjs/grunt-contrib-imagemin/issues/344) 不是降级 grunt-contrib-imagemin，而是在 package.json.

中添加 "vinyl-fs": "2.2.1"

vinyl-fs 似乎在依赖树中的任何地方。但是 vinyl-fs 从 2.2.1 到 2.3.0 有一个重大的版本更改，这将阻止构建过程。所以版本应该是"forced"到2.2.1.

Answer 3

我的工作是将 grunt-contrib-imagemin 更新到版本 ^1.0.0 并添加依赖项 imagemin 版本 ^4.0.0 和 vinyl-fs 版本 ^2.1.1

Answer 4

只需将 gurnt-contrib-imagemin 更新到 1.0.0 或最新版本，您的旧版本可能是 0。9.x

Grunt imagemin error: Cannot read property 'contents' of undefined

Grunt imagemin error: Cannot read property 'contents' of undefined

javascript

gruntjs

grunt-contrib-imagemin

imagemin