Angular 5应用程序在Firefox v48.0.1或<50.0中不工作

由于项目范围的原因,我正在尝试在旧版本的浏览器中运行角度应用程序。应用程序在最新版本和Chrome中工作正常。似乎是IE10和Mozilla Firefox(Firefox版本<50)的问题。我正在用48.0.1运行我的应用程序,我在控制台上得到了一个简单的一行程序问题。

类型错误:未定义 就这样。

我尝试用谷歌搜索,发现了一个类似的GitHub问题。

这是我找到的关闭解决方案。 https://github.com/angular/angular-cli/issues/9340

我尝试遵循与uglifyjs webpack插件相关的步骤,并将其移动到以前的版本1.1.5。我也用这些命令试过了。

npm i uglifyjs-webpack-plugin@1.1.5 --save-exact
rm -rf package-lock.json node_modules
npm install

现在的问题是,我仍然可以在package-lock.json文件中看到其他版本1.2.5和0.4.6。我手动删除了它,但仍然没有解决方案。

包.json

"dependencies": {
    ...
    "uglifyjs-webpack-plugin": "1.1.5",
}

package-lock.json软件包

"@angular/cli": {

    "dependencies": {

        "requires": {
            ...
            "uglifyjs-webpack-plugin": "1.2.5",
        }
        "uglifyjs-webpack-plugin": {
          "version": "1.2.5",
          "resolved": "https://registry.npmjs.org/uglifyjs-webpack-plugin/-/uglifyjs-webpack-plugin-1.2.5.tgz",
          "integrity": "sha512-hIQJ1yxAPhEA2yW/i7Fr+SXZVMp+VEI3d42RTHBgQd2yhp/1UdBcR3QEWPV5ahBxlqQDMEMTuTEvDHSFINfwSw==",
          "dev": true,
          "requires": {
            "cacache": "10.0.4",
            "find-cache-dir": "1.0.0",
            "schema-utils": "0.4.5",
            "serialize-javascript": "1.5.0",
            "source-map": "0.6.1",
            "uglify-es": "3.3.9",
            "webpack-sources": "1.1.0",
            "worker-farm": "1.6.0"
          },
          "dependencies": {
            "source-map": {
              "version": "0.6.1",
              "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
              "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
              "dev": true
            }
          }
        }

        ....

        "uglifyjs-webpack-plugin": {
          "version": "1.1.5",
          "resolved": "https://registry.npmjs.org/uglifyjs-webpack-plugin/-/uglifyjs-webpack-plugin-1.1.5.tgz",
          "integrity": "sha512-YBGc9G7dv12Vjx8vUQs54DZgAXVf04LlG6dNNiEbTZjL3PbUqiY4uPB9Kv+fUJaqRskEGva/lS7sh08yJr7jnA==",
          "requires": {
            "cacache": "10.0.4",
            "find-cache-dir": "1.0.0",
            "schema-utils": "0.3.0",
            "serialize-javascript": "1.5.0",
            "source-map": "0.6.1",
            "uglify-es": "3.2.2",
            "webpack-sources": "1.1.0",
            "worker-farm": "1.6.0"
          }
        },

        "webpack": {
            "requires": {
                "uglifyjs-webpack-plugin": "0.4.6",
            }
            "dependencies": {
                "uglifyjs-webpack-plugin": {
                  "version": "0.4.6",
                  "resolved": "https://registry.npmjs.org/uglifyjs-webpack-plugin/-/uglifyjs-webpack-plugin-0.4.6.tgz",
                  "integrity": "sha1-uVH0q7a9YX5m9j64kUmOORdj4wk=",
                  "dev": true,
                  "requires": {
                    "source-map": "0.5.7",
                    "uglify-js": "2.8.29",
                    "webpack-sources": "1.1.0"
                  }
                },
            }
        }

    }
}

我能得到的任何想法或帮助。这对项目来说是至关重要的。

事先谢谢。