webpack babel在IE 11之前

Question

我在webpack中使用babel polyfill来转换代码。我很惊讶IE 11显示错误：IE 11 Object doesn't support property or method 'prepend'不是pollyfill应该添加此功能？我知道有一些重复，我只是不知道如何配置webpack。我尝试了几种方法，但我必须手动添加前置函数，以便IE找到它。

与babel相关的包裹：

"devDependencies": {
  "@babel/core": "^7.2.2",
  "@babel/plugin-syntax-dynamic-import": "^7.2.0",
  "@babel/preset-env": "^7.3.1",
  "ajv": "^6.7.0",
  "autoprefixer": "^9.4.6",
  "babel-loader": "^8.0.5",
  "breakpoint-sass": "^2.7.1",
  "browserslist": "^4.4.1",
  "clean-webpack-plugin": "^1.0.1",
  "copy-webpack-plugin": "^4.6.0",
  "css-loader": "^2.1.0"
}

webpack.config.js：

module.exports = ( env, options ) => {
return {
entry        : ['@babel/polyfill', './source/_assets/app.js'],
output       : {
  path          : path.resolve( __dirname, 'public/dist' ),
  filename      : 'bundle.js',
  chunkFilename : '[name].bundle.js',
  publicPath    : ( options.mode === 'production' ) ? '/themes/custom/avonis/public/dist/' : '../../dist/'
}, ...
{
      test    : /.js$/,
      exclude : /node_modules/,
      use     : {
        loader  : 'babel-loader',
        options : {
          presets : [ '@babel/preset-env' ],
          plugins : [ '@babel/plugin-syntax-dynamic-import' ]
        }
      }
    },

我在条目文件app.js中添加了这样的功能

(function (arr) {
arr.forEach(function (item) {
    if (item.hasOwnProperty('append')) {
        return;
    }
    Object.defineProperty(item, 'append', {
        configurable: true,
        enumerable: true,
        writable: true,
        value: function append() {
            var argArr = Array.prototype.slice.call(arguments),
                docFrag = document.createDocumentFragment();

            argArr.forEach(function (argItem) {
                var isNode = argItem instanceof Node;
                docFrag.appendChild(isNode ? argItem : document.createTextNode(String(argItem)));
            });

            this.appendChild(docFrag);
        }
    });
});
})([Element.prototype, Document.prototype DocumentFragment.prototype]);