What to do with IE11: "Object does not support assign property or method"?

Question

JavaScript

Object doesn't support assign property or method

There seems to be answers on the net, but nothing helped. Maybe the swiper slider uses ES6 here is the .babelrc

file

{
    "presets": ["@babel/preset-env"],
    "plugins": ["@babel/plugin-transform-object-assign"]
}

webpack.config.js

const path = require('path');

module.exports = {
  mode: process.env.NODE_ENV, // development не сжатый а продакшн сжатый
  entry: ['./scripts/main.js'],
  module: {
    rules: [
      {
        exclude: [/node_modules\/(?!(swiper|dom7)\/).*/, /\.test\.jsx?$/],
        test: /\.jsx?$/,
        use: [{ loader: 'babel-loader' }],
      }
    ]
  },
  output: {
    filename: '[name].js',
    path: path.resolve(__dirname, 'www/scripts')
  }
};

package.json

{
  "name": "gulp",
  "version": "1.0.0",
  "main": "index.js",
  "browserslist": [
    "> 1%",
    "not ie < 11",
    "not OperaMini all"
  ],
  "license": "MIT",
  "scripts": {
    "dev": "cross-env NODE_ENV=development gulp dev",
    "build": "cross-env NODE_ENV=production gulp build"
  },
  "devDependencies": {
    "@babel/core": "^7.1.2",
    "@babel/plugin-transform-object-assign": "^7.8.3",
    "@babel/plugin-transform-property-mutators": "^7.8.3",
    "@babel/preset-env": "^7.1.0",
    "babel-loader": "^8.0.4",
    "browser-sync": "^2.24.7",
    "cross-env": "^5.1.5",
    "csso": "^3.5.1",
    "eslint": "^5.4.0",
    "gulp": "^4.0.0",
    "nunjucks": "^3.1.3",
    "postcss": "^7.0.2",
    "postcss-easy-import": "^3.0.0",
    "postcss-mixins": "^6.2.0",
    "postcss-nested": "^3.0.0",
    "postcss-object-fit-images": "^1.1.2",
    "postcss-preset-env": "^5.3.0",
    "prettier": "1.14.2",
    "request": "^2.88.0",
    "stylelint": "^9.4.0",
    "svg-sprite": "^1.4.0",
    "svgo": "^1.1.1",
    "webpack": "^4.23.1"
  },
  "dependencies": {
    "lozad": "^1.9.0",
    "object-fit-images": "^3.2.4",
    "svgxuse": "^1.2.6",
    "swiper": "^5.3.1",
    "web-animations-js": "^2.3.1"
  }
}

Answer 1

"browserslist": [
"> 1%",
"not ie <= 11",
"not ie_mob > 0",
"not OperaMini all"
],
have you tried that?
Here you can check