Internet Explorer 11、Angular 8 和 SocketIO 兼容性

Question

伙计们，我一直在搜索这个主题，到目前为止，我使用所有这些指南和 pollyfills 使 ie11 在 angular 8 上工作。

但是当我尝试添加 socketio 时，它在 IE11 上崩溃了，并且控制台显示

SCRIPT1002: Syntax error 
File: vendor.js, Line: 70528, Column: 40

这是供应商代码

// The final "%c" is somewhat tricky, because there could be other
    // arguments passed either before or after the %c, so we need to
    // figure out the correct index to insert the CSS into
    let index = 0;
    let lastC = 0;
    args[0].replace(/%[a-zA-Z%]/g, match => {
        if (match === '%%') {
            return;
        } ... it goes and goes

我已经尝试了我发现的所有东西，但仍然没有得到任何线索，在 vendor.js 中它似乎与 css 有关，但是当我在 [中添加 socketio 时它会触发=40=].

我不太了解 angular 和浏览器的内部结构，我对 IE 和 Pollyfills 的支持相对较新，但在我的工作中需要。

你们知道我应该采取什么方法来解决这个问题。我没有找到更多关于这个问题的信息，据我了解 IE11 支持 websocket API.

这里是 angualar.json、pollyfills.ts 和 tsconfig.js

注意：它在 chrome、firefox、safari 上运行良好。

{
  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
  "version": 1,
  "newProjectRoot": "projects",
  "projects": {
    "test": {
      "projectType": "application",
      "schematics": {},
      "root": "",
      "sourceRoot": "src",
      "prefix": "app",
      "architect": {
        "build": {
          "builder": "@angular-devkit/build-angular:browser",
          "options": {
            "outputPath": "dist/test",
            "index": "src/index.html",
            "main": "src/main.ts",
            "polyfills": "src/polyfills.ts",
            "tsConfig": "tsconfig.app.json",
            "aot": false,
            "assets": [
              "src/favicon.ico",
              "src/assets"
            ],
            "styles": [
              "src/styles.css"
            ],
            "scripts": []
          },
          "configurations": {
            "production": {
              "fileReplacements": [
                {
                  "replace": "src/environments/environment.ts",
                  "with": "src/environments/environment.prod.ts"
                }
              ],
              "optimization": true,
              "outputHashing": "all",
              "sourceMap": false,
              "extractCss": true,
              "namedChunks": false,
              "aot": true,
              "extractLicenses": true,
              "vendorChunk": false,
              "buildOptimizer": true,
              "budgets": [
                {
                  "type": "initial",
                  "maximumWarning": "2mb",
                  "maximumError": "5mb"
                },
                {
                  "type": "anyComponentStyle",
                  "maximumWarning": "6kb",
                  "maximumError": "10kb"
                }
              ]
            }
          }
        },
        "serve": {
          "builder": "@angular-devkit/build-angular:dev-server",
          "options": {
            "browserTarget": "test:build"
          },
          "configurations": {
            "production": {
              "browserTarget": "test:build:production"
            }
          }
        },
        "extract-i18n": {
          "builder": "@angular-devkit/build-angular:extract-i18n",
          "options": {
            "browserTarget": "test:build"
          }
        },
        "test": {
          "builder": "@angular-devkit/build-angular:karma",
          "options": {
            "main": "src/test.ts",
            "polyfills": "src/polyfills.ts",
            "tsConfig": "tsconfig.spec.json",
            "karmaConfig": "karma.conf.js",
            "assets": [
              "src/favicon.ico",
              "src/assets"
            ],
            "styles": [
              "src/styles.css"
            ],
            "scripts": []
          }
        },
        "lint": {
          "builder": "@angular-devkit/build-angular:tslint",
          "options": {
            "tsConfig": [
              "tsconfig.app.json",
              "tsconfig.spec.json",
              "e2e/tsconfig.json"
            ],
            "exclude": [
              "**/node_modules/**"
            ]
          }
        },
        "e2e": {
          "builder": "@angular-devkit/build-angular:protractor",
          "options": {
            "protractorConfig": "e2e/protractor.conf.js",
            "devServerTarget": "test:serve"
          },
          "configurations": {
            "production": {
              "devServerTarget": "test:serve:production"
            }
          }
        }
      }
    }},
  "defaultProject": "test"
}

/**
 * This file includes polyfills needed by Angular and is loaded before the app.
 * You can add your own extra polyfills to this file.
 *
 * This file is divided into 2 sections:
 *   1. Browser polyfills. These are applied before loading ZoneJS and are sorted by browsers.
 *   2. Application imports. Files imported after ZoneJS that should be loaded before your main
 *      file.
 *
 * The current setup is for so-called "evergreen" browsers; the last versions of browsers that
 * automatically update themselves. This includes Safari >= 10, Chrome >= 55 (including Opera),
 * Edge >= 13 on the desktop, and iOS 10 and Chrome on mobile.
 *
 * Learn more in https://angular.io/guide/browser-support
 */

/***************************************************************************************************
 * BROWSER POLYFILLS
 */

/** IE9, IE10 and IE11 requires all of the following polyfills. **/


/** IE10 and IE11 requires the following for NgClass support on SVG elements */
import 'classlist.js';  // Run `npm install --save classlist.js`.

/**
 * Web Animations `@angular/platform-browser/animations`
 * Only required if AnimationBuilder is used within the application and using IE/Edge or Safari.
 * Standard animation support in Angular DOES NOT require any polyfills (as of Angular 6.0).
 */
import 'web-animations-js';  // Run `npm install --save web-animations-js`.

/**
 * By default, zone.js will patch all possible macroTask and DomEvents
 * user can disable parts of macroTask/DomEvents patch by setting following flags
 * because those flags need to be set before `zone.js` being loaded, and webpack
 * will put import in the top of bundle, so user need to create a separate file
 * in this directory (for example: zone-flags.ts), and put the following flags
 * into that file, and then add the following code before importing zone.js.
 * import './zone-flags.ts';
 *
 * The flags allowed in zone-flags.ts are listed here.
 *
 * The following flags will work for all browsers.
 *
 * (window as any).__Zone_disable_requestAnimationFrame = true; // disable patch requestAnimationFrame
 * (window as any).__Zone_disable_on_property = true; // disable patch onProperty such as onclick
 * (window as any).__zone_symbol__UNPATCHED_EVENTS = ['scroll', 'mousemove']; // disable patch specified eventNames
 *
 *  in IE/Edge developer tools, the addEventListener will also be wrapped by zone.js
 *  with the following flag, it will bypass `zone.js` patch for IE/Edge
 *
 *  (window as any).__Zone_enable_cross_context_check = true;
 *
 */

/***************************************************************************************************
 * Zone JS is required by default for Angular itself.
 */
// import './zone-flags.ts';
import 'zone.js/dist/zone';  // Included with Angular CLI.


/***************************************************************************************************
 * APPLICATION IMPORTS
 */

{
  "compileOnSave": false,
  "compilerOptions": {
    "baseUrl": "./",
    "outDir": "./dist/out-tsc",
    "sourceMap": true,
    "declaration": false,
    "downlevelIteration": true,
    "experimentalDecorators": true,
    "module": "esnext",
    "moduleResolution": "node",
    "importHelpers": true,
    "target": "es5",
    "typeRoots": [
      "node_modules/@types"
    ],
    "lib": [
      "es2018",
      "dom"
    ]
  },
  "angularCompilerOptions": {
    "fullTemplateTypeCheck": true,
    "strictInjectionParameters": true
  }
}

# This file is used by the build system to adjust CSS and JS output to support the specified browsers below.
# For additional information regarding the format and rule options, please see:
# https://github.com/browserslist/browserslist#queries

# You can see what browsers were selected by your queries by running:
#   npx browserslist

> 0.5%
last 2 versions
Firefox ESR
not dead
IE 9-11 # For IE 9-11 support, remove 'not'.

------------------------ 编辑

import { SocketIoModule, SocketIoConfig } from 'ngx-socket-io';

const config: SocketIoConfig = { url: 'http://localhost:3000', options: {} };

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    SocketIoModule.forRoot(config) <--- this import fires ie11 error
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }
```

Answer 1

刚刚通过将 socket.io-client 软件包降级到 package.json 中的版本 ~2.2.0 解决了同样的问题。

似乎从版本 2.3 开始，由于依赖项升级，ES5 支持已丢失。有关详细信息，请参阅此 link： https://github.com/socketio/socket.io-client/issues/1328

感谢您发布此信息 - 您帮助我确定了我自己的应用程序中的问题。

Answer 2

请不要将 socket.io-client 软件包降级到 2.2.0，因为存在内存泄漏： Per-Message Deflate Memory Leak #1617

最初的问题来自软件包 debug。 @socketio 的核心提交者 Damien Arrachequesne 建议使用 webpack-remove-debug 插件，直到“更好”的解决方案获得批准： Please note that you can also use the webpack-remove-debug plugin...

你可以在这里找到它webpack-remove-debug

安装

npm install --save-dev webpack-remove-debug

配置

在您的 Webpack 1 配置中：

{
    module: {
        loaders: [
            {
                test: /\.js$/,
                loader: 'webpack-remove-debug'
            }
        ]
    }
};

在您的 Webpack 2 配置中：

{
    module: {
        rules: [
            {
                test: /\.js$/,
                loader: 'webpack-remove-debug'
            }
        ]
    }
};

我用 IE11 和 axios 测试了它，这取决于使用 debug.

的 follow-redirects

PS。如果你对这一切发生的原因感兴趣，你可以查看 Qix 的回复：Transpile to ES5 #745

Internet Explorer 11、Angular 8 和 SocketIO 兼容性

Internet Explorer 11, Angular 8 and SocketIO Compatibility

internet-explorer

websocket

socket.io

angular