Angular 7 - 生产模式：我无法使用 tab 键浏览页面

Question

我遇到了一个我真的无法解决的问题！当我在开发模式（ng serve）上运行我的 angular 7 项目时，我可以使用 tab 键浏览我的页面（表单、链接、按钮等）。当我运行 ng serve --prod 并在本地（本地主机）运行项目时，选项卡导航也可以工作。但奇怪的是，当我将生产版本放入服务器时，tab 键停止工作。

我将把我的 angular.json 文件留在这里，因为我最好的办法是这个问题与某些配置有关（只是不知道是哪一个）

我用谷歌搜索又搜索了一遍，但找不到任何相关内容...

 {
  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
  "version": 1,
  "newProjectRoot": "projects",
  "projects": {
    "Marketplace": {
      "root": "",
      "sourceRoot": "src",
      "projectType": "application",
      "architect": {
        "build": {
          "builder": "@angular-devkit/build-angular:browser",
          "options": {
            "outputPath": "dist",
            "index": "src/index.html",
            "main": "src/main.ts",
            "tsConfig": "src/tsconfig.app.json",
            "polyfills": "src/polyfills.ts",
            "assets": [
              {
                "glob": "**/*",
                "input": "src/assets/ubrest",
                "output": "assets"
              },
              "src/assets/ubrest/favicon.ico",
              "src/.htaccess"
            ],
            "styles": [
              "node_modules/bootstrap/dist/css/bootstrap.min.css",
              "node_modules/summernote/dist/summernote-lite.css",
              "node_modules/owl.carousel/dist/assets/owl.carousel.css",
              "node_modules/owl.carousel/dist/assets/owl.theme.default.css",  
              "node_modules/fullpage.js/dist/jquery.fullpage.css",
              "src/assets/ubrest/sass/styles.scss"        
              ],
            "stylePreprocessorOptions": {
              "includePaths": [
                "src/assets/ubrest/sass"
              ]
            },
            "scripts": [
              "node_modules/jquery/dist/jquery.min.js",
              "node_modules/summernote/dist/summernote-lite.js",
              "node_modules/owl.carousel/dist/owl.carousel.min.js",
              "node_modules/fullpage.js/dist/jquery.fullpage.min.js",
              "node_modules/fullpage.js/dist/jquery.fullpage.extensions.min.js"
            ]
          },
          "configurations": {
            "production": {
              "optimization": false,
              "outputHashing": "all",
              "sourceMap": false,
              "extractCss": true,
              "namedChunks": false,
              "aot": true,
              "extractLicenses": true,
              "vendorChunk": false,
              "buildOptimizer": true,
              "fileReplacements": [
                {
                  "replace": "src/environments/environment.ts",
                  "with": "src/environments/environment.prod.ts"
                }
              ]
            }
          }
        },
        "serve": {
          "builder": "@angular-devkit/build-angular:dev-server",
          "options": {
            "browserTarget": "Marketplace:build",
            "port": 8080
          },
          "configurations": {
            "production": {
              "browserTarget": "Marketplace:build:production"
            }
          }
        },
        "extract-i18n": {
          "builder": "@angular-devkit/build-angular:extract-i18n",
          "options": {
            "browserTarget": "Marketplace:build"
          }
        },
        "test": {
          "builder": "@angular-devkit/build-angular:karma",
          "options": {
            "main": "src/test.ts",
            "karmaConfig": "./karma.conf.js",
            "polyfills": "src/polyfills.ts",
            "tsConfig": "src/tsconfig.spec.json",
            "scripts": [],
            "styles": [
              "node_modules/bootstrap/dist/css/bootstrap.min.css",
              "node_modules/ng2-toastr/bundles/ng2-toastr.min.css",
              "src/assets/sass/styles.scss"
            ],
            "assets": [
              "src/assets",
              "src/favicon.ico"
            ]
          }
        },
        "lint": {
          "builder": "@angular-devkit/build-angular:tslint",
          "options": {
            "tsConfig": [
              "src/tsconfig.app.json",
              "src/tsconfig.spec.json"
            ],
            "exclude": [
              "**/node_modules/**"
            ]
          }
        }
      }
    },
    "Marketplace-e2e": {
      "root": "",
      "sourceRoot": "",
      "projectType": "application",
      "architect": {
        "e2e": {
          "builder": "@angular-devkit/build-angular:protractor",
          "options": {
            "protractorConfig": "./protractor.conf.js",
            "devServerTarget": "Rhizom Marketplace:serve"
          }
        },
        "lint": {
          "builder": "@angular-devkit/build-angular:tslint",
          "options": {
            "tsConfig": [
              "e2e/tsconfig.e2e.json"
            ],
            "exclude": [
              "**/node_modules/**"
            ]
          }
        }
      }
    }
  },
  "defaultProject": "Marketplace",
  "schematics": {
    "@schematics/angular:component": {
      "prefix": "app",
      "styleext": "scss"
    },
    "@schematics/angular:directive": {
      "prefix": "app"
    }
  }
}

谢谢！

Answer 1

我可以看到您正在使用 fullPage.js。 该库会覆盖选项卡功能，以便在某些情况下保持正确的布局。

为了测试这是否是您的问题，您可以尝试在控制台上调用：

$.fn.fullpage.destroy();

这将销毁 fullPage.js 使用的所有 JS 处理程序，但会保留整页结构。

真正没有意义的是，您只在生产中而不是在开发中遇到问题。

无论如何，我都会建议您将 fullpage.js 版本更新为最新版本。 Fullpage.js 3.X。正如您在changelog 中看到的那样，它摆脱了 jQuery 并解决了选项卡功能的某些问题。

另外，请注意您只需包含一次 fullPage.js 并且您要执行两次，这可能会导致问题：

          "node_modules/fullpage.js/dist/jquery.fullpage.min.js",
          "node_modules/fullpage.js/dist/jquery.fullpage.extensions.min.js"

只使用扩展之一。

Answer 2

这很奇怪。我们有以现代角度构建的应用程序，但我们从未在任何可访问性审核中遇到过这个问题。你看过标签索引吗？如果您使用的是自定义组件，您可能需要将 tabindex="0" 分配给那些应该具有键盘焦点的元素。