BrowserslistError:未知的浏览器专业版

Question

我正试图在角度安装时使用bootstrap 4.我已经运行了npm install --save bootstrap @ next但我在运行时休息了一下:

./node_modules/css-loader?{"sourceMap":false,"importLoaders":1}!./node_modules/postcss-loader/lib?{"ident":"postcss","plugins":[null,null,null],"sourceMap":false}!./node_modules/bootstrap/dist/css/bootstrap.min.css
Module build failed: BrowserslistError: Unknown browser major
    at error (C:\xampp\htdocs\tick_master_angular\web\node_modules\browserslist\index.js:37:11)
    at Function.browserslist.checkName (C:\xampp\htdocs\tick_master_angular\web\node_modules\browserslist\index.js:320:18)
    at Function.select (C:\xampp\htdocs\tick_master_angular\web\node_modules\browserslist\index.js:438:37)
    at C:\xampp\htdocs\tick_master_angular\web\node_modules\browserslist\index.js:207:41
    at Array.forEach (native)
    at browserslist (C:\xampp\htdocs\tick_master_angular\web\node_modules\browserslist\index.js:196:13)
    at Browsers.parse (C:\xampp\htdocs\tick_master_angular\web\node_modules\autoprefixer\lib\browsers.js:44:14)
    at new Browsers (C:\xampp\htdocs\tick_master_angular\web\node_modules\autoprefixer\lib\browsers.js:39:28)
    at loadPrefixes (C:\xampp\htdocs\tick_master_angular\web\node_modules\autoprefixer\lib\autoprefixer.js:56:18)
    at plugin (C:\xampp\htdocs\tick_master_angular\web\node_modules\autoprefixer\lib\autoprefixer.js:62:18)
    at LazyResult.run (C:\xampp\htdocs\tick_master_angular\web\node_modules\postcss-loader\node_modules\postcss\lib\lazy-result.js:270:20)
    at LazyResult.asyncTick (C:\xampp\htdocs\tick_master_angular\web\node_modules\postcss-loader\node_modules\postcss\lib\lazy-result.js:185:32)
    at LazyResult.asyncTick (C:\xampp\htdocs\tick_master_angular\web\node_modules\postcss-loader\node_modules\postcss\lib\lazy-result.js:197:22)
    at processing.Promise.then._this2.processed (C:\xampp\htdocs\tick_master_angular\web\node_modules\postcss-loader\node_modules\postcss\lib\lazy-result.js:224:20)
    at LazyResult.async (C:\xampp\htdocs\tick_master_angular\web\node_modules\postcss-loader\node_modules\postcss\lib\lazy-result.js:221:27)
    at LazyResult.then (C:\xampp\htdocs\tick_master_angular\web\node_modules\postcss-loader\node_modules\postcss\lib\lazy-result.js:127:21)
 @ ./node_modules/css-loader?{"sourceMap":false,"importLoaders":1}!./node_modules/postcss-loader/lib?{"ident":"postcss","sourceMap":false}!./src/styles.css 3:10-190
 @ ./src/styles.css
 @ multi ./src/styles.css

有人可以帮忙吗？

Answer 1

问题可能是你得到了一些bug的最新版本.我注意到bootstrap@4.0.0-beta.3导致了这个问题,但不是bootstrap@4.0.0-beta.2.检查你的是否相同.尝试卸载并运行具有特定版本的内容.

npm install bootstrap@4.0.0-alpha.6

这解决了我的问题.

Answer 2

Bootstrap新版本来自v4.0.0-beta.2,你的package.json有^ bootstrap4.0.0-alpha.6所以新的bootstrap版本需要浏览器列表依赖.

要运行您的应用程序,请删除最新版本标记(^)并运行npm install命令

Answer 3

对于Bootstrap 4.0.0(发行版),我必须将CLI升级到1.6.5 - 它可以工作!

  "dependencies": {
    "@angular/animations": "^5.0.0",
    "@angular/common": "^5.0.0",
    "@angular/compiler": "^5.0.0",
    "@angular/core": "^5.0.0",
    "@angular/forms": "^5.0.0",
    "@angular/http": "^5.0.0",
    "@angular/platform-browser": "^5.0.0",
    "@angular/platform-browser-dynamic": "^5.0.0",
    "@angular/router": "^5.0.0",
    "@ng-bootstrap/ng-bootstrap": "1.0.0-beta.9",
    "bootstrap": "4.0.0",
    "core-js": "^2.4.1",
    "font-awesome": "^4.7.0",
    "jquery": "^3.2.1",
    "popper.js": "^1.12.9",
    "rxjs": "^5.5.2",
    "zone.js": "^0.8.14"
  },
  "devDependencies": {
    "@angular/cli": "^1.6.5",
    "@angular/compiler-cli": "^5.0.0",
    "@angular/language-service": "^5.0.0",
    "@types/jasmine": "~2.5.53",
    "@types/jasminewd2": "~2.0.2",
    "@types/node": "~6.0.60",
    "codelyzer": "^4.0.1",
    "jasmine-core": "~2.6.2",
    "jasmine-spec-reporter": "~4.1.0",
    "karma": "~1.7.0",
    "karma-chrome-launcher": "~2.1.1",
    "karma-cli": "~1.0.1",
    "karma-coverage-istanbul-reporter": "^1.2.1",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.1.2",
    "ts-node": "~3.2.0",
    "tslint": "~5.7.0",
    "typescript": "~2.4.2"
  }

Answer 4

我已升级到Angular CLI 1.7.x,它开始正常工作.我推荐这个解决方案.我的意思是升级Angular CLI,它应该适合你!

另一种解决方法是从node_modules/bootstrap/package.json中删除以下行

"browserslist": [
"last 1 major version", <----- delete this line
">= 1%", <----- delete this line
"Chrome >= 45",
"Firefox >= 38",
"Edge >= 12",
"Explorer >= 10",
"iOS >= 9",
"Safari >= 9",
"Android >= 4.4",
"Opera >= 30"
],