我尝试在角度安装时使用bootstrap 4。我跑了 npm install --save bootstrap @ next但我在运行时休息一下：
./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？
答案 0 :(得分：14)
问题可能是你得到了一些有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。
答案 1 :(得分：12)
Bootstrap新版本是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。
要运行您的应用删除最新版本标记（^）＆amp;运行npm install命令
答案 2 :(得分：7)
对于Bootstrap 4.0.0（发布）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"
}
答案 3 :(得分：5)
我已升级到Angular CLI 1.7.x，它开始正常运行。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"
],
答案 4 :(得分：2)
有同样的问题从这个
改变了我对package.json的依赖性"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-beta.3",
"core-js": "^2.4.1",
"font-awesome": "^4.7.0",
"zone.js": "^0.8.14"
}
to（将“bootstrap”：“4.0.0-beta.2”更改为稳定版本）
"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-beta.2",
"core-js": "^2.4.1",
"font-awesome": "^4.7.0",
"zone.js": "^0.8.14"
},
然后，运行： npm安装 服务
问题解决了。!!
答案 5 :(得分：0)
Bootstrap 4不再使用CSS了。在此版本中使用SCSS。所以不是导入'~bootstrap/scss/bootstrap.css'，
你应该导入'~bootstrap/scss/bootstrap.scss'。
答案 6 :(得分：0)
我在Bootstrap 4.1.1中遇到了同样的问题。解决方案是在package.json中将Boostrap版本更改为4.0.0-beta.2（无尖号），然后运行
npm install
ng serve
还要在您的import "~bootstrap/dist/css.bootstrap.css"文件中添加style.css。
答案 7 :(得分：-1)
现在可以使用 Angular CLI解决方法：1.6.5 。 Angular CLI一直依赖于不兼容的autoprefixer版本（https://github.com/angular/angular-cli/issues/9020）
输入 ng --version 验证版本。不要忘记在package.json中更新你的dev依赖：
"@angular/cli": "1.6.5",
答案 8 :(得分：-1)
对于仍有问题的人：
从angular-cli.json
手动删除bootrap CSS的url "styles":
[
**"../node_modules/bootstrap/dist/css/bootstrap.min.css",**
"../node_modules/font-awesome/css/font-awesome.min.css",
"styles.css"
]