npm install jquery --save

npm install bootstrap --save

修改.angular-cli.json文件：

      "styles": [

        "styles.css",

        "../node_modules/bootstrap/dist/css/bootstrap.css"

      ],

      "scripts": [

        "../node_modules/jquery/dist/jquery.js",

        "../node_modules/bootstrap/dist/js/bootstrap.js"

      ],

npm install @types/jquery --save-dev

npm install @types/bootstrap --save-dev

可是代码运行报错，这是怎么回事？

ERROR in ./node_modules/css-loader?{"sourceMap":false,"importLoaders":1}!./node_modules/postcss-loader?{"ident":"postcss"}!./node_modules/bootstrap/dist/css/bootstrap.css

Module build failed: BrowserslistError: Unknown browser major

    at error (C:\Users\xue\Desktop\myjob_router\node_modules\browserslist\index.js:37:11)

    at Function.browserslist.checkName (C:\Users\xue\Desktop\myjob_router\node_modules\browserslist\index.js:320:18)

    at Function.select (C:\Users\xue\Desktop\myjob_router\node_modules\browserslist\index.js:438:37)

    at C:\Users\xue\Desktop\myjob_router\node_modules\browserslist\index.js:207:41

    at Array.forEach (<anonymous>)

    at browserslist (C:\Users\xue\Desktop\myjob_router\node_modules\browserslist\index.js:196:13)

    at Browsers.parse (C:\Users\xue\Desktop\myjob_router\node_modules\autoprefixer\lib\browsers.js:44:14)

    at new Browsers (C:\Users\xue\Desktop\myjob_router\node_modules\autoprefixer\lib\browsers.js:39:28)

    at loadPrefixes (C:\Users\xue\Desktop\myjob_router\node_modules\autoprefixer\lib\autoprefixer.js:56:18)

    at plugin (C:\Users\xue\Desktop\myjob_router\node_modules\autoprefixer\lib\autoprefixer.js:62:18)

    at LazyResult.run (C:\Users\xue\Desktop\myjob_router\node_modules\postcss\lib\lazy-result.js:274:20)

    at LazyResult.asyncTick (C:\Users\xue\Desktop\myjob_router\node_modules\postcss\lib\lazy-result.js:189:32)

    at LazyResult.asyncTick (C:\Users\xue\Desktop\myjob_router\node_modules\postcss\lib\lazy-result.js:201:22)

    at processing.Promise.then._this2.processed (C:\Users\xue\Desktop\myjob_router\node_modules\postcss\lib\lazy-result.js:228:20)

    at Promise (<anonymous>)

    at LazyResult.async (C:\Users\xue\Desktop\myjob_router\node_modules\postcss\lib\lazy-result.js:225:27)

 @ ./node_modules/bootstrap/dist/css/bootstrap.css 4:14-123

 @ multi ./src/styles.css ./node_modules/bootstrap/dist/css/bootstrap.css

webpack: Failed to compile.