vue中怎么引入bootstrap

$ npm install jquery --save-dev

+ const webpack = require("webpack");module.exports = {    entry: './index.js',    output: {        path: path.join(__dirname, './dist'),        publicPath: '/dist/',        filename: 'index.js'    },  + plugins: [        new webpack.ProvidePlugin({            jQuery: 'jquery',            $: 'jquery'        })    ]}

import $ from 'jquery' ;