网上很多说vue打包时在config的index.js中加入productionSourceMap: false,然而并没有什么用，该有的map文件还是出现了！
解决方案
在vue.config.js中module.export = {}中加入一行
productionSourceMap: false,

下面是例子

module.exports = {
// Project deployment base
// By default we assume your app will be deployed at the root of a domain,
// e.g. https://www.my-app.com/
// If your app is deployed at a sub-path, you will need to specify that
// sub-path here. For example, if your app is deployed at
// https://www.foobar.com/my-app/
// then change this to ‘/my-app/’
lintOnSave: false,
publicPath: BASE_URL,
productionSourceMap: false,