[日期选择器] difference-between-UMD-and-CMD

and what should I use in different scenario(like import from node env or browser env)? 在写日期选择器的时候，在构建的时候，发现了一些问题：

require.js node.js: import + require browser

一个组件应该提供哪几种格式的包来满足这种需求呢？

{
  "name": "v-md-date-range-picker",
  "version": "0.0.6",
  "description": "A material design daterange picker",
  "main": "dist/v-md-date-range-picker.cjs.js",
  "module": "dist/v-md-date-range-picker.es.js",
  "browser": "dist/v-md-date-range-picker.js",
  "cdn": "dist/v-md-date-range-picker.min.js",
  "unpkg": "dist/v-md-date-range-picker.min.js",
  "author": "ly525 <lantern.done@gmail.com>",
}