this is not needed in the production environment, how to install the development environment is dependent, and the production environment is also effective?
require("es6-promise").polyfill();
this is not needed in the production environment, how to install the development environment is dependent, and the production environment is also effective?
require("es6-promise").polyfill();es6 is used by the development environment, and the code that is compiled into es5,es5 is recognized by the browser. So you only use-- save-dev for this plugin. And like some libraries, you also need to use in the production environment, use-- save, such as JQuery, itself is a browser can run the js library, in the production environment is still used as is, compilation will not change the syntax.
-- save--dev depends on both development and production
entering npm install, normally installs both dependencies and devDependencies, so you can't see the difference.
execute npm install-- production , install only dependencies, and ignore devDependencies.
so it's best to distinguish between production and development packages
npm run build converts es6 to es5, so it's useless after packaging, it's just a tool
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