How to disable "development mode " warning in VueJS

In VueJS, when using the development version of the Vue library, it defaults to displaying "development mode" warnings in the console. This is intended to remind developers that they are using the development version of Vue, not the production version. The development version includes detailed warnings and hints that aid in development and debugging, but this increases the application size and reduces runtime performance. Therefore, for production deployment, it is recommended to use the production version of VueJS.

Steps to Disable "development mode" Warnings

1. Using the Production Version of VueJS: The simplest approach is to use the production version of VueJS in your application. You can introduce the production version through the following methods:

   • If you are directly including Vue in HTML using a <script> tag, ensure you reference the minified version (e.g., using vue.min.js instead of vue.js).

     html
     <!-- Using production version -->
     <script src="https://cdn.jsdelivr.net/npm/vue@2.6.12/dist/vue.min.js"></script>

   • If you are using package managers like NPM or Yarn, ensure that the appropriate environment variables are configured during the build process for production mode. For example, with Webpack, you can set mode to 'production' in webpack.config.js, which will automatically use the production version of Vue.

     javascript
     module.exports = {
       mode: 'production'
     };

2. Setting Environment Variables: During development, if you need to temporarily disable warnings, you can set environment variables to tell Vue not to display warnings and hints from development mode.

   • For projects created with Vue CLI, add the following to the .env.production file in the project root directory:

     shell
     NODE_ENV=production

3. Programmatic Control: Although not recommended, as it may obscure useful warnings and error hints, you can disable Vue warnings programmatically during application initialization:

   javascript
   Vue.config.productionTip = false;
   Vue.config.devtools = false;

Summary

The best practice is to use the production version of Vue for production deployment. This not only disables development mode warnings but also improves performance. By appropriately configuring build tools and environment variables, you can ensure the correct version of Vue is used in both development and production environments, enhancing the application's efficiency and security.