Vue Core Js

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Modified1 year, 10 months ago. Here is my vue.config.js file:. With this config, vue.js (Vue) library is excluded and I can link it from a CDN. But core-js is packed anyway and not recognized as an external library. What is wrong with my config? 22 gold badges2222 silver badges4141 bronze badges.


4141 bronze badges. You need to change babel config. Here is my babel.config.js:. 4141 bronze badges.

Put the client app in a separate project, outside from the ASP.NET Core project. Create the client project based on the framework CLI installed on your computer. Currently, the front-end project must be published manually (not currently supported with the Publish tool). For additional information, see

Objective: To setup a local Vue development environment, create a starter app, and understand the basics of how it works.

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Visual Studio 2022 Preview 2 or later with the ASP.NET and web development workload installed. Go to the Visual Studio downloads page to install it for free.If you need to install the workload and already have Visual Studio, go to Tools > Get Tools and Features.., which opens the Visual Studio Installer.

Choose the ASP.NET and web development workload, then choose Modify. npm (, which is included with Node.js. Vue CLI ( In the New Project Dialog, select Create a new project. Search for Vue in the search bar at the top and then select Standalone JavaScript Vue Template or Standalone TypeScript Vue Template. Give your project and solution a name. When you get to the Additional information window, be sure to check the Add integration for Empty ASP.NET Web API Project option. This option adds files to your Vue template so that it can be hooked up later with the ASP.NET Core project.

vue.config.json (modified). HelloWorld.vue (modified). package.json (modified). In Solution Explorer, right-click the solution name, hover over Add, and then select New Project. Search and select the ASP.NET Core Web API project. Give your project and solution a name. When you get to the Additional information window, select .NET 6.0 as your target framework.

Once the project is created, Solution Explorer should look like this:. Open launchSettings.json from the Properties folder, and under the profiles section for the backend app, change the default ports to 5001 and 5003. In Solution Explorer, right-click the ASP.NET Core project and choose Properties.


Go to the Debug menu and select Open debug launch profiles UI option. Clear the Launch browser option. Currently, launch.json must be located under the .vscode folder. Right-click the solution and select Set Startup Project. Change the startup project from Single startup project to Multiple startup projects. Select Start for each project’s action. Next, select the backend project and move it above the frontend, so that it starts up first.

Initializing a new project

Before you start the project, make sure that the port numbers match. Go to the launchSettings.json file in your ASP.NET Core project (in the Properties folder).

  1. Get the port number from the applicationUrl property. If there are multiple applicationUrl properties, look for one using an https endpoint.
  2. It should look similar to https://localhost:5001. Then, go to the vue.config.js file for your Vue project.
  3. Update the target property to match the applicationUrl property in launchSettings.json. When you update it, that value should look similar to this:. To start the project, press F5 or select the Start button at the top of the window. You will see two command prompts appear:.
  4. The ASP.NET Core API project running. The Vue CLI running the vue-cli-service serve command. Check console output for messages, such as a message instructing you to update your version of Node.js.
  5. In the Solution properties, set your backend app as the startup project. In the Debug menu, switch the profile using the Start button drop-down menu to the profile for your backend app.
  6. Next, in the Solution properties, reset to multiple startup projects.
  7. Finally, you are asked if you want to save this as a preset for future options. This is entirely up to you. If you like these settings over the existing presets and want to use them again, type y , otherwise type n .

The CLI will now begin scaffolding out your project, and installing all of your dependencies.

If you've never run the Vue CLI before, you'll get one more question — you'll be asked to choose a package manager. You can use the arrow keys to select which one you prefer. The Vue CLI will default to this package manager from now on. If you need to use a different package manager after this, you can pass in a flag --packageManager=, when you run vue create. So if you wanted to create the moz-todo-vue project with npm and you'd previously chosen yarn, you'd run vue create moz-todo-vue --packageManager=npm.

Note: We've not gone over all of the options here, but you can find more information on the CLI in the Vue docs.

Project structure

If everything went successfully, the CLI should have created a series of files and directories for your project. The most significant ones are as follows:

  • .eslintrc.js: This is a config file for ESLint. You can use this to manage your linting rules.
  • babel.config.js: This is the config file for Babel, which transforms modern JavaScript features being used in development code into older syntax that is more cross-browser compatible in production code. You can register additional babel plugins in this file.
  • .browserslistrc: This is a config for Browserslist. You can use this to control which browsers your tooling optimizes for.
  • public: This directory contains static assets that are published, but not processed by Webpack during build (with one exception; index.html gets some processing).
    • favicon.ico: This is the favicon for your app. Currently, it's the Vue logo.
    • index.html: This is the template for your app. Your Vue app is run from this HTML page, and you can use lodash template syntax to interpolate values into it.

      Note: this is not the template for managing the layout of your application — this template is for managing static HTML that sits outside of your Vue app. Editing this file typically only occurs in advanced use cases.

  • src: This directory contains the core of your Vue app.
    • main.js: this is the entry point to your application. Currently, this file initializes your Vue application and signifies which HTML element in the index.html file your app should be attached to. This file is often where you register global components or additional Vue libraries.
    • App.vue: this is the top-level component in your Vue app. See below for more explanation of Vue components.
    • components: this directory is where you keep your components. Currently, it just has one example component.
    • assets: this directory is for storing static assets like CSS and images. Because these files are in the source directory, they can be processed by Webpack. This means you can use pre-processors like Sass/SCSS or Stylus.

Note: Depending on the options you select when creating a new project, there might be other directories present (for example, if you choose a router, you will also have a views directory).

.vue files (single file components)

Like in many front-end frameworks, components are a central part of building apps in Vue. These components let you break a large application into discrete building blocks that can be created and managed separately, and transfer data between each other as required. These small blocks can help you reason about and test your code.

While some frameworks encourage you to separate your template, logic, and styling code into separate files, Vue takes the opposite approach. Using Single File Components, Vue lets you group your templates, corresponding script, and CSS all together in a single file ending in .vue. These files are processed by a JS build tool (such as Webpack), which means you can take advantage of build-time tooling in your project. This allows you to use tools like Babel, TypeScript, SCSS and more to create more sophisticated components.

As a bonus, projects created with the Vue CLI are configured to use .vue files with Webpack out of the box. In fact, if you look inside the src folder in the project we created with the CLI, you'll see your first .vue file: App.vue.

Let's explore this now.


Open your App.vue file — you'll see that it has three parts: