Vue Js 2 Vue Prototype

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Modified9 months ago. I'm writing a custom plugin for the OneSignal Web SDK and I cannot get VSCode to pick up on the plugins' types declarations/code completion etc..

How Changes Are Tracked

I want the plugin to be accessible globally from all components in the application via a custom instance $ property or global property (tried both).

  • VSCode doesn't pick up on my Vue interface augmentation. The Vue documentation is very bare and whatever I try doesn't work.
  • I have a plugin VueOneSignal defined as so:.
  • The OneSignal object is what I want to expose to the app in all components and will contain all of the functions I want in the plugin and is defined above in the same file.
  • Vue CLI 3.0 installed on your machine. To do this, uninstall the old CLI version first:

    Then, install the new one:

  • I want the functions to be callable via something like this.$VueOneSignal.init().
  • Here we have only 1 function init:.
  • and the interface above that:. I have a typings file at src/plugins/plugin.d.ts:.

Using the plugin

which is what I've read is the correct way to augment Vue to detect the property from the app and its components. In my main.ts file, I use it as so:.

Finally, when I go into the src/components/HelloWorld.vue and attempt to call the function, it works (as in the code runs) but I get a CLI error and don't get the TS benefits like code completion, type-checking etc.. If I hover over this.$VueOneSignal, it is marked as any type.


I wish the documentation for using Vue + Vue plugins + Typescript was better. Does anyone know what I can do to fix this? Rodrigo Gomez-Palacio. Rodrigo Gomez-PalacioRodrigo Gomez-Palacio. You’re browsing the documentation for v2.x and earlier. For v3.x, click here.


Vue (pronounced /vjuː/, like view) is a progressive framework for building user interfaces.

Unlike other monolithic frameworks, Vue is designed from the ground up to be incrementally adoptable. The core library is focused on the view layer only, and is easy to pick up and integrate with other libraries or existing projects. On the other hand, Vue is also perfectly capable of powering sophisticated Single-Page Applications when used in combination with modern tooling and supporting libraries.

Composing with Components

If you’d like to learn more about Vue before diving in, we created a video walking through the core principles and a sample project. If you are an experienced frontend developer and want to know how Vue compares to other libraries/frameworks, check out the Comparison with Other Frameworks. The official guide assumes intermediate level knowledge of HTML, CSS, and JavaScript.

Async Update Queue

If you are totally new to frontend development, it might not be the best idea to jump right into a framework as your first step - grasp the basics then come back! Prior experience with other frameworks helps, but is not required. The easiest way to try out Vue.js is using the Hello World example.

Feel free to open it in another tab and follow along as we go through some basic examples.

Or, you can create an index.html file and include Vue with:. The Installation page provides more options of installing Vue. Note: We do not recommend that beginners start with vue-cli, especially if you are not yet familiar with Node.js-based build tools.

The Importance of Scoping Instance Properties

If you prefer something more interactive, you can also check out this tutorial series on Scrimba, which gives you a mix of screencast and code playground that you can pause and play around with anytime.

Extend with Plugins

At the core of Vue.js is a system that enables us to declaratively render data to the DOM using straightforward template syntax:. We have already created our very first Vue app!

This looks pretty similar to rendering a string template, but Vue has done a lot of work under the hood. The data and the DOM are now linked, and everything is now reactive. How do we know? Open your browser’s JavaScript console (right now, on this page) and set app.message to a different value.

You should see the rendered example above update accordingly.

Note that we no longer have to interact with the HTML directly. A Vue app attaches itself to a single DOM element (#app in our case) then fully controls it. The HTML is our entry point, but everything else happens within the newly created Vue instance.

Ready for More?

In addition to text interpolation, we can also bind element attributes like this:. Hover your mouse over me for a few seconds to see my dynamically bound title! Here we are encountering something new. The v-bind attribute you are seeing is called a directive.

Directives are prefixed with v- to indicate that they are special attributes provided by Vue, and as you may have guessed, they apply special reactive behavior to the rendered DOM.

Here, it is basically saying “keep this element’s title attribute up-to-date with the message property on the Vue instance.”. If you open up your JavaScript console again and enter app2.message = 'some new message', you’ll once again see that the bound HTML - in this case the title attribute - has been updated.

It’s easy to toggle the presence of an element, too:. Go ahead and enter app3.seen = false in the console.

You should see the message disappear. This example demonstrates that we can bind data to not only text and attributes, but also the structure of the DOM.

Moreover, Vue also provides a powerful transition effect system that can automatically apply transition effects when elements are inserted/updated/removed by Vue.

Browse other questions tagged typescriptvue.jspluginsvuejs2 or ask your own question.

There are quite a few other directives, each with its own special functionality. For example, the v-for directive can be used for displaying a list of items using the data from an Array:. In the console, enter app4.todos.push({ text: 'New item' }).

Declaring Reactive Properties

Debugging Vue.js applications can be difficult, especially when there are dozens, if not hundreds of mutations during a user session. If you’re interested in monitoring and tracking Vue mutations for all of your users in production, try LogRocket.

LogRocket is like a DVR for web and mobile apps, recording literally everything that happens in your Vue apps including network requests, JavaScript errors, performance problems, and much more. Instead of guessing why problems happen, you can aggregate and report on what state your application was in when an issue occurred.

The LogRocket Vuex plugin logs Vuex mutations to the LogRocket console, giving you context around what led to an error, and what state the application was in when an issue occurred.

Modernize how you debug your Vue apps - Start monitoring for free.