Get conic-gradient polyfill to work with Vue

Question

I'm trying to implement this Polyfill in my Vue.js project:

<script src="https://cdnjs.cloudflare.com/ajax/libs/prefixfree/1.0.7/prefixfree.min.js"></script>
<script src="conic-gradient.js"></script>

I'm using a Vue instantiated with Vue-CLI with single file components and webpack.

The description seems so simple, include two script tags and bam it works.

I've added the conic-gradient NPM package to my project (yarn add conic-gradient) which fetches both the conic-gradient script as well as the required prefixfree.

I've then gone ahead trying a dry import in my main.js:

import 'conic-gradient'

as well as

import conic-gradient from 'conic-gradient'

and then calling:

Vue.use(conic-gradient

I've also tried the dry import in my component (dome.vue)

Nothing seems to render the conic gradient however. What am I doing wrong?

Answer 1

Conic-Gradient is not a Vue plugin, so you can't just do Vue.use with it. Neither an ES6 module (sorry for late notice) so you can't use import ConicGradient..., the author published a failed npm package.

Since you said your project was generated with Vue-CLI, then you must find the src/main.js file, and place your import ConicGradient from 'conic-gradient' at the top of it.

And you can start using it like

import ConicGradient from 'conic-gradient'

new Vue({
    data: {
        gradient: new ConicGradient({
            stops: 'gold 40%, #f06 0',
            repeating: true,
            size: 400
       });
    }

})

Go to your index.html and paste this just before your body closing tag </body> (download that file and serve a local copy instead)

<script src="https://cdn.rawgit.com/LeaVerou/conic-gradient/609dc5f4/conic-gradient.js"></script>

Now in your Vue components you can use new window.ConicGradient({ ... })

A working snippet

Vue.config.productionTip = Vue.config.devtools = false

new Vue({
  el: '#app',
  data: {
    gradient: new window.ConicGradient({
      stops: 'red, yellow, lime, aqua, blue, magenta, red',
      size: 100
    })
  }
})

<script src="https://cdn.rawgit.com/LeaVerou/conic-gradient/609dc5f4/conic-gradient.js"></script>
<script src="https://unpkg.com/vue@2.5.16"></script>

<div id="app">
  <img :src="gradient.png" style="border-radius: 50%" />
</div>