I followed the documentation and Github I did the following steps:

1. install vue-konva and konva and canvas using npm install vue-konva konva --save and npm install canvas --save.

2. Created vuekonva.js under plugins folder with below content:

import Vue from 'vue'
import VueKonva from 'vue-konva'
Vue.use(VueKonva)

3. Added plugins: [ "~/plugins/vuekonva"], under nuxt.config.js

4. I tried adding under nuxt-config.js but still no luck:

build: {
    standalone: true
  },

5. Created a page under pages folder and added code from documenation:

<template>
  <div>
    <v-stage ref="stage" :config="stageSize">
      <v-layer>
        <v-text :config="{ text: 'Some text on canvas', fontSize: 15 }" />
        <v-rect
          :config="{
            x: 20,
            y: 50,
            width: 100,
            height: 100,
            fill: 'red',
            shadowBlur: 10,
          }"
        />
        <v-circle
          :config="{
            x: 200,
            y: 100,
            radius: 50,
            fill: 'green',
          }"
        />
        <v-line
          :config="{
            x: 20,
            y: 200,
            points: [0, 0, 100, 0, 100, 100],
            tension: 0.5,
            closed: true,
            stroke: 'black',
            fillLinearGradientStartPoint: { x: -50, y: -50 },
            fillLinearGradientEndPoint: { x: 50, y: 50 },
            fillLinearGradientColorStops: [0, 'red', 1, 'yellow'],
          }"
        />
      </v-layer>
      <v-layer ref="dragLayer" />
    </v-stage>
  </div>
</template>

<script>
export default {
  data () {
    return {
      stageSize: {
        width,
        height
      }
    }
  },
  mounted () {
    if (process.browser) {
      this.stageSize.width = window.innerWidth
      this.stageSize.height = window.innerHeight
    }
  }
}
</script>

I get the error: Must use import to load ES Module:

I tried without plugins and it is throwing the error:

vue.runtime.esm.js:620 [Vue warn]: Unknown custom element: <v-stage> - did you register the component correctly? For recursive components, make sure to provide the "name" option.

found in

Not understanding whats the issue please help.

CodePudding user response：

According to Nuxt documentation some plugins export an ES6 module. I think this is the case for konva node module. I followed the steps you mentioned above. But in the nuxt.config.js file I configured the plugin as follow:

plugins: [    
    { src: "~/plugins/vuekonva", ssr: false }
],

build: {
    transpile: ['konva']
},

<iframe name="sif1" sandbox="allow-forms allow-modals allow-scripts" frameborder="0"></iframe>

After that I replaced the code of your page with the code of konvajs as follows:

<template>
  <v-stage :config="configKonva">
    <v-layer>
      <v-circle :config="configCircle"></v-circle>
    </v-layer>
  </v-stage>
</template>

<script>
export default {
  data() {
    return {
      configKonva: {
        width: 200,
        height: 200
      },
      configCircle: {
        x: 100,
        y: 100,
        radius: 70,
        fill: "red",
        stroke: "black",
        strokeWidth: 4
      }
    };
  }
};

</script>

<iframe name="sif2" sandbox="allow-forms allow-modals allow-scripts" frameborder="0"></iframe>

That is working for me when I link to the page with nuxt-link. but if I refresh the page I get some errors that is maybe for SSR. I am not sure but if you read this documentation you maybe could solve the problem for SSR.