Only make vue-p5 available as a client-side component in Nuxt to avoid SSR and SSG render errors.

MySketch.vue

<!-- - components/MySketch.vue -->
<template>
		<section class="sketch">
  			<client-only>
						<VueP5
							v-on="{setup, draw}">
						</VueP5>
					</client-only>
			</section>
</template>

<script>
export default {
    mounted () {
      if (process.client) {
        //do any setup you need to here
      }
    },
		methods: {
				setup(sketch) {
						sketch.createCanvas(sketch.windowWidth, sketch.windowHeight);
						sketch.background(255);
						sketch.noStroke();
				},
				draw(sketch) {
					sketch.background(255);
				}
		}
}
</script>

nuxt.config.js

// - nuxt.config.js
//........
	plugins: [
		'@plugins/p5.client.js'
	],
//......

p5.client.js

// - plugins/p5.client.js

import Vue from 'vue';
import VueP5 from 'vue-p5';

Vue.component('VueP5', VueP5);