问在基于SFC的vuejs项目中使用paperjs

EN

<template>
    <canvas resize id="main-canvas">{{circle_diameter}}</canvas>
</template>

<script>
import paper from 'paper'
export default {
    data: () => ({ x: 20, y: 20 }),
    props: ['circle_diameter'],
    methods: {
        updateDrawing() {
            paper.setup(document.getElementById('main-canvas'))
            // Now, draw your things based on component state.
            const point = new paper.Point(this.x, this.y)
            const circle = new paper.Path.Circle(point, this.circle_diameter/2)
            circle.fillColor = 'grey'
            circle.strokeColor = 'black'
        },
    },
    updated() {
        this.updateDrawing()
    },
}
</script>