如何使用nodeca / pica和React在客户端调整图像大小？

Question

我正在尝试使用nodeca / pica库将图像发送到React中的画布之前调整图像的大小：

import pica from 'pica'

let resizedCanvas = <canvas height={500} width={500}/>

  pica().resize(myImage, resizedCanvas, {
  unsharpAmount: 80,
  unsharpRadius: 0.6,
  unsharpThreshold: 2
}).then(result => console.log(`resize done!  ${result}`))
    .catch(err => console.log(err))

但是我在控制台中遇到以下错误：

TypeError: stages.shift is not a function or its return value is not iterable
at processStages (index.js:508)
at init.then (index.js:549)

Answer 1

问题是我不应该使用JSX来构建画布。以下解决方案效果很好：

const resizedCanvas = document.createElement('canvas')
resizedCanvas.height = 500
resizedCanvas.width = 500