前端如何把图片url地址https://url转成base64

一、直接上代码

async getImgImg() {
  let url = await this.base64(this.From.imageData)
}，
base64(url) {
 return new Promise(resolve => {
     const image = new Image()
     // 先设置图片跨域属性
     image.crossOrigin = 'Anonymous'
     // 再给image赋值src属性，先后顺序不能颠倒
     image.src = url
     image.onload = function () {
         const canvas = document.createElement('CANVAS')
         // 设置canvas宽高等于图片实际宽高
         canvas.width = image.width
         canvas.height = image.height
         canvas.getContext('2d').drawImage(image, 0, 0)
         // toDataUrl可以接收2个参数，参数一：图片类型，参数二： 图片质量0-1（不传默认为0.92）
         const dataURL = canvas.toDataURL('image/jpeg')
         resolve(dataURL)
     }
     image.onerror = () => {
         resolve({ message: '相片处理失败' })
     }
 })
},

链接: https://blog.youkuaiyun.com/weixin_63537474/article/details/133380515