function loadImg(src) {

const oc = wx.createOffscreenCanvas()

const img = oc.createImage()

img.onload = () => {

loadImg(src)

console.log('load')

}

img.src = src

}

loadImg('data:image/png;base64,R0lGODlhAQABAIAAAAUEBAAAACwAAAAAAQABAAACAkQBADs=') //只会触发一次onload 期望触发多次

模拟器上是正常的 会触发多次onload