(vue)elementUi中el-upload上传附件之后 点击附件可下载
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handlePreview(file) {
console.log(file)
const fileUrl = 'https://.../zzy/' + file.url
const a = document.createElement('a')
a.href = fileUrl
a.download = file.name
a.style.display = 'none'
// a.setAttribute('download', file.name)
document.body.appendChild(a)
a.click()
document.body.removeChild(a)
},解决参考：https://segmentfault.com/q/1010000014358383
