前端实现大文件切片

const uploadFile = (chunks) => { const List = [] for (let i = 0; i < chunks.length; i++) { const formData = new FormData() formData.append('index', i) formData.append('total', chunks.length) formData.append('fileName', 'xiezhen') formData.append('file', chunks[i]) List.push(fetch('http://127.0.0.1:3000/up', { method: 'POST', body: formData })) } Promise.all(List).then(res => { fetch('http://127.0.0.1:3000/merge',{ method: 'POST', headers:{ 'Content-Type': 'application/json' }, body:JSON.stringify({ fileName: 'xiaoManXieZhen', }) }).then(res => { console.log(res) }) }) }