UploadTask.onProgressUpdate(function listener)

Introduction

Listen to upload progress change events.

Parameters

function listener

The listener function for upload progress change events.

Parameters

Object res

Attribute	Type	Description
progress	number	Upload progress in percentage.
totalBytesWritten	number	The length of data that has been uploaded, in Bytes.
totalBytesExpectedToWrite	number	The total length of data expected to be uploaded, in Bytes.

Sample Code

// pages/index/index.js

Page({
  uploadFile() {
    const uploadTask = dlt.uploadFile({
      url: "xxx",
      filePath: tempFilePaths[0],
      name: "file",
      formData: {
        user: "test",
      },
      success(res) {
        console.log(res);
      },
      fail(res) {
        console.error(res);
      },
    });

    uploadTask.onProgressUpdate((res) => {
      console.log("Upload Progress:", res.progress);
      console.log("Data length already uploaded:", res.totalBytesWritten);
      console.log("Total expected data length to upload:", res.totalBytesExpectedToWrite);
    });
  },
});