This package is a kind of converter between Blob/File and base64 URL.

Installation

npm i @premix/blob

Basic usage

import { base64ToBlob, blobToBase64, downloadBlob } from '@premix/blob'

const base64String = 'data:image/png;base64,xxxx'
const blob = base64ToBlob(base64String)
const base64 = blobToBase64(blob)
console.log(base64String === base64) // true

// download blob object to local file system
downloadBlob(blob)

Advanced usage

• Download the Excel Blob object

  import axios from 'axios'
  import { downloadBlob } from '@premix/blob'
  
  function downloadExcel(
    url: string,
    payload: Record<string, any>,
    filename: string
  ) {
    return axios
      .post(url, payload, {
        responseType: 'blob'
      })
      .then(res => {
        const blob = new Blob([res], {
          type:
            'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=utf-8'
        })
        // make Blob object downloadable
        downloadBlob(blob)
      })
  }

• Convert any HTTP(S) URL to base64 or Blob

  import axios from 'axios'
  import { blobToBase64 } from '@premix/blob'
  
  function urlToBas64(url: string, payload: Record<string, any>) {
    return axios
      .get(url, { params: payload }, { responseType: 'blob' })
      .then(res => blobToBase64(res))
  }

License

MIT © Bowen Liu