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Gathering detailed insights and metrics for @eatsjobs/audio-recorder-polyfill-es

@eatsjobs/audio-recorder-polyfill-es - 0.1.1 | npmpackage.info

@eatsjobs/audio-recorder-polyfill-es

MediaRecorder polyfill to record audio in Edge and Safari

0.1.1

587

MIT

JavaScript

53.55 kB

2.5

Installations

npm install @eatsjobs/audio-recorder-polyfill-es

Developer Guide

BETA

Typescript

No

Module System

CommonJS

Node Version

10.15.0

NPM Version

6.4.1 Pull Requests

Open

0

Total

59

Closed

3

Merged

56

Issues

Open

13

Total

64

Closed

51

Releases

Unable to fetch releases

Languages

JavaScript

Pug

JavaScript (92.41%)

Pug (7.59%)

Developer

Download Statistics

Total Downloads

Last Day

Last Week

Last Month

Last Year

GitHub Statistics

MIT License

587 Stars

239 Commits

76 Forks

16 Watchers

2 Branches

16 Contributors

Updated on Jul 02, 2025

Maintainers

View All 16 Contributors

Package Meta Information

Latest Version

0.1.1

Package Id

@eatsjobs/audio-recorder-polyfill-es@0.1.1

Unpacked Size

53.55 kB

Size

9.29 kB

File Count

NPM Version

6.4.1

Node Version

10.15.0

Total Downloads

Cumulative downloads

Total Downloads

NaN

Last Day

NaN

Compared to previous day

Last Week

NaN

Compared to previous week

Last Month

NaN

Compared to previous month

Last Year

NaN

Compared to previous year

Weekly Downloads

Monthly Downloads

Yearly Downloads

Audio Recorder Polyfill

MediaRecorder polyfill to record audio in Edge and Safari 11. Try it in online demo.

Spec compatible. In the future when all browsers will support MediaRecorder, you will just remove polyfill.
Small. Less than 1 KB (minified and gzipped). No dependencies. It uses Size Limit to control size.
One file. In contrast to other recorders, this polyfill uses “inline worker” and don’t need a separated file for Web Worker.

1navigator.mediaDevices.getUserMedia({ audio: true }).then(stream => {
2  recorder = new MediaRecorder(stream)
3  recorder.addEventListener('dataavailable', e => {
4    audio.src = URL.createObjectURL(e.data)
5  })
6  recorder.start()
7})

Install

Install package:

1npm install --save audio-recorder-polyfill

If you bundle your app with "Webpack", "Roll up" or "Parcel", you can dynamic import the polyfill before you application loads

1  if (!window.MediaRecorder || isIE || isSafari) {
2    import('audio-recorder-polyfill').then((MediaRecorderPolyfill) => {
3      window.MediaRecorder = MediaRecorderPolyfill.default || MediaRecorderPolyfill;
4    }).then(() => {
5      // start the app
6    });
7  }

Or you can load the "UMD" bundle

1function loadScript(url, callback) {
2  var script = document.createElement("script")
3  script.type = "text/javascript";
4  if(script.readyState) {  // only required for IE <9
5    script.onreadystatechange = function() {
6      if ( script.readyState === "loaded" || script.readyState === "complete" ) {
7        script.onreadystatechange = null;
8        callback();
9      }
10    };
11  } else {  //Others
12    script.onload = function() {
13      callback();
14    };
15  }
16
17  script.src = url;
18  document.getElementsByTagName("head")[0].appendChild(script);
19}
20if (!window.MediaRecorder || isIE || isSafari) {
21  var umdURL = 'https://unpkg.com/audio-recorder-polyfill/dist/audio-polyfill.umd.js';
22  loadScript(umdURL, function() {
23    window.MediaRecorder = window.MediaRecorderPolyfill;
24    // startApplication()
25  });
26}

You can also use the ".mjs" module right in the browser that supports new script type=module tags

1<script type='module'>
2  import MediaRecorderPolyfill from 'https://unpkg.com/audio-recorder-polyfill/dist/audio-polyfill.mjs'
3
4</script>

Usage

In the begging, we need to show a warning in browsers without Web Audio API:

1if (MediaRecorder.notSupported) {
2  noSupport.style.display = 'block'
3  dictaphone.style.display = 'none'
4}

Then you can use standard MediaRecorder API:

1let recorder
2
3recordButton.addEventListener('click', () => {
4  // Request permissions to record audio
5  navigator.mediaDevices.getUserMedia({ audio: true }).then(stream => {
6    recorder = new MediaRecorder(stream)
7
8    // Set record to <audio> when recording will be finished
9    recorder.addEventListener('dataavailable', e => {
10      audio.src = URL.createObjectURL(e.data)
11    })
12
13    // Start recording
14    recorder.start()
15  })
16})
17
18stopButton.addEventListener('click', () => {
19  // Stop recording
20  recorder.stop()
21  // Remove “recording” icon from browser tab
22  recorder.stream.getTracks().forEach(i => i.stop())
23})

If you need to upload record to the server, we recommend using timeslice. MediaRecorder will send recorded data every specified millisecond. So you will start uploading before recording would finish.

1// Will be executed every second with next part of audio file
2recorder.addEventListener('dataavailable', e => {
3  sendNextPiece(e.data)
4})
5// Dump audio data every second
6recorder.start(1000)

Audio Formats

Chrome records natively only to .webm files. Firefox to .ogg.

This polyfill saves records to .wav files. Compression is not very good, but encoding is fast and simple.

You can get used file format in e.data.type:

1recorder.addEventListener('dataavailable', e => {
2  e.data.type //=> 'audio/wav' with polyfill
3              //   'audio/webm' in Chrome
4              //   'audio/ogg' in Firefox
5})

Limitations

This polyfill tries to be MediaRecorder API compatible. But it still has small differences.

WAV format contains duration in the file header. As result, with timeslice or requestData() call, dataavailable will receive a separated file with header on every call. In contrast, MediaRecorder sends header only to first dataavailable. Other events receive addition bytes to the same file.
Constructor options are not supported.
Polyfill ignores method call in the wrong state (like stop() during inactive state) instead of throwing an error.
BlobEvent.timecode is not supported.

Custom Encoder

If you need audio format with better compression, you can change polyfill encoder:

1  window.MediaRecorder = require('audio-recorder-polyfill')
2+ MediaRecorder.encoder = require('./ogg-opus-encoder')
3+ MediaRecorder.mimeType = 'audio/ogg'

The encoder should be a function with Web Worker in the body. Polyfill converts function to the string to make Web Worker.

1module.exports = function () {
2  function encode (input) {
3    …
4  }
5
6  function dump (sampleRate) {
7    …
8    postMessage(output)
9  }
10
11  onmessage = function (e) {
12    if (e.data[0] === 'encode') {
13      encode(e.data[1])
14    } else {
15      dump(e.data[1])
16    }
17  }
18}

No vulnerabilities found.

10

Dangerous-Workflow

Determines if the project's GitHub Action workflows avoid dangerous patterns.

10

Binary-Artifacts

Determines if the project has generated executable (binary) artifacts in the source repository.

10

License

Determines if the project has defined a license.

0

Code-Review

Determines if the project requires human code review before pull requests (aka merge requests) are merged.

0

Maintained

Determines if the project is "actively maintained".

0

Token-Permissions

Determines if the project's workflows follow the principle of least privilege.

0

Pinned-Dependencies

Determines if the project has declared and pinned the dependencies of its build process.

0

CII-Best-Practices

Determines if the project has an OpenSSF (formerly CII) Best Practices Badge.

0

Security-Policy

Determines if the project has published a security policy.

0

Fuzzing

Determines if the project uses fuzzing.

0

Branch-Protection

Determines if the default and release branches are protected with GitHub's branch protection settings.

0

SAST

Determines if the project uses static code analysis.

0

Vulnerabilities

Determines if the project has open, known unfixed vulnerabilities.

Reason

61 existing vulnerabilities detected

Details

Warn: Project is vulnerable to: GHSA-968p-4wvh-cqc8
Warn: Project is vulnerable to: GHSA-whgm-jr23-g3j9
Warn: Project is vulnerable to: GHSA-93q8-gq69-wqmw
Warn: Project is vulnerable to: GHSA-v6h2-p8h4-qcjw
Warn: Project is vulnerable to: GHSA-grv7-fg5c-xmjg
Warn: Project is vulnerable to: GHSA-pxg6-pf52-xh8x
Warn: Project is vulnerable to: GHSA-3xgq-45jj-v275
Warn: Project is vulnerable to: GHSA-phwq-j96m-2c2q
Warn: Project is vulnerable to: GHSA-ghr5-ch3p-vcr6
Warn: Project is vulnerable to: GHSA-fc9h-whq2-v747
Warn: Project is vulnerable to: GHSA-vjh7-7g9h-fjfh
Warn: Project is vulnerable to: GHSA-ww39-953v-wcq6
Warn: Project is vulnerable to: GHSA-7wwv-vh3v-89cq
Warn: Project is vulnerable to: GHSA-43f8-2h32-f4cj
Warn: Project is vulnerable to: GHSA-7r28-3m3f-r2pr
Warn: Project is vulnerable to: GHSA-r8j5-h5cx-65gg
Warn: Project is vulnerable to: GHSA-896r-f27r-55mw
Warn: Project is vulnerable to: GHSA-9c47-m6qq-7p4h
Warn: Project is vulnerable to: GHSA-76p3-8jx3-jpfq
Warn: Project is vulnerable to: GHSA-3rfm-jhwj-7488
Warn: Project is vulnerable to: GHSA-hhq3-ff78-jv3g
Warn: Project is vulnerable to: GHSA-29mw-wpgm-hmr9
Warn: Project is vulnerable to: GHSA-35jh-r3h4-6jhm
Warn: Project is vulnerable to: GHSA-952p-6rrq-rcjv
Warn: Project is vulnerable to: GHSA-f8q6-p94x-37v3
Warn: Project is vulnerable to: GHSA-xvch-5gv4-984h
Warn: Project is vulnerable to: GHSA-mwcw-c2x4-8c55
Warn: Project is vulnerable to: GHSA-92xj-mqp7-vmcj
Warn: Project is vulnerable to: GHSA-wxgw-qj99-44c2
Warn: Project is vulnerable to: GHSA-5rrq-pxf6-6jx5
Warn: Project is vulnerable to: GHSA-8fr3-hfg3-gpgp
Warn: Project is vulnerable to: GHSA-gf8q-jrpm-jvxq
Warn: Project is vulnerable to: GHSA-2r2c-g63r-vccr
Warn: Project is vulnerable to: GHSA-cfm4-qjh2-4765
Warn: Project is vulnerable to: GHSA-x4jg-mjrx-434g
Warn: Project is vulnerable to: GHSA-rp65-9cf3-cjxr
Warn: Project is vulnerable to: GHSA-3j8f-xvm3-ffx4
Warn: Project is vulnerable to: GHSA-4p35-cfcx-8653
Warn: Project is vulnerable to: GHSA-7f3x-x4pr-wqhj
Warn: Project is vulnerable to: GHSA-jpp7-7chh-cf67
Warn: Project is vulnerable to: GHSA-q6wq-5p59-983w
Warn: Project is vulnerable to: GHSA-j9fq-vwqv-2fm2
Warn: Project is vulnerable to: GHSA-pqw5-jmp5-px4v
Warn: Project is vulnerable to: GHSA-rhx6-c78j-4q9w
Warn: Project is vulnerable to: GHSA-h7cp-r72f-jxh6
Warn: Project is vulnerable to: GHSA-v62p-rq8g-8h59
Warn: Project is vulnerable to: GHSA-566m-qj78-rww5
Warn: Project is vulnerable to: GHSA-7fh5-64p2-3v2j
Warn: Project is vulnerable to: GHSA-hwj9-h5mp-3pm3
Warn: Project is vulnerable to: GHSA-9q5w-79cv-947m
Warn: Project is vulnerable to: GHSA-p8p7-x288-28g6
Warn: Project is vulnerable to: GHSA-c2qf-rxjj-qqgw
Warn: Project is vulnerable to: GHSA-m6fv-jmcg-4jfg
Warn: Project is vulnerable to: GHSA-cm22-4g7w-348p
Warn: Project is vulnerable to: GHSA-4wf5-vphf-c2xc
Warn: Project is vulnerable to: GHSA-72xf-g2v4-qvf3
Warn: Project is vulnerable to: GHSA-w5p7-h5w8-2hfq
Warn: Project is vulnerable to: GHSA-7p7h-4mm5-852v
Warn: Project is vulnerable to: GHSA-g3ch-rx76-35fx
Warn: Project is vulnerable to: GHSA-c4w7-xm78-47vh
Warn: Project is vulnerable to: GHSA-p9pc-299p-vxgp

Score

2.5

/10

Last Scanned on 2025-07-07

The Open Source Security Foundation is a cross-industry collaboration to improve the security of open source software (OSS). The Scorecard provides security health metrics for open source projects.

Learn More

@eatsjobs/audio-recorder-polyfill-es

Installations

Developer Guide

No

CommonJS

10.15.0

6.4.1

Pull Requests

0

59

3

56

Issues

13

64

51

Releases

Unable to fetch releases

Languages

Developer

Download Statistics

GitHub Statistics

Maintainers

Package Meta Information

Total Downloads

NaN

Weekly Downloads

Monthly Downloads

Yearly Downloads

Dev Dependencies

Audio Recorder Polyfill

Install

Usage

Audio Formats

Limitations

Custom Encoder

10

10

10

0

0

0

0

0

0

0

0

0

0

2.5

/10