Installations
npm install imprintjs
Developer Guide
Typescript
No
Module System
CommonJS
Node Version
10.16.3
NPM Version
6.9.0
Releases
Unable to fetch releases
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Verify real, reachable, and deliverable emails with instant MX records, SMTP checks, and disposable email detection.
Download Statistics
Total Downloads
13,889
Last Day
14
Last Week
53
Last Month
234
Last Year
4,678
Bundle Size
2.75 kB
Minified
1.15 kB
Minified + Gzipped
Package Meta Information
Latest Version
1.0.0
Package Id
imprintjs@1.0.0
Unpacked Size
166.50 kB
Size
71.75 kB
File Count
36
NPM Version
6.9.0
Node Version
10.16.3
Total Downloads
Cumulative downloads
Total Downloads
13,889
Last Day
100%
14
Compared to previous day
Last Week
23.3%
53
Compared to previous week
Last Month
21.9%
234
Compared to previous month
Last Year
-9.3%
4,678
Compared to previous year
Daily Downloads
Weekly Downloads
Monthly Downloads
Yearly Downloads
Dev Dependencies
4

A javascript library for browser fingerprinting.
Installation
Simply include imprint.min.js
in your HTML page. It has no other dependencies.
<script type="text/javascript" src="imprint.min.js"></script>
Usage
To create a fingerprint, instantiate a new instance of the ImprintJs
class and call getFingerprint
passing in a list of tests you wish to run. The getFingerprint
method returns a javascript Promise which once all tests have run, returns the generated fingerprint.
<script type="text/javascript">
var browserTests = [
"audio",
"availableScreenResolution",
"canvas",
"colorDepth",
"cookies",
"cpuClass",
"deviceDpi",
"doNotTrack",
"indexedDb",
"installedFonts",
"language",
"localIp",
"localStorage",
"pixelRatio",
"platform",
"plugins",
"processorCores",
"screenResolution",
"sessionStorage",
"timezoneOffset",
"touchSupport",
"userAgent",
"webGl"
];
imprint.test(browserTests).then(function(result){
console.log(result);
});
</script>
Supported Tests
Out of the box, ImprintJS comes with the following tests
- audio
- availableScreenResolution
- canvas
- colorDepth
- cookies
- cpuClass
- deviceDpi
- doNotTrack
- indexedDb
- installedFonts
- installedLanguages [experimental, inconsistent results]
- language
- localIp
- localStorage
- mediaDevices [experimental, inconsistent results]
- pixelRatio
- platform
- plugins
- processorCores
- publicIp [external request]
- screenResolution
- sessionStorage
- timezoneOffset
- touchSupport
- userAgent
- webGl
Custom Tests
If you'd like to add your own custom test, you can register a new test like so
imprint.registerTest("testAlias", function(){
return new Promise(function(resolve) {
var value = ""; // Some code to perform a test
return resolve(value);
});
});
All tests must have an alias, and a factory method that creates a javascript Promise that performs the actual test. We use promises to allow for async tests. On completion, the promise should always resolve. If a value cannot be determined, simply resolve with an empty string.
Known issues
- Some versions of Firefox for Android report inccorrect screen.height / screen.width values as they subtract the browser chrome when they shouldnt do resulting in inconsistant screenResolution test values. No current workaround. Issue 1120452
- Firefox for Android reports a color depth of 24 instead of 32 as they percieve the last 8 bits as being alpha and so shouldn't be concidered as part of the color depth. As a workaround, we treat all 32 bit colorDepths as 24 bit. Issue 424386
Acknowledgement
ImprintJS is based heavily on code from a number of libraries, namely
ImprintJS logo modified from fingerprint icon by Lloyd Humphreys from the Noun Project

No vulnerabilities found.

No security vulnerabilities found.