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Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.


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As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

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Keep user sessions between visits





NPM version build status Maintainability Test Coverage

How many sessions does it takes for an user to create an account? Or purchase something? Now you can track these metrics!

What is a session anyway?
This is how a web session is defined by Google Analytics:

a period of time (30 minutes by default) that is extended automatically upon user interaction.

How does it ends?

  • after 30 minutes of inactivity.
  • at midnight (based on your GA settings, not client timezone).
  • campaing query change (utm or gclid)

A simple demo for the react implementation of this library that you use to inspect the session data:

Edit react-web-session demo


npm install --save web-session

And create a new session:

import WebSession from 'web-session';

const webSession = new WebSession(options);

// After a location change or event dispatched to GA, call this function to update the session.

You can pass an object to update() with custom data you might want in your session.


callback {function}: A function to receive the session data on every update.

duration {number}: The duration of the session in minutes. Defaults to 30

historySize {number}: The max number of visits's history to keep. Defaults to 50

name {string}: The name of the session in localStorage. Defaults to WebSessionData

timezone {number}: The timezone used in GA. Defaults to UTC

Stored data

  origin: {
    createdAt: '2000-01-01T00:15:00.000Z',
    href: '/',
    referrer: ''
  current: {
    campaign: {},
    expiresAt: '2000-01-01T00:15:00.000Z',
    href: '/',
    referrer: ''
  data: { // if using the optional data parameter with update
    something: true
  history: [ // the different campaigns the user has entered in your site
      createdAt: '2000-01-01T00:15:00.000Z',
      href: '/cpc?utm_source=cpc',
      referrer: ''
  visits: 1


Counting web sessions with JavaScript by @Swizec
How a web session is defined in Analytics