JSFoo 2017

JSFoo is a conference about JavaScript and everything related.

About the conference: JSFoo is a JavaScript conference hosted by HasGeek.

Theme this year: The broad theme this year is going to be Building Reliable Web Apps. Please refer to the Topics section below for the subject of talks and workshops we are looking for.

We are inviting proposals for:
Full-length 40 minute talks.
Crisp 15 minute talks.
Sponsored sessions, of 15 minutes and 40 minutes duration (limited slots available; subject to editorial scrutiny and approval).
Hands-on Workshop sessions, 3 and 6 hour duration.

##Selection process
Proposals will be filtered and shortlisted by an Editorial Panel. Please make sure to add links to videos / slide decks when submitting proposals. This will help us understand your speaking experience and delivery style. Blurbs or blog posts covering the relevance of a particular problem statement and how it is tackled will help the Editorial Panel better judge your proposals. We might contact you to ask if you’d like to repost your content on the official conference blog.

We expect you to submit an outline of your proposed talk – either in the form of a mind map or a text document or draft slides within two weeks of submitting your proposal.

Selection Process Flowchart

You can check back on this page for the status of your proposal. We will notify you if we either move your proposal to the next round or if we reject it. Selected speakers must participate in one or two rounds of rehearsals before the conference. This is mandatory and helps you to prepare well for the conference.

A speaker is NOT confirmed a slot unless we explicitly mention so in an email or over any other medium of communication.

There is only one speaker per session. Entry is free for selected speakers. As our budget is limited, we prefer speakers from locations closer home, but will do our best to cover for anyone exceptional. HasGeek provides these limited grants where applicable: two international travel and accommodation grants, three domestic travel and accommodation grants. Grants are limited and made available to speakers delivering full sessions (40 minutes or longer). Speaker travel grants will be given in order of preference to students, women, persons of non-binary genders, and individuals for Asia and Africa first.

Updated (19 April 2017): We are currently looking for talks in the following topics:

Testing: Testing tools and strategies; test driven development and testing culture; continuous integration and testing workflows; and case studies around testing your application.

Performance optimization: Performance analysis tools and techniques; best practices for building performant applications; browser, NodeJS, and framework internals; network protocols; and performance case studies.

Debugging: Tools for locating and fixing bugs in JavaScript applications; real world post-mortems of bugs that affected your organization; and using telemetry for debugging.

Immutability, type checking, and alternative programming languages: Alternatives to vanilla JavaScript; functional programming and immutability; types and type systems; and real-world case studies of introducing alternative programming languages and tools in your organization.

Build tooling: Build tools and automation, including task runners, linters, JavaScript bundlers, CSS pre- and post-processors, continuous integration tools, static analysis tools, and optimization tools.

Crash and performance monitoring: Monitoring applications for crashes and performance issues while in production.

##Commitment to open source
HasGeek believes in open source as the binding force of our community. If you are describing a codebase for developers to work with, we’d like for it to be available under a permissive open source licence. If your software is commercially licensed or available under a combination of commercial and restrictive open source licences (such as the various forms of the GPL), please consider picking up a sponsorship. We recognise that there are valid reasons for commercial licensing, but ask that you support us in return for giving you an audience. Your session will be marked on the schedule as a “sponsored session”.

##Important dates
Deadline for submitting proposals: 15 June 2017

**Conference dates: ** 15–16 September 2017

For more information about speaking proposals, tickets and sponsorships, contact info@hasgeek.com or call +91 76763 32020.

Note: We aren’t accepting any new talks.

Hosted by

JSFoo is a forum for discussing UI engineering; fullstack development; web applications engineering, performance, security and design; accessibility; and latest developments in #JavaScript. Follow JSFoo on Twitter more

Nikhil Khullar


Declarative programming: Why and how to write functional code using ES6

Submitted Jul 29, 2017

The talk is aimed at highlighting the differences between procedural and imperative paradigms in general, and Object Oriented Javascript and functional Javascript, in particular. The intent is to present a transition, not only in terms of syntax but the entire thought-process behind writing functional code using examples and live demo from basic Javascript, and then React, Redux and GraphQL. The audience will get to see how testability improves a great deal with pure functions, again with comparisons from codes solving the same problem written using both the paradigms. I intend to wrap it up by showing what functional programming is NOT and when both or either is suitable for particular categories of applications.


I intend to start with the language agnostic difference between procedural and imperative paradigms. Then, I will present how Javascript, specifically ES6, makes it a breeze to write code using either, and why the community is drifting towards the likes of Folktale, Ramda in React, Redux projects. I will be presenting the thought process of an engineer when attempting to solve a problem, and show live examples to solve the same using both OOP and functional programming, so that the audience can clearly see the difference for themselves, and feel empowered to make an informed choice of one over the other for their particular use case.


It would be ideal if participants bring a basic familiarity with Javascript, ES6 would be a plus. As far as imperative paradigm or functional programming goes, the talk aims to target developers who are absolute beginners in this domain and does not assume any prior knowledge.

Speaker bio

I am a full-stack web application developer, currently working as senior consultant for Livenation Ticketmaster, Hollywood CA. Having started my journey as a developer in 2009 and worked across the globe with teams of varying sizes and wearing different hats, I have closely witnessed the immense evolution in the way web apps are developed and perceived over the last seven years or so. I grew up as a practitioner of the object-oriented paradigm, until the dawn of ReactJS and Redux, which introduced me to the paradigm of “what” versus “how”, and well, I have never looked back ever since. I feel that after overcoming a lot of hurdles, I have finally managed to embrace the functional way in my profession, and everyday with ES6 ever since has indeed become a thoroughly fulfilling experience.


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Hosted by

JSFoo is a forum for discussing UI engineering; fullstack development; web applications engineering, performance, security and design; accessibility; and latest developments in #JavaScript. Follow JSFoo on Twitter more